STR-K740P/K840P

STR-K740P/K840P
SERVICE MANUAL
US Model
Canadian Model
AEP Model
UK Model
E Model
Ver 1.0 2002. 02
• STR-K740P/K840P are the tuner and the
amplifier section in HT-DDW740/DDW840.
Photo : STR-K840P (SILVER model)
Dolby Laboratories Licensing Corporation.
“DOLBY” the double-D symbol ; “AC-3” and “PRO LOGIC”
are trademarks of Dolby Laboratories Licensing Corporation.
SPECIFICATIONS
POWER OUTPUT AND TOTAL
HARMONIC DISTORTION:
With 8 ohm loads, both channels driven, from
40 – 20,000 Hz; rated 100 watts (STR-K840P
only)/80 watts (STR-K740P only) per channel
minimum RMS power, with no more than
0.09 % total harmonic distortion from 250
milliwatts to rated output (Models of area code
U only).
Amplifier section
POWER OUTPUT
Models of area code U, CA
Rated Power Output at Stereo Mode
(8 ohms 40 Hz – 20 kHz, THD 0.09 %)
STR-K840P:
100 W + 100 W
STR-K740P:
80 W + 80 W
Reference Power Output
(8 ohms 1 kHz, THD 0.7 %)
STR-K840P:
FRONT1):100 W/ch
CENTER1): 100 W
SURR1): 100 W/ch
STR-K740P:
FRONT1): 80 W/ch
CENTER1): 80 W
SURR1): 80 W/ch
Models of area code CEL,CEK
Rated Power Output at Stereo Mode
(8 ohms 1 kHz, THD 0.7 %)
STR-K840P:
100 W + 100 W2)
STR-K740P:
80 W + 80 W2)
Reference Power Output2)
(8 ohms 1 kHz, THD 0.7 %)
STR-K840P:
FRONT1): 100 W/ch
CENTER1): 100 W
SURR1): 100 W/ch
STR-K740P:
FRONT1): 80 W/ch
CENTER1): 80 W
SURR1): 80 W/ch
9-873-544-01
Sony Corporation
2002B1600-1
© 2002.02
Home Audio Company
Published by Sony Engineering Corporation
Models of area code AR, SP
Rated Power Output at Stereo Mode
(8 ohms 1 kHz, THD 0.7 %)
STR-K840P:
90 W + 90 W
Reference Power Output2)
(8 ohms 1 kHz, THD 10 %)
STR-K840P:
FRONT1): 120 W/ch
CENTER1): 120 W
SURR1): 120 W/ch
Models of other area code
Rated Power Output at Stereo Mode
(8 ohms 1 kHz, THD 0.7 %)
STR-K840P:
100 W + 100 W2)
STR-K740P:
80 W + 80 W2)
Reference Power Output2)
(8 ohms 1 kHz, THD 10 %)
STR-K840P:
FRONT1): 120 W/ch
CENTER1): 120 W
SURR1): 120 W/ch
STR-K740P:
FRONT1): 100 W/ch
CENTER1): 100 W
SURR1): 100 W/ch
1) Depending on the sound field settings and the
source, there may be no sound output.
2) Measured under the following conditions:
Area code
Power requirements
E
240 V AC, 50 Hz
SP, CEL, CEK, AR
230 V AC, 50 Hz
MX
120 VAC, 60 Hz
— Continued on next page —
FM STEREO FM-AM RECEIVER
STR-K740P/K840P
Frequency response
MULTI CH IN3), CD,
MD/TAPE, DVD/LD,
VIDEO 1, 2
Inputs (Analog)
MULTI CH IN3), CD,
MD/TAPE, DVD/LD,
VIDEO 1, 2
AM tuner section
10 Hz – 50 kHz
+0.5/–2 dB (with sound
field, and tone bypassed)
Sensitivity: 250 mV
Impedance: 50 kilohms
S/N4): 96 dB
(A, 250 mV5))
Tuning range
Models of area code U, CA
With 10-kHz tuning scale: 530 – 1710 kHz6)
With 9-kHz tuning scale: 531 – 1710 kHz6)
Models of area code E, AR, MX
With 10-kHz tuning scale: 530 – 1610 kHz6)
With 9-kHz tuning scale: 531 – 1602 kHz6)
Models of area code MY, SP, CEL, CEK
With 9-kHz tuning scale: 531 – 1602 kHz
Antenna
Loop antenna
3) HT-DDW840 only
4) INPUT SHORT (with sound field and tone
bypassed).
