YAMAHA - LPX 500- Service Manual

Transcription

LPX-500
SERVICE MANUAL
IMPORTANT NOTICE
This manual has been provided for the use of authorized YAMAHA Retailers and their service personnel.
It has been assumed that basic service procedures inherent to the industry, and more specifically YAMAHA Products, are already
known and understood by the users, and have therefore not been restated.
WARNING:
Failure to follow appropriate service and safety procedures when servicing this product may result in personal
injury, destruction of expensive components, and failure of the product to perform as specified. For these
reasons, we advise all YAMAHA product owners that any service required should be performed by an
authorized YAMAHA Retailer or the appointed service representative.
IMPORTANT: The presentation or sale of this manual to any individual or firm does not constitute authorization, certification
or recognition of any applicable technical capabilities, or establish a principle-agent relationship of any
form.
The data provided is believed to be accurate and applicable to the unit(s) indicated on the cover. The research, engineering, and
service departments of YAMAHA are continually striving to improve YAMAHA products. Modifications are, therefore, inevitable and specifications are subject to change without notice or obligation to retrofit. Should any discrepancy appear to exist, please
contact the distributor's Service Division.
WARNING:
Static discharges can destroy expensive components. Discharge any static electricity your body may have
accumulated by grounding yourself to the ground buss in the unit (heavy gauge black wires connect to this
buss).
IMPORTANT: Turn the unit OFF during disassembly and part replacement. Recheck all work before you apply power to the
unit.
100801
Copyright 2002 YAMAHA CORPORATION
This manual is copyrighted by YAMAHA and may not be copied or
redistributed either in print or electronically without permission.
LPX-500
HOME CINEMA PROJECTOR
LPX-500
LPX-500
Introduction
This Service Manual describes hardware information that is necessary for effective troubleshooting and
service of the LPX-500.
Any product improvement or service manual correction information will be distributed by service bulletin.
HOW TO USE THE SERVICE MANUAL
Since the service manual describes topics that may be required for field service, you may utilize this for
repair or failure diagnosis. The contents are as follows:
Before you start any service, read and observe safety precautions and rules.
precautions : SAFETY,MAINTENANCE,PERSON
chapter 1
: GENERAL (PART NAME, SYSTEM FUNCTION, SPECIFICATION, etc...)
chapter 2
: THEORY OF OPERATION (HARDWARE,INTERNAL CONNECTION, FUNCTION OF
UNITS, etc...)
chapter 3
: TROUBLE SHOOTING
chapter 4
: DISASSEMBLE & ASSEMBLE (ASSEMBLY PROCESS FOR MAIN FRAME)
chapter 5
: PARTS LIST
chapter 6
: OTHER
VCCI RADIO FREQUENCY INTERFERENCE SELF RESTRICTION
This product is classified as type 1 information equipment and uses radio frequency energy. This fully
complies with the specified limits in the computer information equipment radio interference regulation (VCCI
rules). If not installed and used properly per manufacturer’s instructions, it may cause interference to radio
and television reception.
CAUTION
REPLACEMENT AND RETURNING OF THE OPTICAL ENGINE UNIT
The optical engine and MA board together as a set is called the “optical engine unit”.
If a failure has occurred with any part of the optical engine unit, be sure to replace the optical engine
unit as a whole. Neither the optical engine nor MA board can be replaced independently.
In order to have the broken optical engine repaired, please be sure to send it as the optical engine
unit (optical engine + MA board) and use the package box especially designed for this unit. (Refer to
pages 85 and 86.)
The lamp inner unit is not included in the optical engine unit.
When sending back the optical engine unit, please remove the lamp inner unit.
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LPX-500
LPX-500
Introduction
SAFETY INSTRUCTIONS
1. MAINTAINING OPERATOR SAFETY
(1). PREVENTING ELECTRIC SHOCKS
• Turn off the power switch and disconnect the power cord from the AC outlet before carrying out
any disassembly and assembly work on this projector.
• If power needs to be supplied to the projector while the cover is removed (such as when making
adjustments), take off any metallic objects such as wristwatches, shirt cuff buttons, rings and tie
pins which may pose the danger of coming into contact with the projector.
(2). PREVENTING INJURY
• Projector components such as the lamp inner housing and the area around it may still remain hot
after the power has been turned off, even when the cool-down period is compete. Furthermore, if
removing the cover in order to carry out adjustments while power is being supplied to the projector,
be careful not to touch the fans (intake and exhaust).
• Always wear gloves when disassembling and reassembling the scanner in order to avoid injury from
metallic parts with sharp edges.
• Do not look directly into the projector’s lens while power is being supplied to the projector, otherwise
injury to the eyes may occur.
(3). PREVENTING ACCIDENTS
• Place the projector on a stable, level surface when carrying out any repair or adjustment work, to
prevent the projector and its components from slipping and falling down. Furthermore, do not place
any tools or projector components on top of or underneath the projector.
• Avoid working on the projector in places where other people might receive injuries from touching the
projector while it is in a state of disassembly. Furthermore, do not leave the projector unattended in
the workplace at such times.
• When turning on the projector’s power, always use the accessory power cord to connect the projector
to the power supply, and always make sure that the power supply is properly grounded.
2. MAINTAINING THE PROJECTOR IN GOOD CONDITION
(1). PREVENTING STATIC ELECTRICAL DAMAGE
• When disassembling and assembling the projector, always use a grounding strap and a grounding
mat. Furthermore, when replacing electrical circuit components (such as circuit boards and optical
engine), touch the static-proof bag containing the new parts against a metallic section of the projector
before removing the component from the static-proof bag.
(2). USE OF GENUINE PARTS
• When replacing the structural components inside the projector (including the lamp inner housing), use
only replacement parts supplied by YAMAHA and listed in the projector’s Parts List.
• Use the accessory power cord and interface cable provided with the projector.
(3). SAFETY TESTING
• The following tests should be carried out on repair parts used in the LCP.
(3-1) . Test items
• Ground continuity check
• Illumination check
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LPX-500
LPX-500
Introduction
(3-2). Testing procedure
Carry out testing in the order given below.
Repair
Ground continuity check
Illumination check
End
Safety inspections
(3-3). Testing methods
1). Ground continuity check
Testing apparatus: Multimeter (with sensitivity down to 0.1 Ω)
Check item
<Ground continuity check>
Inspection method
Multimeter
Standard/Judgment level
Should be no resistance
(0.5 Ω or less)
Multimeter settings
Display
1.
2.
3.
4.
5.
Turn on the power switch.
Set the range selection switch to Ω.
Connect the black lead wire to the COM terminal.
Connect the red lead wire to the V/Ω/Hz terminal.
Check that the resistance at (1) in the diagram
below is 0.5 Ω or less.
AC inlet ground
DC/AC, SW
Range selection switch
Projector AC inlet
Terminals
COM
V, Ω, Hz
Exposed metal part of projector
4
(1)
RS-232C connector
LPX-500
LPX-500
Introduction
2). Illumination check
•Test conditions: Input a PC or video signal to the LPX-500 and check the illumination for about 5
minutes.
•Judgment:
Projector should operate normally.
3). Other
• Check that the connectors at both ends of the power cord are not dirty or bent, and clean them if
they are dirty. Furthermore, if there is any noticeable discoloration on the power cord, it should be
replaced (to prevent the chance of fire due to flashover).
• When connecting the connector cables and interface cables inside the projector, make sure that the
cable connectors are pushed on as far as they will go.
• To prevent problems caused by dirt getting into the optical system, always disassemble and assemble
the projector in an area which is free from floating dust.
• When disconnecting the FPC cable of the control panel from connector CN908 on the MA board,
release the connector lock first. (When releasing the connector lock, use tweezers or similar to push
up both sides of the connector at the same time.)
CN908
Projection lens
CN908 enlarged view
Locked
Unlocked
MA board
• When disconnecting the three FPC cables for the light valves from their connectors, release the
connector locks first.
Locked
Unlocked
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LPX-500
LPX-500
Introduction
Contents
○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○
Chapter 1 Product General
○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○
1.1. PART NAME ............................................................................................................. 8
1.1.1. Outside .............................................................................................................. 8
1.1.2. Internal components ....................................................................................... 10
1.1.3. Remote control ............................................................................................... 11
1.2. SPECIFICATIONS ................................................................................................... 12
1.3. INTERFACE SPECIFICATIONS ............................................................................ 13
1.3.1. TRIGGER OUT Interface ............................................................................... 13
1.3.2. RS-232C Interface .......................................................................................... 13
1.3.3. D4 VIDEO Interface ....................................................................................... 14
1.3.4. RGB/YPBPR/YCBCR (INPUT B) Interface .................................................. 14
1.3.5. DVI Interface ................................................................................................... 15
1.3.6. S VIDEO Interface ......................................................................................... 16
1.3.7. G/Y B/PB/CB R/PR/CR SYNC (INPUT A) Interface ................................... 16
1.4. DEMENSIONS ......................................................................................................... 17
○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○
Chapter 2 Theory OF Operation
○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○
2.1. OVERVIEW OF HARDWARE ................................................................................ 18
2.1.1. Circuit System Component Connection Diagram ........................................ 19
2.1.2. Connector/Pin Layout ..................................................................................... 20
2.1.3. Circuit Block .................................................................................................... 22
2.1.4. Optical Engine ................................................................................................ 23
2.2. POWER SUPPLY UNIT ......................................................................................... 26
2.3. BALLAST UNIT ....................................................................................................... 29
2.4. MA BOARD ............................................................................................................. 30
2.5. CONTROL PANEL .................................................................................................. 33
2.6. IF BOARD ................................................................................................................ 34
2.7. RC RECEIVER SENSORS .................................................................................... 35
2.8. TEMPERATURE CONTROL .................................................................................. 37
2.8.1. Sensors and Switches ................................................................................... 37
2.8.2. FAN OPERATION .......................................................................................... 39
2.8.3. LED INDICATORS ......................................................................................... 41
○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○
Chapter 3 Troubleshooting
○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○
3.1. BEFORE CARRYING OUT TROUBLESHOOTING .............................................. 43
3.1.1. Troubleshooting Tools and Equipment ......................................................... 43
3.1.2. Field Replacement Parts ............................................................................... 43
3.2. ENTRY ..................................................................................................................... 44
3.2.1. External Checking .......................................................................................... 45
3.2.2. Internal Cable Check ..................................................................................... 46
3.2.3. Power Supply ON/OFF .................................................................................. 47
3.2.4. Display input/output and image quality ........................................................ 50
3.2.5. Control panel .................................................................................................. 52
3.2.6. Remote control operation .............................................................................. 53
3.2.7. Other ............................................................................................................... 54
○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○
Chapter 4 Disassembly & Assembly
○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○
4.1. DISASSEMBLY AND ASSEMBLY ......................................................................... 55
6
LPX-500
LPX-500
Introduction
4.2. PROJECTOR DISASSEMBLY AND ASSEMBLY ................................................. 58
4.2.1. Lamp Inner Unit ............................................................................................. 59
4.2.2. Upper Case Unit ............................................................................................ 60
4.2.3. IF Panel Unit ................................................................................................. 61
4.2.4. MA Board Unit ................................................................................................ 62
4.2.5. MA Fixing Plate LF ........................................................................................ 64
4.2.6. RC Receiver Unit ........................................................................................... 64
4.2.7. Optical Engine ................................................................................................ 65
4.2.8. Intake Duct Unit ............................................................................................. 66
4.2.9. Intake Fans ..................................................................................................... 67
4.2.10. Lamp Cover Detection Switch .................................................................... 68
4.2.11. Exhaust Fan Unit ......................................................................................... 69
4.2.12. Exhaust Fan and LAMP Thermistor ........................................................... 69
4.2.13. Ballast Unit and Power Supply Unit (1) ..................................................... 70
4.2.14. IF Board Unit ................................................................................................ 71
4.2.15. Power Supply Unit (2) ................................................................................. 71
4.2.16. IF Board Assembly and IF Fixing Plate .................................................... 72
4.2.17. Air Filter ........................................................................................................ 72
○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ Chapter
5 Parts List
○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○
5.1. EXPLODED VIEW .................................................................................................. 74
5.2. MECHANICAL PARTS ............................................................................................ 75
○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ Chapter
6 Other
○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○
6.1. REMOTE CONTROL TRANSMITTER ................................................................... 77
6.2. OPTICAL ENGINE UNIT PACKAGE DIAGRAM .................................................. 78
6.2.1. Optical engine packing material ................................................................... 78
6.3. PACKING THE OPTICAL ENGINE UNIT ............................................................. 79
6.3.1. Preparation before packing ........................................................................... 79
6.3.2. Packing procedure ......................................................................................... 79
7
LPX-500
LPX-500
1.1. PART NAME
1.1.1. Outside
Lamp cover
• Main unit
<Front/Top>
Control panel
Lamp cover opening switch
Air exhaust vent
Zoom ring
Focus ring
Front adjustable foot
Lens cap
Remote control lightreceiving area
Figure 1-1
<Bottom>
Front adjustable foot
Air filter (air inlet)
Rear adjustable foot
Suspension bracket fixing points
(4 point)
Figure 1-2
8
LPX-500
LPX-500
• Control panel
q [MENU] button
w h and g buttons
e
button
i
o
!0
!1
!2
!3
!4
indicator
r
t [STANDBY/ON] button
y LAMP/COVER indicator
u TEMP/FAN indicator
[INPUT] button
[PATTERN] button
[ASPECT] button
[PICTURE MODE] button
[ESCAPE] button
– and + buttons
[SHIFT] button
Figure 1-3
• Rear
RS-232C port
D4 VIDEO port
TRIGGER OUT port
INPUT B port
DVI port
Main power switch
S VIDEO port
INPUT A port
VIDEO port
Power inlet
Figure 1-4
9
LPX-500
LPX-500
1.1.2. Internal components
MA board
LAMP thermistor
Exhaust fan
Figure 1-5
Intake fan
Ballast unit
L/V thermistor
Optical engine
IF board assembly
Figure 1-6
10
Power supply unit
LPX-500
LPX-500
1.1.3. Remote control
Remote control light-emitting area
Outputs infrared remote control signals.
[AUTO] button
Automatically adjusts computer
images to the optimum images.
[PATTERN] button
Projects a test pattern for image adjustment.
The test pattern switches between Crosshatch →
Grayscale Pattern → Off each time the button is
pressed.
[ESCAPE] button
If pressed while a menu is being displayed, the
display returns to the next-highest level.
[STANDBY/ON] button
Press to turn the projector power on and off.
[LIGHT] button
[MENU] button
When slid up or down, the [STANDBY/ON],
[PATTERN], [AUTO], [MENU], [ESCAPE],
[ASPECT] and [PICTURE] buttons illuminate
for 10 seconds.
The environment setting menus turn on and off
each time the [MENU] button is pressed.
button
When this button is pressed, the line menu appears.
When a menu is being displayed, tilt the button up,
down or to the left or right to select menu commands,
and press to accept and activate selected
commands.
[ASPECT] button
Selects the aspect ratio for projected images from
one of five settings. The aspect ratio switches
between Normal → Squeeze → Zoom → T.B.D. →
Through → Squeeze Through each time the button
is pressed.
[PICTURE] button
Switches the color mode between A → B → C →
PC → sRGB each time the button is pressed.
[STILL] button
Screen image playback pauses and resumes each
time the [STILL] button is pressed. However, the
video and audio playback still continues while
moving images are paused, so image playback will
not resume exactly from the point where playback
was paused.
[HIDE] button
[INPUT] button
[S VIDEO]:
[VIDEO]:
[A]:
[B]:
[DVI]:
[D4]:
Changes video input
S VIDEO port.
Changes video input
VIDEO port.
Changes video input
INPUT A port.
Changes video input
INPUT B port.
Changes video input
DVI port.
Changes video input
D4 VIDEO port.
to the source connected to the
The projected images and audio switch off and on
each time the [Blank] button is pressed.
When the images and audio are switched off, the
screen will appear in accordance with the setting
made using the “Blank” command in the “Settings”
menu.
However, the video and audio playback still
continues while moving images are paused, so
image playback will not resume exactly from the
point where playback was paused.
[MEMORY] button
Retrieves settings that have been saved using the
“Memory” command in the “Video” menu and adjusts
the images being projected.
Figure 1-7
11
LPX-500
LPX-500
1.2. SPECIFICATIONS
Prooduct name
LPX-500 Home cinema projector
Dimensions
409 (W) x 111 (H) x 281 (D) mm
(16-1/8 (W) x 4-3/8 x 11-1/16 (D) inches) (not including protruding parts)
Panel size
0.87 inches
Display method
Polysilicon TFT active matrix
Driver method
Full-line 12-phase block sequential writing
Resolution
921,600 pixels (1280 (W) x 720 (H) dots) x 3
Focus adjustment
Manual
Zoom adjustment
Manual (approx. 1:1.35)
Lamp (light source)
UHP lamp, 150W, Model No.: PJL-5015
Power supply
100 - 120 VAC, 2.7A
200 - 240 VAC, 1.3A
50/60 Hz
12
Operating temperature
+5°C - +35°C (41°F - 95°F) (No condensation)
Storage temperature
-10°C - +60°C (14°F - 140°F) (No condensation)
Weight
Approx. 4.8 kg (10 lbs. 9 oz.)
Connectors
DVI
1
DVI-D
INPUT A
1
4RCA pin jack
INPUT B
1
Mini D-sub 15-pin (female)
VIDEO
1
RCA pin jack
S VIDEO
1
Mini DIN 4-pin
D4 VIDEO
1
D4 terminal
RS-232C
1
D-Sub 9-pin (male)
TRIGGER OUT
1
3.5 mm mini jack
LPX-500
LPX-500
1.3. INTERFACE SPECIFICATIONS
RS-232C port
D4 VIDEO port
TRIGGER OUT port
INPUT B port
DVI port
Main power switch
S VIDEO port
Power inlet
VIDEO port
INPUT A port
Figure 1-8
1.3.1. TRIGGER OUT Interface
3.5 mm stereo mini jack
Pin No.
Signal name
1
GND
2
+12V
3
Spare
J900
3
2
1
*15mA can be drawn from 12V during “Lamp ON”.
1.3.2. RS-232C Interface
CN001
Pin No.
6
1
9
5
Signal name
1
CD
2
RD(Receive Data)
3
TD(Transmit Data)
4
DTR
5
GND
6
DSR
7
RTS(Request To Send)
8
CTS(Clear To Send)
9
RI
13
LPX-500
LPX-500
1.3.3. D4 VIDEO Interface
Pin No.
8
14
1
7
Signal name
1
Y (G)
2
Y (G)-GND
3
Pb (B)
4
Pb (B)-GND
5
Pr (R)
6
Pr (R)-GND
7
Subline 1
8
Line 1
9
Line 2
10
Subline 2
11
Line 3
12
Switch-GND
13
Subline 3
14
Switch
1.3.4. RGB/YPBPR/YCBCR (INPUT B) Interface
HD D-sub , 15pin
CN100
7513S-15G2
11
6
1
Pin No.
Pin name
Computer
Component
1
Red video signal
Cr / Pr
2
Green video signal
Y
3
Blue video signal
Cb / Pb
15
10
5
Pin No.
Pin name
Computer
Component
9 (None)
(No pin)
(No pin)
10
Sync GND
None
11
Monitor bit
None
ID bit 0
4
Monitor bit
None
12
SDA
None
None
13
Horizontal sync/
None
ID bit 2
5
GND
composite sync
14
6
GND
GND
14
Vertical sync
None
7
GND
GND
15
SCL
None
8
GND
GND
LPX-500
LPX-500
1.3.5. DVI Interface
CN400
C3
C4
17
9
1
24
16
8
C2
C1
Pin No.
Pin name
Pin No.
Pin name
Digital
Analog
1
Data 2-
15
GND
GND
2
Data 2+
16
Hot Plug Detect
3
GND
17
Data 0-
4
Spare
18
Data 0+
5
Spare
19
GND
6
DDC Clock
20
Spare
7
DDC Date
21
Spare
8
No Connect
9
Data 1-
10
11
Digital
Analog
V Sync
22
GND
23
Clock +
Data 1+
24
Clock -
GND
C1
Spare
R
12
Spare
C2
Spare
G
13
Spare
C3
Spare
B
14
+5V Power
C4
No Connect
H Sync or
Comp Sync
15
LPX-500
LPX-500
1.3.6. S VIDEO Interface
4-pin mini-DIN with detect pin
Pin No.
CN003
TSC7708-012021
4
3
2
1
6
Signal name
1
GND
2
GND
3
Y signal input
4
C signal input
5
Input detect pin
6
GND
5
1.3.7. G/Y B/PB/CB R/PR/CR SYNC (INPUT A) Interface
RCA pin jack x 4
SYNC
16
GND
2
CVBS
3
GND
4
NC
5
VAINL
6
GND
7
VAINL
8
VAINR
9
GND
10
HD/SYNC
1
2
4 3
5
6
10
9
R/PR/CR (Red)
Signal name
1
7
B/PB/CB (Brue)
8
G/Y (Green)
CN002
JPJ4791-010234
Pin No.
DGND
DGND
LPX-500
LPX-500
1.4. DIMENSIONS
281
(11-1/16")
111
(4-3/8")
125
(4-15/16")
409
(16-1/8")
Unit : mm (inch)
17
LPX-500
LPX-500
2.1. OVERVIEW OF HARDWARE
The hardware for the LPX-500 can basically be divided into two sections: the optical engine and the
circuit system.
This section of the manual describes the configuration block diagram or the hardware and gives an
outline of the functions.
The area inside the dotted lines are the optical engine (single integrated component).
AC input
Circuit DC voltage
generator
Ballast output
generator
MA board
IF board
Circuit initial setting operations and interface
control
Internal operation control (sensors, cooling fan,
speaker, remote control, etc.)
R/G/B video signal generation
Ballast unit
For lamp inner
housing
AC voltage
S-Video
Video
Y
Cb/Pb
Cr/Pr
Control panel
Intake fan *1
RC receiver sensor
Lamp fan
Light valves
R/G/B
Prism
R/G/B integration
Projection lens unit
(focus)
Exhaust fan *2
Lamp inner unit
Light guide unit
*1: The intake fan cools the R, G and
B light valves (LCD panels).
150 W
Lamp inner
housing
Light source divided into 3
components (R, G and B) by
lenses, filters and mirrors.
*2: The exhaust fan mainly dissipates
heat from the lamp inner housing.
*3: During repair work, the section
enclosed by the dotted lines should
be handled as a single unit.
Figure 2-1
Overview of display operation
1). Digital RGB signals are supplied from the computer interface to the MA board. Analog signals (SVideo signals and Video signals) pass through the IF board and are supplied to the MA board.
(Analog signals are converted to digital signals at the IF board.)
2). The display signals (in digital format) are momentarily accumulated in the video memory on the
MA board, and then the DR board generates signals to drive the R, G and B light valves.
3). The R, G and B light valves each consist of a single panel which lets through or shuts off the light
which is supplied from the light guide unit.
4). The light which passes through from the previously-mentioned light guide unit is integrated by the
prism and is then projected as an image via the projection lens unit.
18
LPX-500
LPX-500
2.1.1. Circuit System Component Connection Diagram
4pin
CN1200
Trigger
SERIAL
RS-232C
CN510
D4 VIDEO
CN100
CN400
PC IN
DVI-I
CN2102
J900
Ballast
PJ130MA BOARD
ASSEMBLY
24pin
Power Supply Unit
CN2100
CN1900 XGA
CN1901 0.9 WIDE
GREEN
4pin
CN1102
CN1104
RED
CN2000 XGA
CN2002 0.9 WIDE
L/V
Thermistor
LAMP
CN1100 CN1105
BLUE
4pin
LAMP
Thermistor
CN1800 XGA
CN1801 0.9 WIDE
3pin
CN902
CN908
CN1103
3pin
CN1101
CN901
Intake Fan 2
8pin
Intake Fan 1
Exhaust Fan
3pin
3pin
FFC CABLE
Lamp Cover Detection Switch
RC Receiver Cable
Lamp Fan
2pin
PJ130RC
CN2000 BOARD
Control Panel
The circuit system is shown in the following diagram. The various components are connected to the
MA board which is the central component of the system.