5) Weighted network, input level.
Intermediate Frequency
450 kHz
Usable sensitivity
50 dB/m (at 1,000 kHz or
999 kHz)
Inputs (Digital)
DVD/LD (Coaxial)
S/N
54 dB (at 50 mV/m)
Harmonic distortion
0.5 % (50 mV/m, 400 Hz)
Selectivity
At 9 kHz:
At 10 kHz:
35 dB
40 dB
VIDEO 2 (Optical)
Outputs
MD/TAPE (OUT),
VIDEO 1
(AUDIO OUT)
SUB WOOFER
Tone
Gain levels:
Sensitivity: –
Impedance: 75 ohms
S/N: 100 dB
(A, 20 kHz LPF)
Sensitivity: –
Impedance: –
S/N: 100 dB
(A, 20 kHz LPF)
Voltage: 250 mV
Impedance: 10 kilohms
Voltage: 2 V
Impedance: 1 kilohms
±6 dB, 1 dB step
FM tuner section
6) You can change the AM tuning scale to 9 kHz or
10 kHz. After tuning in any AM station, turn off
the receiver. Hold down PRESET TUNING + and
press
. All preset stations will be erased when
you change the tuning scale. To reset the scale to
10 kHz (or 9 kHz), repeat the procedure.
Video section
Inputs
Video:
1 Vp-p, 75 ohms
Outputs
Video:
1 Vp-p, 75 ohms
General
Power requirements
Tuning range
87.5 - 108.0 MHz
Area code
Power requirements
Antenna terminals
75 ohms, unbalanced
U, CA, MX
120 V AC, 60 Hz
Intermediate Frequency
10.7 MHz
Sensitivity
Mono:
Stereo:
Usable sensitivity
S/N
Mono:
Stereo:
18.3 dBf, 2.2 µV/75 ohms
38.3 dBf, 22.5 µV/75 ohms
11.2 dBf, 1 µV/75 ohms
76 dB
70 dB
Harmonic distortion at 1 kHz
Mono:
0.3%
Stereo:
0.5%
Separation
45 dB at 1 kHz
Frequency response
30 Hz – 15 kHz,
+0.5/–2 dB
Selectivity
60 dB at 400 kHz
CEL, CEK
230 V AC, 50/60 Hz
MY, SP, AR
220 – 230 V AC, 50/60 Hz
E
120/220/240 V AC, 50/60 Hz
Power consumption
Area code
Power consumption
U, MX
STR-K840P: 210 W
STR-K740P: 180 W
CA
STR-K840P: 300 VA
STR-K740P: 260 VA
CEL, CEK, MY, SP,
E, AR
STR-K840P: 180 W
STR-K740P: 155 W
Power consumption (during standby mode)
0.5 W
Dimensions
430 145 298 mm
(16 7/8 5 6/8 11 6/8
inches) including
projecting parts and
controls
Mass (Approx.)
7.0 kg (15 lb 7 oz)
Design and specifications are subject to change
without notice.
•
2
Abbreviation
U
: US model.
CA
: Canadian model.
CEL : AEP model.
CEK : UK model.
SP
: Singapore model. (Malaysia model included.)
MX : Mexican model.
MY : Malaysia model.
AR
: Argentine model.
STR-K740P/K840P
SAFETY CHECK-OUT
After correcting the original service problem, perform the
following safety checks before releasing the set to the customer:
Check the antenna terminals, metal trim, “metallized” knobs, screws,
and all other exposed metal parts for AC leakage. Check leakage as
described below.
LEAKAGE
The AC leakage from any exposed metal part to earth ground
and from all exposed metal parts to any exposed metal part having
a return to chassis, must not exceed 0.5 mA (500 microamperes).
Leakage current can be measured by any one of three methods.
1.
A commercial leakage tester, such as the Simpson 229 or RCA
WT-540A. Follow the manufacturers’ instructions to use these
instruments.
2.
A battery-operated AC milliammeter. The Data Precision 245
digital multimeter is suitable for this job.
3.