SCI Cable (5P) 5Pin
Board to Board
40pin
CN004
SERIAL
PJ210IF BOARD
ASSEMBLY
CVBS S-VIDEO
J3000 CN3000
CN3001
Y/Cb/Cr
SYNC
Figure 2-2
19
LPX-500
LPX-500
2.1.2. Connector/Pin Layout
20
1
2
3
4
5
6
Pin layout for power supply connector (CN2100)
PWON
7
GND
13
GND
GND
8
+7V
14
GND
+13V
9
+5V
15
+13V
+13V
10
+3.3V
16
+13V
GND
11
GND
17
+13V
-7V
12
+18V
18
GND
1
2
3
4
5
Pin layout for SCI cable connector (CN2102)
FLAG
1
FLAG/TxD(coll)
GND
2
FLAG/TxD(emitter)
COMMON+
→
3
COMMON(anodes)
SCI
4
SCI/Sync(cath)
NC
5
RxD(cath)
1
2
3
4
5
Pin layout for control panel connector (CN908)
KOUT3
6
KIN3
11
TMPLED0
KOUT1
7
KIN2
12
LMPLED1
KOUT2
8
KIN1
13
LMPLED0
KOUT0
9
GND
14
OPLED1
KIN0
10
TMPLED1
15
OPLED0
1
Pin layout for intake fan 1 connector (CN1102)
FVVLV1
2
FRSLV1
3
GND
1
Pin layout for intake fan 2 connector (CN1103)
FVVLV2
2
FRSLV2
3
GND
1
Pin layout for LAMP fan connector (CN1101)
FVVLVMP
2
FRSLVMP 3
GND
1
Pin layout for exhaust fan 1 connector (CN1100)
FVVEX
2
FRSEX
3
GND
1
2
Pin layout for L/V thermistor connector (CN1104)
CDLV
3
DGND
DGND
4
TMPLV
1
2
Pin layout for LAMP thermistor connector (CN1105)
CDLMP
3
DGND
DGND
4
TMPLMP
1
2
3
4
Pin layout for RC receiver cable connector
MA board (CN902)
RC receiver board (CN2000)
GND
1
DGND
GND
→
2
DGND
+5V
3
+5V_S
RQIR
4
RQIR
19
20
21
22
23
24
GND
+7V
+5V
+3.3V
GND
GND
LPX-500
LPX-500
1
2
3
4
5
6
7
8
9
10
Pin layout for light
N.C.
11
DY
12
VSSY
13
DIRY
14
LCCOM
15
NRS2
16
VID12
17
VID11
18
VID10
19
VID9
20
valve connector (CN1801/1901/2001) (R/G/B)
VID8
21
VDDX
31
LCCOM
VID7
22
CLX32
VDDY
VID6
23
CLX
33
CLYVID5
24
DIRX
34
CLY
VID4
25
ENBX4
35
DY
VID3
26
ENBX3
36
N.C.
VID2
27
ENBX2
37
GND
VID1
28
ENBX1
38
GND
VSSX
29
NRG
DX
30
NRS1
1
Pin layout for lamp cover detection switch connector (CN901)
LCDET
2
GND
1
2
3
4
5
6
7
8
9
10
Pin layout for MA-IF board to board connector (CN510-CN3002)
3DVINS[1] 11
GND
21
3DRSTN
31
GND
3DVINS[0] 12
4RCA_CG 22
RCA_CBS 32
3DYVI
+3.3V
13
RCAYR
23
+3.3V
33
3DCVI
+3.3V
14
GND
24
+3.3V
34
GND
DSUB_CR 15
RCAYG
25
DSUB_Y
35
3DYVO
GND
16
GND
26
GND
36
3DCVO
DSUB_CB 17
RCAYB
27
RCAFB
37
GND
GND
18
GND
28
GND
38
GND
SDA
19
+5V_AT
29
PAL_SEL
39
+13V
SCL
20
-5V_AT
30
E_CS
40
+13V
21
22
Figure 2-3
D-sub 9
3.5mm
Jack
1-RCA
S
3-RCA
D4
PC IN
DVI- I
H/V
RS-232-C
Trigger OUT
CVBS
Y/C
Analog
YCrCb
ID- ROM
RS Driver
HIN202CBN
IR Receiver
(Front / Rear)
Selector
LV157
Selector
HC4053 H/V
ID-ROM(D)
ID-ROM(A)
3D Y/C
separation
TC90A65F
IF BOARD
DDC
Analog RGB
DDC
Analog RGB
Digital RGB
(TMDS)
MA BOARD
I2C
VPC3230D
Video
Decoder
Sync Slice
MAX907
Video
SW
AD8183
X2
SCART
Selector
4wire
- Serial
THC7116
ADC
Sync Sep
4wire
- Serial
I2C
IP Transfer
FLI2200
Key + LED
SRAM 1Mbit
IDT71V016S15PH
H/V/CLK/PEN
YVU4:2:2
Selector Field
LV157
Selector
LV257
Flash ROM 16Mbit
MBM29DL163BD
Field
PIGMON H/V/CLK
Color
48bit
Space
Converter
H/V/CLK
TMDS Receiver 48bit
TFP501
PSCI
(EV9816C)
V-port
H/V/CLK/PEN
V-port
Data
V-port
Field
G-port
H/V/CLK
PW164A
G-port
Data
3wire-serial
GAUGE4 24bit
EV0009SA
Driver CPU
H/V/CLK
24bit
LCD
Controller
DAC for
Development
ADV7123
M62367GP
DAC
I2C
LCD Reference
Voltage
Lamp
Th2
Th1
Fan
4
Fan
Driver4
ADC
AD7417
Fan
3
Fan
2
Fan
1
LCD
LCD
LCD
Fan
Driver3
Fan
Driver2
Fan
Driver1
LCD Driver
ET6070
X2
ET1031
LCD Driver
ET6070
X2
ET1031
LCD Driver
ET6070
X2
LPX-500
LPX-500
2.1.3. Circuit Block
The control circuits are shown in the following diagram. The various circuits are connected to the MA
board which is the central component of the system.
LPX-500
LPX-500
2.1.4. Optical Engine
The optical engine consists of four principle components (light guide unit, pop unit [light valves R/G/
B,prism unit],lamp inner unit and projection
lens). These components form a single unit for adjustment purposes.
Lamp inner unit
Projection lens
Prism unit
Light guide unit
Light valve (B)
Light valve (G)
Light valve (R)
Figure 2-4
Caution
• Do not subject the optical system components to any shocks, and do not disassemble the light
guide unit, otherwise color distortion may occur.
• Each component is adjusted at the factory for installation in its particular position.
• Furthermore, the data which is used to compensate for optical system characteristics is stored on
the MA board. Accordingly, do not individually replace any of the components with components
from other optical engines.
23
LPX-500
LPX-500
Table2-1. Component Functions
Component name
Lamp inner unit
Light guide unit
POP unit
Projection lens
Function/Other
Contains UHE 150W discharge lamps which are used as the light source.
The light guide unit disperses the light from the light source via lens arrays A
and B in order to provide uniform illumination. In addition, a UV filter removes
any harmful ultraviolet light from the LCD. After this light is polarized, it is then
split into 3 spectrums (R, G and B).
The optical head unit consists of three light valves and a prism unit. Signals are
sent to the light valves in 12 steps. The prism unit integrates the R/G/B signals
and sends them to the projector lens unit.
Focus adjustment
(1). Lamp inner unit
This unit includes the light source lamp (UHE-150 W) and the ballast power supply connector. The
lamp is secured to the top of the projector by two screws, and the lamp is a user replaceable
item.
The luminance of the lamp inner unit becomes lower over time as the lamp is used. The maximum
degree of luminance is obtained when the lamp is first being used, but after approximately 3000
hours of usage time(Residual rate), the luminance will drop to about half of this.The ballast power
supply connector is used to supply the AC voltage for driving the lamp to the ballast unit. The lead
wires are connected to the lamp.
Ballast power supply
connector
Figure 2-5
As mentioned above, the luminance of the lamp inner unit becomes lower over time as the lamp is used.
The lamp has an operating life of about 3000 hours, but if it appears that the luminance of the lamp
has dropped significantly, it is recommended that the lamp inner unit be replaced even if the total
operating time has not yet reached 1500 hours.
The cumulative operating time for the lamp inner unit is stored in IC800 on the MA board. When
the lamp is reaching or has reached the end of its useful operating life, IC902 (power save
controller) outputs a signal in order to carry out control as follows.
1). When the cumulative operating time reaches 2900 hours (2900 hours or more), the indicator
lamp flashes orange. The controller (IC902) on the MA board counts the cumulative lamp
operating time and writes the data to IC800. When the indicator lamp starts flashing orange, the
lamp only has 100 hours of operating time left, and so the lamp should be replaced as soon as
possible.
2). When the cumulative operating time reaches 3000 hours
This represents the end of the useful operating life of the lamp. When the lamp is replaced, the
lamp timer should be reset. Use the Reset Lamp Timer function in the About menu to reset the
lamp timer.
24
LPX-500
LPX-500
The circuit diagram is shown in Figure 2-6.
MA block
LED
indicator
Ballast output ON/OFF
Blown lamp detection
IC902
(PSCI)
IC800
Power supply ON/OFF
Power cut detection
Fan control
CN2102
CN2100
Lamp Inner Unit
Ballast Unit
Power Supply Unit
Figure 2-6 Lamp Inner Unit Control Circuits
• The LPX-500 has an automatic lamp shutoff function which automatically turns the lamp off if no signal
is input for a continuous period of 30 minutes. (It is possible to set the time by using the menu.)
(2). Light guide unit
The light guide unit consists of three output filters (R, G and B). It filters out harmful ultraviolet
radiation from the light which is output from the lamp inner housing, and also disperses the light so
that even luminance is obtained. Inside the light guide unit are lenses for dispersing the light from
the light source, and mirrors for separating the light into its spectral components. The diagram
below shows internal views of the light guide unit.
Caution
• The light guide unit, optical head/prism unit and projection lens unit are treated as a single unit
which is termed the optical engine.
Optical system drive block
Optical engine
Light valve R
Projection lens
Lamp inner unit
(light source)
Light valve G
Light valve B
Light guide unit
Prism (R/G/B integration)
Ballast power supply
MA board
Figure 2-7
25
LPX-500
LPX-500
2.2. POWER SUPPLY UNIT
The power supply unit consists of the AC inlet, main power supply switch, a filter circuit assembly and
a fuse.
Main power supply
switch
Filter circuit
Fuse
AC inlet
Figure 2-8
(1). Circuit block
Thermostat
AC inlet
AC input
Ballast
connector
switch
EMI filter B
EMI filter A
Smoothed output
Primary-side
power supply
smoothing/control
block
Main power supply
(Controled power supply)
DC output
Sub power supply
(+3.3V/+5V)
Station power supply
Power supply
cooling fan
Figure 2-9
Main power supply SW
Fuse
EMI filter circuit
26
The main power supply is disconnected mechanically.
: Overcurrent prevention. It blows when overcurrent occurs due to a
problem with power supply unit operation.
: Eliminates interference from the AC power supply input.
LPX-500
LPX-500
(2). Overview of operation
The output cable of the power supply unit is connected to the CN2100 connector on the MA board.
It allows the following voltages and signals to be transmitted.
• PWDS signal for power supply OFF detection (assigned)
• DC output
• Fan control signal (FANCY) ... Control signal for built-in power supply cooling fan
• Power supply ON/OFF signal (PWON)
Caution
• If the power cord is still connected to the projector after the power is turned off, background power
is still supplied to the MA board via the CN2100 connector.
• The EMI filter/primary-side regulator circuit eliminates interference from the AC line and generates
a DC voltage for the regulators.
• The two regulator circuits generate the DC voltages shown in the table below by means of
switching regulators. These regulators detect the potential of the +5 V output and provide feedback
to the switching circuit, so that no fluctuations in output potential occur as a result of load
fluctuations.Furthermore, the individual output voltages cannot be adjusted.
Table2-2:
Output
voltage
+ 3.3V
+ 5V
+ 7V
- 7V
+ 13V
+ 18V
Output voltage
accuracy
± 0.2V
± 0.25V
± 0.55V
± 0.55V
± 1.3V
± 1.6V
Ripple
100mvpp
100mvpp
400mvpp
400mvpp
800mvpp
500mvpp
Ripple +
Spike
100mvpp
100mvpp
400mvpp
400mvpp
800mvpp
500mvpp
Output current (A)
MIN
0.01
0.05
0.0
0.0
0.0
0.0
MAX
1.0
1.3
0.9
0.2
1.2
0.3
Load capacitor
(Reference)
Overcurrent Overvoltage
Interrupt + 4.6V
220µF
Interrupt + 7V
220µF
100µF
100µF
47µFX2
47µFX2
Protection circuit
• A cooling fan is provided in order to extract the heat that is generated inside the power supply
unit. The heat that is extracted by this cooling fan is dissipated outside the projector by the air
exhaust fan that is connected to connector CN901 on the MA board.
27
LPX-500
LPX-500
(3). Connector/Pin layout
CN2100
24
13
1
12
Figure 2-10
Pin layout for power supply connector (connected to CN2100 on MA board)
1
2
3
4
5
6
7
8
9
10
11
12
28
PWON
GND
+13V
+13V
GND
-7V
GND
+7V
+5V
+3.3V
GND
+18V
13
14
15
16
17
18
19
20
21
22
23
24
GND
GND
+13V
+13V
+13V
GND
GND
+7V
+5V
+3.3V
GND
GND
LPX-500
LPX-500
2.3. BALLAST UNIT
The ballast unit re-regulates the ballast DC power supply (300-400 V DC/0.4 A) which comes from the
power supply unit in order to generate the AC power supply (45-120 V AC) for the UHE lamps.
Ballast output connector (Connects to
lamp inner housing)
CB2
(Connects to MA board)
CB1
(Connects to power supply unit)
Figure 2-11
Block diagram
Fuse (4AF)
Filter/Buffer
CB1-3
+
V DS
280-400
Vdc
(operating)
Down
converter
CB1-1
Power supply
Projector set
Full
bridge
Ignition
circuit
Lamp
UHP 150W
Control Circuitry
Comm. Interface (opto
- isolated)
Int.
supply
Analogue
Control
+interfacing
mControl
(Digital)
CB2-3
4
5
SCI
RxD
1
2
Flag/ TxD
Communication Interface Projector set
Figure 2-12
(1). Operating principles
• Sub power supply
:
• Switching circuit
:
• Regulator circuit
• Detection circuit
:
:
Generates the voltage (+300 V/+400 V) for the control circuit inside the
ballast unit.
Carries out switching operations for re-regulation based on the MA
board output signal (BACTA). (The BACTA signal turns the ballast
output on and off.) It changes the switching duty (adjusts the output
voltage) based on the feedback signal from the detection circuit.
Generates the AC45-120 V lamp voltage.
Monitors the regulator circuit, and generates a feedback signal for
stabilizing the output voltage and detects the output current. If the lamp
in the lamp inner housing blows (if the load current for the ballast output
disappears), it sends a LPSTC signal to the MA board.
29
LPX-500
LPX-500
2.4. MA BOARD
The MA board carries out the core circuit control for the projector. It consists of circuits such as a
resizing processor (main CPU), power supply and I/O controller, digitizer (ADC, video amplifier, etc.),
RAM and EEPROM.
The MA board carries out all control operations except for display signal generation and audio and
video interface control. The MA board is regarded as a single unit for servicing purposes.
The diagrams below show the appearance of the MA board.
(Front)
Figure 2-13
(Back)
Figure 2-14
* The MA board is supplied with the optical engine as a single service unit.
30
CN901
Lamp cover
detection switch
CN2102
Ballast Unit
IC903
CN907
Control panel
IC910
Rear RC Reciver
IC2000
Front RC Reciver
LMPON
KIN/OUT
IRBAK
CN1101
LAMP Fan
CN1100
EX Fan
CN1103
LV Fan2
CN1102
LV Fan1
DETLH
IC2300
DR CPU
IC1201
J900
WIERD
REMMOTE
IC902
PSCI
IC1101
IC1100
IC1103
IC1102
TMPLH
FCTL00
CN1105
LED[5~0]
LAMP Thermistor
CN1200
RS-232C
IC800
PWD[15~0]
LED Control
TMPLV
DETLV
R/G/BDO[7~0]
I/F
IC1700
CN510
IC1701
Graphics Port
Video Port
Display Port
Microprocessor Interface
Miscellaneous
Peripheral Interface
SDA_D/SC_D
DDAN
CN100
PC IN
GBO/E[7~0]
GGO/E[7~0]
IC1701
IC1601
IC105
IC107
IC112
IC300
IC406
CN2100
CN101
DVI-I
Power supply unit
IC1700
IC1600
IC1501
DEC Driver
IC1500
GRO/E[7~0]
PWON
R/G/BC1[9~0]
IC1400
GAUGE4
IC700
PW164A-10TK
D[15~0]
CN1104
L/V Thermistor
IC1900
G,B
IC1800
R
L/V
R L/V
0.9 Wide/0.9 SVGA
B L/V
0.9 Wide/0.9 SVGA
G L/V
0.9 Wide/0.9 SVGA
LPX-500
LPX-500
MA Board Circuit Block
Figure 2-15
31
LPX-500
LPX-500
Operating principles
• IC902 (power save controller) and peripheral circuits on the MA board are backed up by the
+3.3 V voltage from the power supply, and the power supply control signal line is backed up by
the +5 V voltage. (If the power cord is still connected to the projector after the power is turned
off, the +3.3 V and +5 V backup biases are still supplied.)
• When the power is turned on, the reset signal which is being controlled by the power save
controller (IC902 on MA board) is canceled, and the CPU loads the program stored in the mask
ROM and writes it to the SRAM. After this, settings are carried out in accordance with the
program until the initial screen (NO SIGNAL display) appears.
• The two thermistors (L/V thermistor and LAMP thermistor) detect the temperature. If the
temperature rises above a certain level, the thermistor signal passes via the MA board and
applies an interrupt to IC902, so that fan operation changes and power supply is stopped.
• In order to display images, the received data is first stored in the SRAM. The SRAM data is
then re-read by the resizing processor (main CPU).
• The video input (S-Video/Video IN) signals are supplied via the IF board. These signals are
converted to digital signals by the chroma processor and are then stored in the SRAM.
MA BOARD
RC Receiver Cable
Control Panel
LAMP Fan
Intake Fan 1
Power Supply Unit
Intake Fan 2
Light Valve
L/V Thermistor
Exhaust Fan
LAMP Thermistor
Board to Board
SCI Cable
Figure 2-16
32
LPX-500
LPX-500
2.5. CONTROL PANEL
The control panel has 13 buttons, and is connected to connector CN908 on the MA board.
Figure 2-17
q [MENU] button
The environment setting menus turn on and off
each time the [MENU] button is pressed.
w h and g buttons
i [INPUT] button
Switches the input source between INPUT A →
INPUT B → D4 VIDEO → S VIDEO → VIDEO
DVI each time the button is pressed.
Press to select an item in an environment
setting menu or help menu.
Press and hold the [SHIFT] button while
pressing these buttons to correct keystone
distortion of images.
o [PATTERN] button
e
!0 [ASPECT] button
button
Displays the line menu.
button while viewing an
Pressing the
environment setting menu or the online help
selects the menu item and proceeds to the next
display.
Projects a test pattern for image adjustment.
The test pattern switches between Crosshatch →
Grayscale Pattern → Off each time the button is
pressed.
Selects the aspect ratio for projected images from
one of five settings. The aspect ratio switches
between Normal → Squeeze → Zoom → T.B.D. →
Through → Squeeze Through each time the button
is pressed.
!1 [PICTURE MODE] button
r
indicator
Flashes or lights to indicate the operating status
of the projector.
Switches the color mode between A → B → C →
PC → sRGB each time the button is pressed.
t [STANDBY/ON] button
!2 [ESCAPE] button
y LAMP/COVER indicator
Pressing [ESCAPE] while viewing an
environment setting menu or the online help
displays the previous screen or menu.
Indicates a problem with the projection lamp or that
the lamp needs to be replaced.
!3 – and + buttons
u TEMP/FAN indicator
These buttons select adjustment values in
environment setting menus and the online help.
Indicates an abnormality in the internal projector
termperature.
!4 [SHIFT] button
Press to turn the projector power on and off.
The button does not function by itself. Press
and hold this button while pressing the h
button or the g button to correct keystone
distortion of images.
33
LPX-500
LPX-500
2.6.IF BOARD
This circuit board includes interface connectors, audio control circuits and a chroma processor so that
external sources such as video equipment and computer audio signal sources can be connected to
the projector. The IF board is equipped with the following connectors.
• S-Video
(S-video input: Y/C signals)
• Video
(Video source image input : CVBS signals)
•Y
(Video source image input : Component signal)
Cb/Pb
Cr/Pr
Figure 2-18 shows the circuit block diagram for the IF board.
Separat sync
MPX(LPF)
CVBS
CVBS
CVBS
S-VIDEO
Separst3D-Y/C
C
Y
C
TC90A65F
Y/G
3RCA
Cr/R
Cb/B
Y/G
Cr/R
Cb/B
DVI -A
Y
Y/G
Y/G
Cr/R
Cr/R
Cb/B
Cb/B
C
CVBS/Y
C/Cr
Cb
MPX
MPX
AMP
G 1/R 1/B 1
DVI
VIN2
VIN3
CIN
VIN4
VIN1
PW164A
Video chroma decoder VPC3230D
ITU -R601
MPX
Vport
IP Conversion
FLI2200
DSUB15P
MPX
ADC
AMP
THC7116
Color conversion
ITU -R601
Gport
PIGMON
Figure 2-18 IF Board Block Diagram
The S-Video and Video interface signal line has a chroma processor which converts the signals to
digital format and outputs them from the MA board.
34
LPX-500
LPX-500
IF BOARD
Board to Board
Figure 2-19
2.7. RC RECEIVER SENSORS
These are elements which are used to detect (receive) the infrared signals that are transmitted from
the remote control. The RC receiver sensors are located at the right of the front and at the rear of the
projector.
RC Receiver Sensor (rear)
RC Receiver Sensor (right of the front)
Figure 2-20 RC Receiver Sensors
35
LPX-500
LPX-500
The output signals (serial data) that are received by the receiver sensors are connected to the power
save controller (IC902) on the MA board.
The MA board uses the serial data received from the remote control (from the button switches
in the remote control) to control the power ON/OFF status, the operation of menus, and to
control the image display and sound volume.
The control block is shown in Figure 2-21.
(Rear)
MA board
IC910
Infrared signals
IC902
PSCI
CN902
Remote control
CN2000
IC2000
PJ130RC board
(Front)
Figure 2-21 Remote Control Circuit Block Diagram
RC RECEIVER BOARD
RC Receiver Cable
Figure 2-22
36
LPX-500
LPX-500
2.8. TEMPERATURE CONTROL
2.8.1. Sensors and Switches
This projector is equipped with the devices shown in the table below in order to protect the safety of
the operator and maintain general safety with regard to the projector itself (by preventing abnormalities
in operation).