Measuring the voltage drop across a resistor by means of a
VOM or battery-operated AC voltmeter. The “limit” indication
is 0.75 V, so analog meters must have an accurate low-voltage
scale. The Simpson 250 and Sanwa SH-63Trd are examples of
a passive VOM that is suitable. Nearly all battery operated
digital multimeters that have a 2V AC range are suitable. (See
Fig. A)
Notes on chip component replacement
• Never reuse a disconnected chip component.
• Notice that the minus side of a tantalum capacitor may be
damaged by heat.
Unleaded solder
Boards requiring use of unleaded solder are printed with the leadfree mark (LF) indicating the solder contains no lead.
(Caution: Some printed circuit boards may not come printed with
the lead free mark due to their particular size.)
: LEAD FREE MARK
Unleaded solder has the following characteristics.
• Unleaded solder melts at a temperature about 40°C higher than
ordinary solder.
Ordinary soldering irons can be used but the iron tip has to be
applied to the solder joint for a slightly longer time.
Soldering irons using a temperature regulator should be set to
about 350°C.
Caution: The printed pattern (copper foil) may peel away if the
heated tip is applied for too long, so be careful!
• Strong viscosity
Unleaded solder is more viscous (sticky, less prone to flow) than
ordinary solder so use caution not to let solder bridges occur such
as on IC pins, etc.
• Usable with ordinary solder
It is best to use only unleaded solder but unleaded solder may
also be added to ordinary solder.
To Exposed Metal
Parts on Set
0.15 µF
1.5 kΩ
AC
Voltmeter
(0.75 V)
Earth Ground
Fig. A. Using an AC voltmeter to check AC leakage.
SAFETY-RELATED COMPONENT WARNING!!
COMPONENTS IDENTIFIED BY MARK 0 OR DOTTED LINE WITH
MARK 0 ON THE SCHEMATIC DIAGRAMS AND IN THE PARTS
LIST ARE CRITICAL TO SAFE OPERATION. REPLACE THESE
COMPONENTS WITH SONY PARTS WHOSE PART NUMBERS
APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS
PUBLISHED BY SONY.
ATTENTION AU COMPOSANT AYANT RAPPORT
À LA SÉCURITÉ!
LES COMPOSANTS IDENTIFÉS PAR UNE MARQUE 0 SUR LES
DIAGRAMMES SCHÉMATIQUES ET LA LISTE DES PIÈCES SONT
CRITIQUES POUR LA SÉCURITÉ DE FONCTIONNEMENT. NE
REMPLACER CES COMPOSANTS QUE PAR DES PIÈSES SONY
DONT LES NUMÉROS SONT DONNÉS DANS CE MANUEL OU
DANS LES SUPPÉMENTS PUBLIÉS PAR SONY.
3
STR-K740P/K840P
MODEL IDENTIFICATION
TABLE OF CONTENTS
— BACK PANEL —
1. GENERAL ·········································································· 5
2. TEST MODE ······································································ 6
3. DIAGRAMS ········································································ 8
Parts No.
MODEL
K740P : US
PARTS No.