Table 2-3:
Name
Lamp cover detection switch
Installation position/Type
MA fixing plate R
LAMP thermistor
Exhaust fan (thermistor)
L/V thermistor
Above prism (thermistor)
Function/Application
Interrupts AC power supply when
the lamp cover is open (power
cannot be turned on).
Prevents temperature buildup
around the lamp inner housing. If
the temperature rises above a
certain level, the lamp is turned off.
Prevents temperature buildup
around the light valves. If the
temperature rises above a certain
level, the lamp is turned off.
(1). Lamp cover detection switch
This switch is installed to MA fixing plate R, and moves in conjunction with the lamp cover latch. If
it were possible to turn on the power while the lamp cover was still open, the lamp would turn on
and generate high temperatures. This cover is normally opened when the operator is replacing the
lamp inner unit, and so the switch is provided in order to prevent the danger of injury from burns
that could occur if the lamp turned on accidentally.
Figure 2-23
The lamp cover detection switch is positioned along the AC input line for the power supply unit.
Accordingly, when the lamp cover is opened, the AC supply to the power supply unit is interrupted,
so that the power cannot turn on.
(2). Thermistor and temperature sensor operation
IC2300 on the MA board samples the temperatures (resistances) at the two thermistors at intervals
of 100 ms. The two thermistors are located inside the projector, and mainly detect the temperature
of the optical block. The CPU controls the fan operation and power supply shut-down as shown in
the following table based on the measurement results.
37
LPX-500
LPX-500
Table 2-4
Condition
Normal temperature
Warning temperature
Abnormal temperature
TEMP/FAN indicator
Off
Flashes orange
Lights red
Flashes red
Meaning
Normal operation in progress
If temperature rises any higher, projection
stops.
Overheating (no projection)
Problem with fans, thermistors or
temperature detection circuit
*Refer to 2.8.2 for a detailed description of fan operation.
*Refer to 2.8.3 for a detailed description of the TEMP/FAN indicator.
(1).LAMP thermistor
The LAMP thermistor detects the temperature of the lamp. In order to prevent damage to the
surrounding area as a result of the lamp inner housing overheating, the power controller on the MA
board gives a warning by means of the TEMP/FAN indicator when the temperature rises above a
certain level, while turning off the supply of power to the ballast unit (lamp power supply).
(2).L/V thermistor
This thermistor is secured to the shutter frame at the top of the prism. If the air filter frame at the
bottom of the projector (a consumable part which can be replaced by the user) becomes blocked
and sufficient cooling is not possible, the CPU on the MA board uses the LAMP/COVER indicator
to give a warning and interrupts the supply of power to the ballast unit (lamp power supply) in
order to protect the lamp panels (LCD panels) which can easily become damaged by high
temperatures.
L/V thermistor
LAMP thermistor
Figure 2-24 L/V Thermistor and LAMP Thermistor
38
LPX-500
LPX-500
2.8.2.FAN OPERATION
There are four fans inside the projector. These fans discharge heated air from the projector in order to
prevent problems with circuit operation and component damage resulting from overheating. (It is
mainly the lamp inner housing, power supply unit and ballast unit that generate heat.)
Lamp fan
Figure 2-25 Rear of Optical Engine
Exhaust fan
Figure 2-26 Exhaust Fan
Intake fans
Figure 2-27 Intake Fans
39
LPX-500
LPX-500
(1). Fan control circuit block
DR-CPU
DAC
M62367
DACLD
LD
DACDI
DACCLK
DI
SK
AO1
LVFAN 1
DRIVER
FANON
LV1FANDET
AO2
AO8
LVFAN 2
FANON
LV2FANDET
EXFAN
DRIVER
FANON
I2C- BUS
EXFANDET
PW FANDET
(PSCI)
L MPFAN
DRIVER
FANON
LMPFANDET
FANON
Figure 2-28
(2). Operation control
• The MA board is connected to two thermistors (the L/V thermistor and the LAMP thermistor). The driver
CPU controls the operation of the four fans (intake fans, exhaust fan and lamp fan) based on the
temperatures detected by the thermistors.
• The signals that are output by IC2300 (driver CPU) on the MA board are used to change the output
from the fan drive circuit (regulator) on the MA board in order to control the intake fans and exhaust
fan. (The fans can be controlled in three modes: stopped, low speed and high speed.)
• The feedback signals from the fans are used by the CPU to monitor the operation of the fans (stopped
or running) for any abnormalities. If the feedback signal indicates a condition which the CPU does not
expect, the CPU judges that there is an abnormality in the operation of the fan and immediately turns
off the lamp and causes the TEMP/FAN indicator to light red.
• The fan at the power supply unit operates at high speed or low speed based on the FANCL signal
which is generated by IC902 (PSCI) on the MA board.
(3). Fan operation
(During standby)
When the thermistor detects a temperature that is at the low speed operation setting temperature or
higher, the fan power supply turns on and the intake fans and exhaust fan operate at low speed.
When the thermistor detects a temperature that is lower than the low speed operation setting
temperature, the intake fans and exhaust fan stop.
(When lamp is on)
The intake fans and exhaust fan start operating 0.5 of a second before the lamp turns on. After this,
the fans operate at high speed or low speed based on the temperatures detected by the thermistors.
(When cool-down is in progress)
When the lamp turns off, the fans continue operating for 5 minutes.
40
LPX-500
LPX-500
2.8.3. LED INDICATORS
The control panel has three LED indicators which show the operating status of the projector.
LAMP/COVER indicator
TEMP/FAN indicator
indicator
Figure 2-29
The following tables show what the indicators mean and how to remedy problems that they indicate.
•
indicator
Indicator status
Orange
Projector status
Standby condition
Flashing orange Cool-down in progress
Green
Flashing green
Projecting in progress
Warm-up in progress
Red
Flashing red
Off
Internal problem
Initial cool-down function working
Power is off
Problem and remedy
(No abnormality)
Projection starts when the [STANDBY/ON] button is pressed.
(No abnormality)
Wait for a short while.
The cool-down (lamp cooling operation) period will vary
depending on the external air temperature.
The main power supply switch should not be turned off unitl the
lamp has cooled.
When a main power supply switch is turned off in the middle of
coolingdown, after a lamp gets cold enough (it takes about 1
hour), please turn on a main power supply switch.
(No abnormality)
(No abnormality)
Wait for a short while. The indicator will stop flashing and light
with a green color.
Problem with MA board, optical engine or power supply unit.
(No abnormality) Wait for a short while.
• Check the power cord connection.
• Check the power supply at the electrical outlet.
• Press the [STANDBY/ON] button to turn on the projector.
41
LPX-500
LPX-500
• LAMP/COVER indicator
Indicator status Projector status
Red
Lamp needs to be replaced.
Flashing red
Problem with lamp
Flashing orange Lamp will soon need
to be replaced.
(2900 hours)
Off
Problem and remedy
Replace the lamp with a new one.
Replace the lamp with a new one.
When replacing the lamp, check that the lamp and the lamp cover
are securely installed. If the lamp or the lamp cover are not
securely installed, the projector power will not turn on.
Have a new replacement lamp ready.
The lamp service life can become shorter than normal as a result of
the usage conditions, and so the lamp should be replaced as soon
as possible
(No abnormality)
The power is not turned on, or the projector is operating normally.
• TEMP/FAN indicator
Red
High temperature
inside projector
(overheating)
Flashing red
Internal problem
Flashing orange High-speed cooling
in progress
Off
42
Problem and remedy
The lamp will turn off automatically and projection will stop. Wait for
about 5 minutes without operating the projector. After 5 minutes
have elapsed, the projector's cooling fans will stop. Once the
cooling fans have stopped, unplug the power cord and then plug it
back in again.
If the projector overheats, check the following two points.
• Is the installation location well ventilated?
Check that the air inlet and air outlet are clear, and that the
projector is not positioned against a wall.
• Is the air filter blocked with dust?
If the air filter is dirty, it should be cleaned.
When the power cord is plugged back in, it will return to its
previous state, so press the [STANDBY/ON] button to turn it back
on. If the projector continues to overheat even after the above
points have been checked or if the indicators show a problem when
the power is turned back on, there is a problem with the optical
engine, lamp inner housing, L/V thermistor, LAMP thermistor, power
supply unit or ballast unit.
There is a problem with the air filter, intake fans, exhaust fan, L/V
thermistor, LAMP thermistor, power supply unit, ballast unit, lamp
inner housing, optical engine or MA board.
(This is not an abnormality, but if the temperature rises too high
again, projection will stop automatically.)
• Set the projector up in a place that is well-ventilated and ensure
that the air inlet and exhaust vents are clear.
• Clean the air filter.
(No abnormality)
The power is not turned on or the projector is operating normally.
LPX-500
LPX-500
3.1. BEFORE CARRYING OUT TROUBLESHOOTING
1. If repairs involving the replacement of blocks or components have been carried out, always be
sure to re-check whether the replacement parts themselves are operating correctly or not (in order
to determine whether the problem is the result of something such as a loose connector).
2. All instructions and procedures listed in troubleshooting flowcharts should be carried out as given.
3. Follow the procedures given in Chapter 4 - Disassembly and Assembly when replacing any of the
projector components.
4. When checking the operation of the projector, always check whether the connectors are connected
securely before proceeding to other checks.
3.1.1. Troubleshooting Tools and Equipment
The following tools and equipment will be required in order to carry out troubleshooting, so make sure
that they are on hand.
Table3-1
Name
Projection screen
Tape measure (3 m)
Host computer
Video equipment
Multimeter
Double-sided tape
General tools
Qty.
1
1
1
1
1
Short length
1 set
Application/Other
Projecting images
Measuring projection distances
Transmitting audio and display data
Transmitting audio and image data
Measuring resistance values and voltages (AC/DC)
Attaching parts
Tools and equipment listed in Chapter 4 Section 4.1.
3.1.2. Field Replacement Parts
• If replacing projector parts in the course of troubleshooting, replace the whole service unit which
contains the part that needs to be replaced.
• The optical engine (comprising the light guide unit, optical head unit, projection lens unit and
prism unit) and the MA board form a single service part. Accordingly, the individual components
should not be disassembled or be replaced with other components (because the components have
all been adjusted with respect to each other).
• Carry out the safety tests after parts replacement is completed.
43
LPX-500
LPX-500
3.2. ENTRY
Check the nature of the problem using the following flow diagram, and then proceed to the
corresponding flow chart (on the following pages).
START
External check
• External checking
Check for any external abnormalities (such as damaged cover)
Internal cable
connections
• Internal cable check
Remove the upper case and check the cable connectors on the MA board.
(Reconnect if required.)
Main power supply
switch ON/OFF
Power ON/OFF
• Main power supply switch ON/OFF
Connect the power cord and turn on the main power supply switch.
After main power supply switch is turned on, the
indicator lights green and the
projector is in standby.
After the main power supply switch is turned off, all projector functions and indicators
go off.
• Power ON/OFF/Initialization
Turn on the main power switch and turn on the power. Check the initial operations
until the “NO SIGNAL” message appears, and then check the power off operation.
1). After power is turned on, the
2). After about 30 seconds the
maximum brightness.
Screen display/Image
quality
Control panel
Remote control
operation
Other
44
indicator flashes green and projection starts.
indicator lights green and projection starts at
• Display input/output and image quality (use the [INPUT] button to change input)
Check the quality of input and output signals from computer, S-Video and Video
sources. Carry out the following steps first.
1). Check the projection position adjustment with the front and rear feet and the
projection distance.
2). Adjust the image using the zoom ring and focus ring.
• Control panel button operations
Check the functioning of each button on the control panel.
• Remote control operation (First set the R/C switch to ON.)
Check the functioning of each button on the remote control.
• Other
Abnormal noise, overheating, image problems, problems with low reproducibility.
LPX-500
LPX-500
3.2.1.External Checking
START
Upper Case Unit
Control Panel
Projection Lens Unit
• There should be no damage, deformation or cracking from the projector being dropped.
• The lower case unit should be installed correctly.
• The front remote signal receiver should be clean and should not have any
foreign materials (such as tape) attached.
• Air vents should be clean.
• Upper case should be installed correctly.
• No buttons should be stuck down.
• Focus ring and zoom ring should turn smoothly.
• Lens should be clean and free from damage.
Lower Case
• There should be no damage, deformation or cracking from the projector being
dropped.
Air Filter
• Air filter frame should be installed correctly.
• Filter should be clean (remove the air filter frame from the lower case to check).
• Air intake fan underneath air filter should be clean.
Lamp Cover
• Lamp cover should be securely attached to upper case unit.
• Lamp cover safety switch latch should be free from damage (remove the lamp
cover to check).
Lamp Inner Unit
• Plastic frame should be free from any deformation or heat damage (discoloration)
(remove the lamp inner housing to check).
• Power supply connector should be free from discoloration.
• Clear glass surface of lamp should be clean.
Front Adjustable Foot
Unit
Interface Connectors
Main power supply switch
/ AC Inlet
• Foot knob should turn smoothly to adjust the height.
• Connectors and terminals should not be bent or discolored.
• Connectors and terminals should be free from foreign particles.
• Connector terminals should not be discolored.
• Socket should be free from damage.
• The main power supply switch works normally.
Air Filter Frame/Lamp
Inner Unit/Lamp Cover
Installation
45
LPX-500
LPX-500
3.2.2. Internal Cable Check
Turn off the power supply and disconnect the power cord before starting these checks.
START
Upper Case Unit Removal
Control Panel
•MA board CN908 (lock-type connector)
RC Receiver Sensor
•RC board CN2000 ↔ MA board CN902
Exhaust Fan
•MA board CN1100
LAMP Thermistor
•MA board CN1105
Intake Fans
R/G/B Light Valves
L/V Thermistor
Ballast Unit
•MA board CN1801/1901/2001 (lock-type connector)
•MA board CN1104
•Ballast unit ↔ Optical engine
•MA board CN2101
Power Supply Unit
•MA board CN2100
•MA board CN901
Lamp Fan
•MA board CN1101
IF Board
Upper Case Unit Installation
46
•MA board CN1102, CN1103
•IF board CN3002 ↔ MA board CN510
LPX-500
LPX-500
3.2.3. Power Supply ON/OFF
START
Press the [STANDBY/ON]
button on the control panel.
Does the
indicator flash green?
No
Press the [STANDBY/ON]
button on the remote control.
Replace the power cord.
Yes
No
Does the
indicator flash green?
Is the AC power supply
voltage normal?
No
Yes
Yes
*1
Replace the MA board
and optical engine.
Replace the operation
panel.
START
*2
Yes
Does the power supply
unit fan operate?
No
Is the AC power supply
voltage normal?
No
Replace the power supply unit.
Yes
Yes Does the power supply
unit fan operate?
No
Does the exhaust fan
operate?
No
and optical engine.
Replace the exhaust fan.
Yes
Does the exhaust fan
operate?
No
and optical engine.
No
and optical engine.
Yes
Do the intake fans
operate?
No
Replace the intake fans.
Yes
Do the intake fans
operate?
Yes
A
To next page
*1 Malfunction of indicator
*2 Because the power supply unit also includes a power supply fan.
47
LPX-500
LPX-500
Continued from previous page
A
Is the lamp turned on?
No
Is the LAMP/COVER
No
indicator lit or flashing red?
Yes
Does the TEMP/FAN
indicator flash orange?
No
Yes
Replace the lamp.
Yes
Does the TEMP/FAN
indicator light red?
Yes
A
Is the
lit green?
indicator
No
and optical engine.
Yes
Clean the fans (intake fans,
exhaust fan, lamp fan,
power supply fan) and air
filter.
Is the TEMP/FAN
indicator off?
No
Yes
A
Are the LAMP/COVER
No
indicator and TEMP/FAN
indicator off?
Refer to table on next
page to repair.
Replace the LAMP thermistor.
or
Replace the L/V thermistor.
or
Replace both thermistors.
Yes
Press the [STANDBY/ON] button
(to turn off the power).
Is the TEMP/FAN
indicator off?
No
Yes
A
Does the
indicator flash orange?
No
and optical engine.
and optical engine.
Yes
Does the
indicator light red?
Yes
Are all indicators off?
Yes
To “Display input/output
and image quality”
48
No
Problem with a fan or thermistor.
Replace in the following sequence.
1. MA board, optical engine
2. Power supply unit (LAMP thermistor)
LPX-500
LPX-500
<LED indicator meanings>
Table3-2 :
indicator
1
Indicator status
Orange
Projector status
Standby condition
2
Flashing orange
Cool-down in progress
3
Flashing red
Internal problem
Probable cause
If the indicator continues like this, there is a problem with the MA
board, optical engine or power supply unit.
If the indicator continues like this for an extremely long time, there
is a problem with the exhaust fan, LAMP thermistor or MA board.
Problem with the MA board, optical engine or power supply unit.
Table3-3 : LAMP/COVER indicator
1
Indicator status
Flashing orange
Projector status
Lamp will soon need
to be replaced.
2
Orange
3
Flashing red
Lamp needs to be
replaced.
Problem with lamp
Probable cause
If the indicator continues like this after the lamp inner housing is
replaced, there is probably a problem with the MA board.
If the indicator continues like this after the lamp inner housing is
replaced, there is probably a problem with the MA board.
Problem with lamp inner housing, power supply unit or ballast
unit.
Table3-4 : TEMP/FAN indicator
1
Flashing orange High-speed cooling
in progress
2
Red
Overheating
3
Flashing red
Internal problem
Probable cause
If the indicator continues like this, there is a problem with the
optical engine, lamp inner housing, L/V thermistor, LAMP
thermistor, power supply unit or ballast unit.
<LED indication when LPX-500 operating normally>
Status
LAMP/COVER
TEMP/FAN
Power OFF
OFF
OFF
OFF
Standby state
Orange ON
OFF
OFF
Initializing state
Green flashing
OFF
OFF
Warm-up state
Green flashing
OFF
OFF
Image state
Green ON
OFF
OFF
Cool-down state (ready for power ON)
Orange flashing
OFF
OFF
Initial cool-down state (not ready for power ON)
Red flashing
OFF
OFF
49
LPX-500
LPX-500
3.2.4. Display input/output and image quality
START
Yes
Does an image appear
on the screen?
Does "NO SIGNAL"
appear in the bottom-left
of the screen?
No
Yes
No
and optical engine.
No
Replace the lamp inner
housing.
Yes
1).Adjust the height using
the front adjustable
foot.
2).Press the [ h/g ]
buttons to correct
distortion.
3).Adjust the focus.
Does the image appear
clearer?
Yes
No
Clean the projection lens.
No
Is the LAMP/COVER
indicator lit or flashing red?
Does the image appear
clearer?
Yes
No
No
and optical engine.
Replace the ballast unit.
Yes
No
Replace the power
supply unit.
To next page
Caution
• The image quality can also be affected by condensation and by a dirty lens. If condensation forms,
the problem will correct itself naturally if the projector is left to stand for a while.
50
LPX-500
LPX-500
Continued from previous page
A
Connect a computer to
the Computer In
connector and input an
image signal.
Does an image appear on Yes
the screen?
Is the image quality good?
No
Connect a monitor to the
Computer Out interface.
Yes
Connect a source to the
following interfaces.
1. Video 2. S-Video
Does an image appear?
Does a picture appear on Yes
the monitor?
Yes
No
No
Press the [INPUT] button
to change the display to
“Computer”.
the screen?
and optical engine.
No
Connect a source to the
interface to be checked.
the monitor?
A
No
No
Replace the IF board.
the screen?
No
and optical engine.
Replace the monitor cable.
Press the [AUTO] button.
Is the image quality good?
No
1).Press the [MENU]
button.
2).Select the “Video”
menu.
3).Adjust the brightness
and contrast.
Yes
the monitor?
No
Replace the monitor.
To “Audio Output”
51
LPX-500
LPX-500
3.2.5. Control panel
START
Can the power be turned off by
No
pressing the [STANDBY/ON]
button?
Re-connect CN908 on
the MA board.
Is the computer image
No
automatically adjusted
and optimized when the
[ h/g ] button is pressed?
No
Yes
Yes
Does the input source
change between the INPUT
A, INPUT B, D4 VIDEO, S
VIDEO, VIDEO, DVI
connector when the [INPUT]
button is pressed?
No
Yes
Does the input source
change between the aspect
5 mode when the [ASPECT]
button is pressed?
No
Does the adjustment test
pattern change when the
[PATTERN] button is
pressed?
Yes
Does the color mode
change between (A, B, C,
PC, sRGB) when the
[PICTURE MODE] button
is pressed?
Yes
Yes
Does the menu appear and
disappear when the [MENU]
button is pressed?
To “Remote Control”
No
Yes
Does the current function
stop or does the previous
No
screen or menu appear
(when using the on-screen
menus or help) when the
[ESCAPE] button is pressed?
Yes
Is the keystone adjusted
when the [ h/g ]
buttons are pressed?
No
Yes
Does the menu appear and No
help appear when the [
]
buttons are pressed?
Yes
52
Yes Do all switches function
normally?
No
Replace the upper case
unit.
Yes Do all switches function
normally?
No
and optical engine.
LPX-500
LPX-500
3.2.6. Remote control operation
START
Can the power be turned
on and off using the
remote control?
Yes
Replace the remote
control
Replace the remote
control battery.
Yes
No
and optical engine.
Do all buttons operate
normally?
No
and optical engine.
Yes
No
Yes
Does the remote control
work from about 10 m
away from the front or
rear of the projector?
Yes
No
Yes
Replace the RC receiver
board.
remote control?
Replace the remote
control battery.
Replace the remote
control.
remote control?
No
Yes
No
No
remote control?
No
Do all buttons operate
normally?
Replace the RC receiver
board (front).
and optical engine (rear).
Yes
Yes
No
Replace the remote
control.
No
and optical engine.
53
LPX-500
LPX-500
3.2.7. Other
START
Is the projector making
any abnormal noise?
Yes
Check for any foreign particles around the exhaust fan, intake fans and
power supply unit fan.
The cause might be a malfunction of the power supply unit (pulse transformer
vibration, etc.).
Yes
Malfunction of L/V thermistor or LAMP thermistor.
Malfunctioning or dirty exhaust fan, intake fans, lamp fan or power supply
unit fan.
Dirty air filter.
Malfunction of optical engine.
Yes
Malfunctioning or dirty light guide unit (lenses, mirrors, etc.)
(malfunction of optical engine).
Dirty projection lens (malfunction of optical engine).
Malfunctioning or dirty light valve in head unit (malfunction of optical engine).
Malfunction of MA board.
Yes
Problem with AC power supply.
Malfunction of power supply unit (voltage fluctuation, low voltage, outage, etc.).
Malfunction of MA board.
Malfunction of IF board.
Poor cable connection.
No
Is the projector
overheating?
No
Are there any image
problems?
No
Does the problem have
low reproducibility?
54
LPX-500
LPX-500
4.1. DISASSEMBLY AND ASSEMBLY
This chapter describes the procedures for disassembling and assembling the main components of the
LPX-500 projector.
Except where indicated separately, all procedures for re-assembly should be carried out by following
the disassembly procedures in reverse.
(1). Preparation
1). Take off any metallic objects such as wristwatches, shirt cuff buttons, rings and tie pins that may
pose a danger of coming into contact with the projector.
2). Always wear gloves when disassembling and reassembling the projector.
3). When disassembling and assembling the projector, always use a grounding strap and a grounding
mat.
4). Turn off the power for both the projector and the host computer before connecting them.
5). Disconnect the power cord from both the projector and the electrical outlet.
6). Disconnect all interface cables that are still connected.
7). Use a vacuum cleaner to clean the air filter, interface panel and outer case.
(2). Tools and Equipment
The tools and equipment in the following table will be needed, and should be made ready beforehand.
Name
Phillips screwdriver No. 2 (20 cm)
Qty.