4-238-189-2s
K740P : Canadian
K740P : Malaysia,Singapore
4-238-189-3s
4-238-189-4s
K740P : E
K740P : AEP
4-238-189-5s
4-238-189-6s
K740P : UK
K840P : US
4-238-189-7s
4-238-193-0s
K840P : Canadian
K840P : Malaysia, Singapore
4-238-193-1s
4-238-193-2s
K840P : E
K840P : AEP
4-238-193-3s
4-238-193-4s
K840P : UK
K840P : Argentine
4-238-193-5s
4-238-193-8s
K840P : Mexican
4-238-193-9s
3-1. Circuit Board Location ·················································· 8
3-2. Block Diagrams – MAIN Section – ···························· 10
– DISPLAY/POWER Section – ··································· 11
3-3. Printed Wiring Board – DIGITAL Section – ··············· 12
3-4. Schematic Diagram – DIGITAL Section (1/2) – ········· 13
3-5. Schematic Diagram – DIGITAL Section (2/2) – ········· 14
3-6. Printed Wiring Board – MAIN Section – ···················· 15
3-7. Schematic Diagram – MAIN Section (1/2) – ·············· 16
3-8. Schematic Diagram – MAIN Section (2/2) – ·············· 17
3-9. Printed Wiring Board – DISPLAY Section – ·············· 18
3-10. Schematic Diagram – DISPLAY Section – ················· 19
3-11. Printed Wiring Board – VIDEO Section – ·················· 20
3-12. Schematic Diagram – VIDEO Section – ····················· 20
3-13. Printed Wiring Board – POWER Section – ················· 21
3-14. Schematic Diagram – POWER Section – ··················· 22
3-15. IC Block Diagrams ······················································ 23
3-16. IC PIN FUNCTION DESCRIPTIONS ······················· 25
4. EXPLODED VIEWS ······················································ 27
4-1. Front Panel Section ····················································· 27
4-2. Chassis Section-1 ························································ 28
4-3. Chassis Section-2 ························································ 29
5. ELECTRICAL PARTS LIST ······································· 30
4
STR-K740P/K840P
SECTION 1
GENERAL
ALPHABETICAL ORDER
0–9
2 CH wh (26)
A–D
A.DEC wk (24, 26)
AM (Except for models of area
code CEL, CEK) es (31, 32)
BASS +/– wg (19, 30, 57)
CD ql (22)
CINEMA STUDIO EX A, B, C
9 (25)
Digital Cinema Sound (indicator)
qs (24)
DIMMER ej (23)
DISPLAY 2 (23, 34, 52)
Display qa (23)
DVD/LD wa (22)
FM MODE (Models of area code
CEL, CEK only) ed, (Except for
models of area code CEL, CEK)
ef (32)
INPUT MODE qg (22)
IR (receptor) 4 (39, 46, 52)
LEVEL 0 (16, 20, 28, 57)
M
MASTER VOLUME wd (20, 50)
MD/TAPE qj (22)
MEMORY eh (31, 33)
MENU +/– e; (16, 28, 36, 37, 57)
MENU </> ea (16, 28, 36, 37, 57)
MODE wj (25, 30, 51)
MULTI CHANNEL DECODING
(indicator) (HT-DDW840 only)
7 (22)
MULTI CH IN (HT-DDW840
only) qf (22)
MUTING wf (22, 50)
E–L
ENTER wl (36)
FM (Except for models of area
code CEL, CEK) ed (31, 32)
FM/AM (Models of area code
CEL, CEK only) es (31, 32)
1
23
4
This section is extracted
from instruction manual.
PRESET TUNING +/– (Except
for models of area code CEL,
CEK) 3 (33, 54)
PTY (models of area code CEL,
CEK only) ef (34)
SET UP 6 (4, 16, 37, 57)
SHIFT eg (33)
SLEEP (HT-DDW740 only) qf
(37)
SURR qd (28, 57)
T–Z
TREBLE +/– qh (30, 57)
TUNER ws (22, 32, 33, 36)
TUNING +/– 5 (32)
VIDEO 1 qk (22)
VIDEO 2 w; (22)
BUTTON DESCRIPTIONS
?/1 (power) 1 (4, 15, 20, 21,
30, 31, 54)
N–S
NAME 8 (36)
PHONES (jack) ek (22, 51)
PRESET/PTY SELECT +/–
(Models of area code CEL, CEK
only) 3 (33, 34)
5
•
Abbreviation
CEK : UK model.
CEL : AEP model.
6 7 8 90 qaqsqdqf qg qhqjqkqlw; waws
g
+
–
ek
ej
eh eg ef ed es ea e; wl wk wj wh
wg
wf
wd
5
STR-K740P/K840P
SECTION 2
TEST MODE
FACTORY PRESET MODE
3. Press the VIDEO button, confirm display
* All preset contents are reset to the default setting.
* Procedure:
While depressing the VIDEO 1 and the 2CH buttons simultaneously, press the power ?/1 button to turn on the main power.
The message “FACTORY” appears and switch off the set.
While depressing the VIDEO 1 and the 2CH buttons simultaneously, press the power ?/1 button again. The message
“FACTORY” appears and the present contents are reset to the
default values.
* Either the 9 kHz step or 10 kHz step can be selected for the AM
channel step.
* Procedure:
Set the FUNCTION to AM. Turn off the main power.
While depressing the TUNING+ button or the
PRESET+ button, press the power ?/1 button to turn on the
main power. Either the message “9 k STEP” or “10 k STEP”
appears. Select the desired step.
* For US/Canadian/E model only
SPEAKER SIZE SELECTION MODE
*Either Normal Speaker or Micro Satellite Speaker can be selected.
*Procedure:
While depressing the LEVEL button, press the power ?/1 button
to turn the main power.
Either the message “NORM. SP.” or “MICRO SP.” is displayed.
Select the desired speaker size.
FLUORESCENT INDICATOR TUBE TEST MODE
* All fluorescent segments are tested. When this test is activated,
all segments turn on at the same time, then each segment turns on
one after another.
* Procedure:
While depressing the MD/TAPE and the SHIFT buttons simultaneously, press the power ?/1 button to turn on the main power.
1. All segments turn on.
L
SLEEP
SP.OFF
C
R
DDDIGITALPRO LOGIC DTS MPEGSTEREO MONO RDS
OPT COAX MULTI CH IN D.RANGE EQ TA NEWS INFO
SL
S
MEMORY
MUTING
dB
kHz
mft.
MHz
(((LFE)))
SR
SLEEP
PRO LOGIC
DD
COAX
L
MPEGSTEREO
D.RANGE
TA
RDS
INFO
MUTING
R
LFE
S
k
m
MHz
A.F.D. , MODE , LEVEL , SET UP , and Digital Cinema Sound
LED turn on.
6
SL
EQ
MONO
NEWS
)))
SR
MEMORY
dB
Hz
ft.
MULTI CHANNEL DECODING , 2CH , SURR and NAME
LED turn on.
5. Every pressing of the VIDEO button turns on each
segment and LED one after another in the same order.
(Not only the VIDEO button, but also the other buttons such as
DVD/LD , TV/SAT , MD/TAPE , CD , TUNER and AUX can
be used.)
SOUND FIELD CLEAR MODE
* The preset sound field is cleared when this mode is activated.
Use this mode before returning the product to clients upon
completion of repair.
* Procedure:
While depressing the MODE button, press the power ?/1 button
to turn on the main power.
The message “SURR. CLR.” appears and initialization is
performed.
DEMONSTRATION MODE
* Demonstration is performed.
* Procedure :
While depressing the SET UP button, press the power ?/1
button. The message appears and demonstration is performed.
* To finish DEMONSTRATION MODE, press the power ?/1
button while the introduction message appears in the display.
SOFTWARE VERSION DISPLAY MODE
* The software version is displayed.
* Procedure:
While depressing the ENTER and the A.F.D buttons
simultaneously, press the power ?/1 button to turn on the main
power. The model name, destination and the software version are
displayed.
KEY CHECK MODE
MULTI CHANNEL DECODING , Digital Cinema Sound ,
A.F.D. , MODE , 2CH and SET UP LED turn on.
2. Press the VIDEO button, confirm display.
SW
(((
DIGITAL
DTS
OPT
MULTI CH IN
4. Press the VIDEO button, All segments turn off.
AM CHANNEL STEP 9 KHZ/10 KHZ
SELECTION MODE
SW
SP.OFF
C
* Button check
* Procedure:
While depressing the VIDEO 1 and the SHIFT buttons
simultaneously, press the power ?/1 button to turn on the main
power.
“REST 39” appears. (AEP, UK, model: “RESET 38”)
Every pressing of any button other than ?/1 and SPEAKERS
counts down the buttons. The buttons which are already counted
once are not counted again. When all buttons are pressed “REST
00” appears.
When MASTER VOLUME is rotated in clockwise direction,
“VOL MIN”, “VOL 1” to “VOL 48”, “VOL MAX” appear.
STR-K740P/K840P
AUTO BETICAL MODE
* This mode is installed in the Europe models only. When this mode
is used, the receiver scans the broadcasts that can be received by
the tuner, and sets up the broadcasts. Be sure to start scanning
after connecting the antenna.
* Procedure:
1. Check that the antenna is connected.
2. Press the ?/1 button to turn on the power while pressing the
MEMORY button.
3. The message “AUTO-BETICAL SELECT” appears and the
receiver starts scanning.