1
1
No. 2 Phillips screwdriver (20 cm)
with 4 mm or less shaft diameter
Allen key
1
Hexagonal box screwdriver (5 mm)
1
Tweezers
1
Brush
1
Vacuum cleaner
1
Small amount
Lens cleaner
Air blower
1
Gloves
1
Grounding strap
1
Commercially available
Application/Other
Yes
Disassembling the outer case and inner components
Yes
Disassembling the exhaust fan
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Disassembling the outer case and inner components
Removing the computer interface
Removing FPC cables
Cleaning away dust
Cleaning away dust
Cleaning the projection lens
Cleaning the light valves and fans
(3). Points to note when working (handling the optical engine)
Detailed descriptions of the procedures for disassembling the mechanism are given in Section 4.2.
However, the optical engine is a single service part. Accordingly, the units in the table below
(comprising the optical engine) should be treated as a single part for the purposes of ordering and
asking YAMAHA for repair work to be done. The component parts of the optical engine in the table
below require mechanical position adjustments and storage of electronic correction values (image
adjustment data) in the control circuits to be carried out.
1)
2)
3)
4)
Optical head unit
Prism unit
Light guide unit
Projection lens unit
These units are collectively termed the “optical engine”. (They should
be treated as a single replacement part for field maintenance
purposes.)
* Do not disassemble the optical engine.
* Do not replace the component parts of the optical engine/MA board with other parts.
55
LPX-500
LPX-500
(3-1). Mechanical Adjustments
1). Optical head unit
Polarization plates (R, G and B) installation positions (height, lateral position, parallelism) are
adjusted at the time of shipment from the factory.
(If the position adjustments of the R, G and B polarization plates are changed, color shifts will
occur and the a lack of image clarity will result.)
Caution
Do not twist the polarization plates or subject them to any other kind of mechanical stress.
2). Prism unit
The position of the prism unit (the degree of parallelism with the projection plates) is preset before
shipment from the factory in order to integrate the light that is output from the polarization plates
(R, G and B). If the position adjustment is changed, errors in the integration of the R, G and B
light components and shifting of the optical axes with respect to the projection lens unit will occur,
and this can cause problems with focusing some areas of the image and also cause color shifts
and lack of image clarity.
Caution
Do not loosen the prism unit mounging screws.
3). Light guide unit
The installation position for the light guide unit to the frame of the optical head unit (the degree of
parallelism and gap between the polarization plates (R, G and B) on top of the optical head unit)
is adjusted at the time of shipment from the factory. If the position adjustments are changed,
differences in color contrast (differences in the tint and brightness of localized areas of the screen
image) will occur and cause a lack of image clarity.
* The positions of the condenser lenses and mirrors inside the light guide unit are adjusted at the
time of shipment from the factory to provide the optimum quality of image display. If the positions
are changed or if the location where any given part is used is changed, screen image distortion
will occur and cause a lack of image clarity.
Caution
• If the positions of adjustment screws are changed or if the upper guide cover is removed from
the light guide unit, there is the danger that the positions of the lenses and mirrors might get
changed. Furthermore, dust may get inside the light guide unit. Because of these factors, the light
guide unit should never be disassembled.
• The LPX-500 is adjusted to extremely high levels of precision and field adjustments of the light
guide unit are not possible.
4). Control circuit adjustments
As described above, the optical system mechanism contains several locations where mechanical
adjustments are required. The control circuit (MA board) also possesses its own unique
characteristics (such as display signal output drivers) that differ from projector to projector. There
are also unique differences in each optical system mechanism (such as in the light valves). In
order to obtain the optimum display, it is necessary to eliminate these differences in electrical and
mechanical characteristics as well as to make mechanical adjustments. Because of this, the
various correction values are set at the time of shipment from the factory and are stored in a flash
ROM on the driver board. Accordingly, the optical system units (comprising the optical head, light
guide unit, prism unit and projection lens unit) is regarded as a single unit that is called the optical
engine.
56
LPX-500
LPX-500
At the time of shipment from the factory, the following data is stored in the flash ROM on the MA
board in accordance with the specifications of the projector's optical engine.
Gamma adjustment data
Flicker adjustment data
Ghosting adjustment data
Sub-contrast adjustment data
Color shade correction data
* Special tools and specialized technology are required to write the correction values into the
flash ROM. These adjustments cannot be carried out in the field.
(3-2). Points to note for repair work
When carrying out repair work, the following points must be observed at all times. If they are not
followed, the quality of the projector cannot be guaranteed and YAMAHA may refuse to accept the
projector for repair work to be carried out.
1). Do not disassemble the optical engine. (Do not loosen any of the mounting screws either.)
2). If any of the optical engine components develops a malfunction, the optical engine must be
replaced as a single unit. Furthermore, when returning parts to YAMAHA for repairs, the optical
engine should be sent as a single unit.
3). The optical system components are treated as a single unit (the optical engine). Therefore, the
individual components which make up this unit should never be installed as single components.
(For example, the prism unit must never be used by itself as a replacement for another prism
unit.)
(4). Points to note when working
Detailed points to note are given in each section, so be sure to read them thoroughly before
commencing work. Below are several general points which should be noted.
• When the projector is disassembled, the dust in and around parts such as the fans and air filter
may get transferred to other parts such as the R, G and B light valves which are the central part
of the display mechanism. This may have an adverse effect on the quality of projected images.
Accordingly, check whether any of the parts are dusty or dirty and use a vacuum cleaner to clean
them first before carrying out disassembly work.
• The optical engine and the circuit boards are very sensitive to static electricity. Place them inside
static-proof bags once they have been removed from the projector.
• When carrying out any of the following operations, check that there is no dust or dirt on the
respective components or on any lens and glass surfaces before installation. If any such
contamination is found, clean it off using isopropyl alcohol.
1. Optical engine removal
2. Lamp inner unit removal
3. Air filter frame removal
• The speaker unit contains a permanent magnet, so keep it away from any storage media such as
floppy disks and magnetic cards.
• The optical engine is very sensitive to vibration and shocks, so handle it with care.
• Do not disassemble any components (such as the power supply unit) which do not have express
disassembly procedures described in this Service Manual.
57
LPX-500
LPX-500
4.2.PROJECTOR DISASSEMBLY AND ASSEMBLY
The disassembly procedures for the LPX-500 projectors are explained below in the form of a
flowchart. Except where indicated separately, all procedures for re-assembly should be carried out by
following the disassembly procedures in reverse. Therefore assembly procedures have been omitted.
Detailed disassembly procedures for each component are given in Sections 4.2.1 to 4.2.17.
Do not disassemble the optical engine.
Projector
Lamp cover
(4.2.1.)
Upper case
(4.2.2.)
Lamp inner unit
(4.2.1.)
IF panel unit
(4.2.3.)
MA board unit
(4.2.4.)
MA fixing plate LF
(4.2.5.)
RC receiver unit (4.2.6.)
Optical engine
(4.2.7.)
Intake fans
(4.2.9.)
Intake duct unit
(4.2.8.)
MA fixing plate R
(4.2.10.)
(4.2.10.)
Exhaust fan unit
(4.2.11.)
LAMP thermistor
(4.2.12.)
Power supply unit
(4.2.13.) (4.2.15)
Ballast unit
(4.2.13.)
IF board assembly
(4.2.16.)
IF board unit
(4.2.14.)
IF fixing plate
(4.2.16.)
Lower case unit
Figure 4-1
58
Air filter
(4.2.17.)
LPX-500
LPX-500
4.2.1. Lamp Inner Unit
WARNING: The lamp will be hot immediately after use, and burns may result if it is touched. Wait for
it to cool down sufficiently before removing it.
1. Use the negative screwdriver to slide the LA lock lever at the side of the lamp cover. Then remove
the lamp cover.
2. Loosen the two screws (C.C.P-tite,Screw,3x20) that are securing the lamp inner unit.
3. Take out the lamp inner unit.
Lamp cover
Figure 4-2
Lamp inner unit
Screws
Figure 4-3
Caution
• The lamp inner unit will be warm immediately after the power is turned off, so be careful not to get
burned.
• Do not touch the glass surface of the lamp or otherwise allow it to become dirty.
59
LPX-500
LPX-500
4.2.2. Upper Case Unit
1. Remove the six screws (C.P.B-tite,Screw,4x10) and the three screws (C.B,Screw,3x6) that are
securing the upper case.
(C.B,Screw,3x6)
(C.P.B-tite,Screw,4x10)
(C.B,Screw,3x6)
Figure 4-4
2. Lift up the upper case and tilt it 90 degrees in the direction of the arrow. (Note that there is a
cable connected to the upper case unit.)
Upper case unit
Cable
Operation panel
Figure 4-5
60
LPX-500
LPX-500
3. Unlock connector CN908 on the MA board and then disconnect the control panel cable.
CN908
Locked
Unlocked
Figure 4-6
4. To remove the operation panel, insert a stick or the like through the hole in the back of the upper
case and push the operation panel. (Figure 4-5)
Caution
The operation panel once removed cannot be reinstalled. Be sure to use a new one instead.
4.2.3. IF Panel Unit
Remove the screw (C.B,Screw,3x6) that is securing the IF panel unit. Then remove the IF panel
unit from the lower case unit.
IF panel unit
Figure 4-7
61
LPX-500
LPX-500
4.2.4. MA Board Unit
1. Remove the five screws (C.C,Screw,3x6) from the MA Board unit.
Screw
MA Board Unit
Screws
Screws
Figure 4-8
2. Release the locks for the R, G and B light valve cable connectors.
Light valve B
Light valve R
Light valve G
Figure 4-9
Locked
Unlocked
Figure 4-10
62
LPX-500
LPX-500
3. Disconnect all of the R, G and B light valve cable and MA board cable connectors (10 in total).
CN902
CN1101
Caution
• Power cord routing
• Power cord twisted
2-3 times
CN901
CN1102
CN2100
CN1103
CN1104
CN1100
CN1105
CN2102
Figure 4-11
4. Remove the two screws (C.C,Screw,3x6) and then remove the MA board unit.
CN510
MA support plate
CN3002
Figure 4-12
Caution
When removing and re-installing the MA board, be careful of the CN3002 connector between the MA
board unit and the IF board unit.
63
LPX-500
LPX-500
4.2.5. MA Fixing Plate LF
Remove the MA fixing plate LF screw (C.B.P-tite,Screw,M3x8) fixing the MA fixing plate LF.
MA fixing plate LF
Screw
Figure 4-13
4.2.6. RC Receiver Unit
Remove the screw (C.C,Screw,3x6) that is securing the RC receiver unit. Then remove the RC
receiver unit from the MA fixing plate LF.
MA fixing plate LF
RC receiver unit
Figure 4-14
Caution
• RC receiver cable routing
RC receiver cable
64
LPX-500
LPX-500
4.2.7. Optical Engine
1. Remove the two screws (C.C.P-tite,Screw,3x8) that are securing the ballast power supply
connector.
2. Remove the four screws (C.P,Screw,3x8) that are securing the optical engine.
3. Lift up the optical engine to remove it.
Optical engine
Screws
Screws
Ballast power supply connector screws
Figure 4-15
Caution
Lamp fan cable routing
MA fixing plate R
Clamp
Lamp fan cable
Intake duct unit
Fix
Figure 4-16
65
LPX-500
LPX-500
Caution
When connecting the ballast output connector, check that the connector is facing the correct way
while referring to Figure 4-17.
Figure 4-17
Ballast output connector
4.2.8. Intake Duct Unit
1. Remove the two screws (C.B.P-tite,Screw,3x8) that are securing MA fixing plate R. Then remove
the MA fixing plate R.
2. Remove the three screws (C.B.P-tite,Screw,3x8) that are securing the intake duct unit.
3. Lift the intake duct unit straight up to remove it.
Intake duct unit
Screw
Screws
MA fixing plate R
Screw
Figure 4-18
66
LPX-500
LPX-500
4.2.9. Intake Fans
Remove the four screws (C.P(S-P1),Screw,3x35) that are securing each of the intake fans. Then
remove the intake fans.