7
STR-K740P/K840P
SECTION 3
DIAGRAMS
3-1. Circuit Board Location
STANDBY board
AC SELCT board (E model only)
VIDEO board
POWER SW board
MAIN board
DIGITAL board
HEADPHONE board
DISPLAY board
8
STR-K740P/K840P
THIS NOTE IS COMMON FOR PRINTED WIRING
BOARDS AND SCHEMATIC DIAGRAMS.
(In addition to this necessary note is printed in each
block.)
For schematic diagrams.
Note:
• All capacitors are in µF unless otherwise noted. p : pF. 50
WV or less are not indicated except for electrolytics and
tantalums.
• All resistors are in Ω and 1/4 W or less unless otherwise
specified.
•
%
: indicates tolerance.
f
•
: internal component.
• 2 : nonflammable resistor.
• 5 : fusible resistor.
• C : panel designation.
Note:
The components identified by
mark 0 or dotted line with mark
0 are critical for safety.
Replace only with part number
specified.
Note:
Les composants identifiés par
une marque 0 sont critiques
pour la sécurité.
Ne les remplacer que par une
pièce portant le numéro spécifié.
• A : B+ Line.
• B : B– Line.
• Voltages and waveforms are dc with respect to ground
under no-signal (detuned) conditions.
No mark : FM
• Voltages are taken with a VOM (Input impedance 10 MΩ).
Voltage variations may be noted due to normal production tolerances.
• Waveforms are taken with a oscilloscope.
• Circled numbers refer to waveforms.
• Signal path.
F : FM
J : CD (ANALOG)
c : DVD (DIGITAL)
• Abbreviation
CND : Canadian model
MY
: Malaysia model
SP
: Singapore model
AR
: Argentine model
MX
: Mexican model
For printed wiring boards.
Note:
• Waveform
• X : parts extracted from the component side.
a
: Through hole.
•
f
•
: internal component.
: Pattern from the side which enables seeing.
•
DIGITAL Board
1 IC1101 wa (XOUT)
C
4.4Vp-p
These are omitted.
Q
B E
81ns
(12.288MHz)
B C E
These are omitted.
2 IC1201 9 (MCLK1)
Caution:
Pattern face side:
(Side A)
Parts face side:
(Side B)
3.3Vp-p
Parts on the pattern face side seen from
the pattern face are indicated.
Parts on the parts face side seen from
the parts face are indicated.
73ns (13.59MHz)
3 IC1601 id (XI)
2.8Vp-p
5ns (20MHz)
9
9
STR-K740P/K840P
3-2. Block Diagrams – MAIN Section –
IC201
ANALOG SOUND
PROC.
TUNER PACK
FM
75 Ω
COAXIAL
FM
AM
AM
L CH
ANTENNA
R CH
1 L IN8
IC1601(1/3)
SYSTEM CONTROL.
R-CH
ST-DO
76 DO
J402
ST-DI
CLK
CD
CE
78 SLATCH
STEREO
74 STEREO
TUNED
73 TUNED
MUTING
75 MUTING
AEP, UK
RDS-DATA
2 L IN9
OUT
67 L REC3
MD/TAPE
L
L OUT 51
IN
Q361
MUTING
J403
IN
71 L IN7
DVD/LD
AUDIO IN
69 L IN5
VIDEO 2
AUDIO IN
53 RDS DATA
RDS-INT
FM SIG OUT
52 RDS CLOCK
43 RDS SIGNAL