Figure 4-19
Caution
• Intake fan cable routing
Figure 4-20
67
LPX-500
LPX-500
4.2.10. Lamp Cover Detection Switch
Remove the screw (C.P(S-P1),Screw,2.3x10) that is securing the lamp cover detection switch. Then
remove the lamp cover detection switch from the MA fixing plate R.
MA fixing plate R
Figure 4-21
Caution
• Lamp cover detection switch cable
routing
Fix
Figure 4-22
68
LPX-500
LPX-500
4.2.11. Exhaust Fan Unit
Remove the two screws (C.B.P-tite,Screw,3x8) that are securing the exhaust fan unit. Then remove
the exhaust fan unit.
Exhaust fan unit
Screw
Screw
Figure 4-23
4.2.12. LAMP Thermistor
Remove the screw (C.B.P-tite,Screw,3x8) that is securing the LAMP thermistor. Then remove the
LAMP thermistor.
LAMP thermistor
Screw
Figure 4-24
69
LPX-500
LPX-500
4.2.13. Ballast Unit and Power Supply Unit (1)
1. Remove the screw (C.B.P-tite,Screw,3x8) that is securing the thermistor and disconnect the cable.
2. Remove the four screws (C.B.P-tite,Screw,3x8) that are securing the power supply unit and ballast
unit. Then lift the power supply unit and ballast unit straight up together to remove them.
Power supply unit
Screw
Screw
Connector
Caution
• Thermistor
cable routing
Ballast unit
Thermistor
Screw
Screw
Screw
Ballast output cable
Figure 4-25
Caution
• Because the filter circuit assembly has not yet been removed from the projector, the power supply
unit cannot be completely removed from the projector at this point.
3. Remove the screw (C.C,Screw,3x6) that is connecting the power supply unit and the ballast unit.
4. Disconnect the connectors that are connecting the power supply unit and the ballast unit. Then
separate the power supply unit and the ballast unit.
Screw
Figure 4-26
70
LPX-500
LPX-500
4.2.14. IF Board Unit
Remove the two screws (C.B.P-tite,Screw,3x8) that are securing the IF board unit. Then remove
the IF board unit.
IF board unit
Figure 4-27
Screws
4.2.15. Power Supply Unit (2)
1. Remove the two screws (C.B.P-tite,Screw,3x8) that are securing the filter circuit assembly.
2. Remove the power supply unit from the projector.
Screws
Figure 4-28
71
LPX-500
LPX-500
4.2.16. IF Board Assembly and IF Fixing Plate
Remove the four screws (C.C,Screw,3x6) and the four screws (C.B.P-tite,Screw,3x8) that are
securing the IF board assembly. Then separate the IF board assembly and the IF fixing plate.
Screws
Screws
Screws
Screws
Figure 4-29
4.2.17. Air Filter
Pull the knob in the direction of the arrow to open the air filter.
Air filter
Figure 4-30
72
LPX-500
LPX-500
MEMO
73
LPX-500
LPX-500
Chapter 5 Parts List
5.1. EXPLODED VIEW
16-6
82
16
88
16-4
16-5
(with P.C.B. attached)
16-3
1
19
88
84
16-2
16-1
88
14
84
84
84
18
84
82
15
89
84
84
82
5-4
91
The lamp inner unit is not
supplied as a service part.
81
81
81
5-1
10-1
81
84
81
10-3
10-2
83
8
83
12-2
81
84
5-2
84
7
84
2-7
5-3
9
85
86
81
2-9
6-1
6-1
12-1
81
2-8
81
4-2
6
86
3-3
2-5
13
3-1
2-5
2-10
4-3
2-5
2-1
200-1
4-1
200
11
88
2-3
2-2
88
2-4
88
2-3
201
2-4
2-4
74
2-6
LPX-500
LPX-500
5.2. MECHANICAL PARTS
*
*
*
*
*
*
*
*
*
*
*
Z*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
Ref.
No.
PART NO.
1
2-1
2-2
2-3
2-4
2-5
2-6
2-7
2-8
2-9
2-10
3-1
3-3
4-1
4-2
4-3
5-1
5-2
5-3
5-4
6
6-1
7
8
9
10-1
10-2
10-3
11
12-1
12-2
13
14
15
16
16-1
16-2
16-3
16-4
16-5
16-6
18
19
81
82
83
84
85
86
88
89
91
AAX35480
AAX35420
AAX35330
AAX35340
AAX35320
AAX35350
AAX35130
AAX35430
AAX35440
AAX35450
AAX35530
AAX35590
AAX35070
AAX35290
AAX35110
AAX35360
AAX35050
AAX34960
AAX34970
AAX34980
AAX35460
AAX35470
AAX35040
AAX35380
AAX35010
AAX35030
AAX35060
AAX35080
AAX35180
AAX35610
AAX35170
AAX35300
AAX35190
AAX34950
AAX35120
AAX35000
AAX34990
AAX35090
AAX35100
AAX40710
AAX35390
AAX35410
V6004900
AAX35270
AAX35280
AAX35150
AAX35160
AAX35220
AAX35210
AAX35240
AAX35230
AAX34940
Description
OPTICAL ENGINE UNIT
LOWER CASE
FOOT UNIT A
FOOT UNIT B
FOOT RUBBER UNIT
PUSH NUT
AIR FILTER
SHADE SHEET LOWER CASE A
SHADE SHEET LOWER CASE B
SHADE SHEET LOWER CASE C
INSULATION PLATE PS
POWER SUPPLY UNIT
SHADE SHEET PS
BALLAST UNIT
SCI CABLE, 5P
WASHER POLISLIDER
P.C.B. ASS'Y
IF HOLD PLATE
IF SHADE SHEET A
IF SHADE SHEET B
INTAKE DUCT UNIT
INTAKE FAN
MA FIXING PLATE R
LAMP COVER DETECTION SWITCH
MA-R SHADE SHEET
MA HOLD PLATE LF
P.C.B. ASS'Y
RC RECEPTOR CABLE
THERMISTOR LAMP
EXHAUST FAN UNIT
COATING CLIP
FERRITE CORE
SHIELD PLATE UP
IF PANEL UNIT
UPPER CASE UNIT
LA LOCK LEVER
LA LEVER COIL SPRING
RC RECEPTOR FILTER F
RC RECEPTOR FILTER R
OPERATION PANEL
LAMP COVER
LENS CAP UNIT
EMBLEM
BIND HEAD P-TITE SCREW
BIND HEAD SCREW
CUP HEAD P-TITE SCREW
CUP HEAD SCREW
SEMS PAN HEAD SCREW
SEMS PAN HEAD SCREW
PAN HEAD B-TITE SCREW
PAN HEAD B-TITE SCREW
HEXAGON SCREW
Remarks
1213486
1104738
1104741
1104743
1154770
1104745
1094388
1114079
1114080
1114081
1102534
2077020
1114098
1104766
2069542
1212613
2073222
1104747
1114077
1114078
1094038
1102607
1109692
1094345
1114087
1104748
2069547
2069543
2068735
1104750
1039679
2069550
1114086
1104753
1104756
1094048
1094108
1104762
1104763
2069545
1104764
1114094
5P
IF
RC
3x8
3x6
3x20
3x6
2.3x10
3x35
4x10
3x8
HSH 4-40
Markets
F/ZN
F/NI
F/ZN
F/ZN
F/ZN
F/ZN
F/ZN
F/Ni
1021824
1071078
1103661
1021826
1104111
1103666
1024188
1008316
1101676
* New Parts
75
LPX-500
LPX-500
Ref.
No.
* 200
200-1
Z * 201
Z * 201
Z * 201
Z * 201
Z * 201
PART NO.
V8971400
AAX25060
AAX35540
AAX35560
AAX35550
AAX35570
AAX35670
* New Parts
76
Description
ACCESSORIES
REMOTE CONTROL
BATTERY COVER
POWER CABLE
POWER CABLE
POWER CABLE
POWER CABLE
POWER CABLE
RRC9000-5102L
103RRC-173-08L
2.9m
2.9m
2.9m
2.9m
2.9m
Remarks
Markets
RRC9000-5102L
103RRC-173-08L
2017328
2068583
2068582
2068585
2068584
UCR
GR
B
A
T
LPX-500
LPX-500
Chapter 6 Other
6.1. REMOTE CONTROL TRANSMITTER
JP2
JP1
R18
0Ω
100Ω
1
2
T1
3
4
X1
3.64MHz
5
R7
270Ω
D4
AA1111R
6
VSS
CARR
E1
D0
X IN
X OUT
E0
7
8
G1
9
10
VDD
E2
G0
Q4
2SC3265
D10
AA1111R
R2
C2
0.1µF
IC1 : M34280M1-917GP
C1
100µF
R14
82Ω
1Ω
D1
SLR-932AV-7
R3
3V
R8
82Ω
R1
Q2
2SC3265
D1
D2
D3
20
19
D2
SLR-932AV-7
Q1
R4 2SC3265
1Ω
1
100Ω
K1
K2
K3
K5
K6
K7
32
18
17
K9
16
K10
K11
10
5
22
18
12
7
15
19
20
21
9
23
24
25
26
27
28
29
30
T2
15
K14
K15
K18
K19
K20
12
K21
K22
K23
K24
11
K25
K26
K27
K28
K29
K30
13
D7
14
K12
D5
G3
6
11
D4
D6
4
K4
14
G2
2
3
K32
T3
Key
No.
1
2
3
4
5
6
7
9
10
11
12
14
15
18
FUNCTION
CUSTOM
DATA
AUTO
ON/STANDBY
PATTERN
ESCAPE
MENU
(H) UP
STILL
VIDEO
( ) SELECT
ASPECT
PICTURE
(–) LEFT
HIDE
(+) RIGHT
D1
D1
D1
D1
D1
D1
D1
D1
D1
D1
D1
D1
D1
D1
C3
C2
C9
D5
D3
CC
DF
D9
D0
EA
D7
CE
C6
CF
Key
No.
19
20
21
22
23
24
25
26
27
28
29
30
32
FUNCTION
S VIDEO
INPUT A
DVI
(G) UP
INPUT B
D4
1
2
3
4
5
6
LIGHT
CUSTOM
DATA
D1
D1
D1
D1
D1
D1
D1
D1
D1
D1
D1
D1
D8
DA
DC
CD
DB
DD
E1
E2
E3
E4
E5
E6
77
LPX-500
LPX-500
Chapter 6 Other
6.2. OPTICAL ENGINE UNIT PACKAGE DIAGRAM
Polyvinyl bag
MA board
105
103
Optical engine
104
103
101
6.2.1. Optical engine packing material
*
*
*
*
*
Ref.
No.
PART NO.
101
102
103
104
105
AAX35500
AAX35490
AAX35510
AAX35520
AAX35020
* New Parts
78
Description
CARTON BOX
LOWER PAD
UPPER PAD
POLYVINYL BAG
BOX FOR MAIN BOARD ASS'Y
Remarks
for
for
for
for
OPTICAL
OPTICAL
OPTICAL
OPTICAL
ENGINE
ENGINE
ENGINE
ENGINE
1094892
1094893
1094894
5021163
1094896
Markets
LPX-500
LPX-500
Chapter 6 Other
6.3. PACKING THE OPTICAL ENGINE UNIT
6.3.1. Preparation before packing
1) Put the MA board in the polyvinyl bag provided as packing material.
2) Put the optical engine in the polyvinyl bag provided as packing material.
6.3.2. Packing procedure
1) Set up the carton box for the optical engine unit.
2) Put the lower pad for the optical engine in the package box set up in the above step 1).
3) Put the bagged optical engine in the carton box.
4) Put the upper pad for the optical engine.
5) Put the box for the MA board in the carton box.
6) Put the bagged MA board in its box set in the above step 5).
7) Close and seal the carton box securely.
79
LPX-500
LPX-500

YAMAHA - LPX 500- Service Manual

Transcription

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