J404
SL
SL OUT 47
63 L IN2
AUDIO OUT
Q365
MUTING
61 L REC1
VIDEO 1
AUDIO IN
VIDEO OUT
1 M.OUT
J401
13 V1
VIDEO IN
VIDEO 1
SW2 10
89 SW2
SW3 4
88 SW3
J200
VIDEO OUT
A
90 SW1
SW1 14
15 V1 OUT
VIDEO 2
VIDEO IN
5 V2
DVD/LD
VIDEO IN
3 DVD
MULTI
CH IN
FRONT
11 AL IN
SURROUND
13 ASL IN
SUB WOOFER
16 ASW IN
CENTER
IC1101
DIGITAL AUDIO
I/F RECEIVER
D204
SW5 2
J1101
D203
COAXIAL
DVD/LD
IN
IC1102
3
5
IC1102
6
2
10 AL OUT
29 LINIC1502
2
1
-
IC1201
AUDIO DSP
DIGITAL
IC1105
VIDEO 2
IN
Q363
MUTING
IC1501
AUDIO CODEC
5 DIN2
IC1502
6
7
-
OPTICAL
C
C OUT 39
15 AC IN
87 SW4
SW4 6
OPTICAL
IN
4 DIN1
30 LIN+
CK OUT 13
22 KFSI0
BCK 14
29 BCKI2
BCKO1 20
4 BCK
LRCK 15
28 LRCKI2
LRCKO 19
5 LRCK
30 SDI2
DATAO 16
D1101
L OUT1 27
27 DL IN
L OUT2 25
29 DSL IN
L OUT3 23
31 DC IN
R OUT3 24
SDI1 18
9 SDTO
32 DSW IN
SDO1 23
6 SDTI1
SDO2 24
7 SDTI2
SDO3 25
8 SDTI3
SW
SW OUT 35
Q364
MUTING
39 MCLKI
SCK OUT 14
20 DATA
35 DO
21 CLK
36 DI
43 CDT1
69 GP8
AUDIO 24
38 CLK
IC1202
SRAM
33 HD IN
17 XSTATE
17 PD
3 S.MUTE
34 HCLK
48 XMODE
36 HCS
47 CKSEL1
XIN
22
41 CS
35 HD OUT
34 ERROR
22 LATCH
42 CCLK
68 GP9
37 CE
32 HACN
Q1601,1602
Q379
MUTING
CONT
MUTING
SWITCH
113 PM
XOUT
21
56 BST
MCLK1 9
2 XRST
X1101
12.288MHz
59 EXLOCK
X1201
13.5MHz
MCLK2 12
IC1604
EEPROM
14 15 16
24
21
34
33
ANA/DIG
F.MUTING
SDA
SCL
CLK
CDT1
6
DATA
XRST
SCL
5
9
LATCH
PM
CS
10 12 13 8
PD
6
SDA
SMUTE
3
SCL
7
BST
HCS
HCLK
GP9
5
HACN
2 18 19 20 4
HD IN
1
HD OUT
CKSEL1
ERROR
XMODE
XSTATE
DI
: FM
CE
98 97 95 96 99 100 93 94
DO
• R-CH is omitted due to same as L-CH.
• Signal Path
DATA0
D1601
CLK
MONITOR
62 L IN1
IC103
VIDEO SELECT
J201
+3.3V
CNS3
MD0
MD0 49
VDD
MD2
MD2 51
: CD(ANALOG)
IC1601(2/3)
SYSTEM CONTROL
: DVD (DIGITAL)
SP SWITCH/FLASH 1 28
FLASH 2 27
FLASH 1
FLASH 2
RESET
B
10
10
FOR
FLASH
PROGRAMMING
STR-K740P/K840P
– DISPLAY/POWER Section –
R-CH
J791
PHONES
IC701
POWER AMP
RY791
Q790
RELAY
DRIVE
Q703
BOOSTER
+V OUT2 12
Q701,702
LIMITER
L
8 IN2
TM602
L
NF2 9
RY701
• R-CH is omitted due to same as L-CH
• Signal Path
1 MUTING
: FM
D731
Q740
AF POWER
PROTECT
R-CH
R
Q705,706
CURRENT
DETECT
Q704
BOOSTER
-V OUT2 11
FRONT
Q710
RELAY
DRIVE
IC702
POWER AMP
SPEAKERS
Q653
BOOSTER
+V OUT2 12
TM601
Q651,652
LIMITER
R-CH
SR
SURROUND
SL
8 IN2
SL
NF2 9
RY601
1 MUTING
D733
Q540
AF POWER
PROTECT
D734
Q610
RELAY
DRIVE
C
CENTER
Q655,656
CURRENT
DETECT
Q654
BOOSTER
-V OUT2 11
A
Q640
AF POWER
PROTECT
POWER AMP
IC501
Q503
BOOSTER
+V OUT 6
Q501,502
LIMITER
C
1 IN+
IN- 2
RY501
IC1901
Q505,506
CURRENT
DETECT
Q504
BOOSTER
-V OUT 5
Q550
RELAY
DRIVE
+3.3V
2
+3.3V
REG
+2.5V
5
+2.5V
REG
4
D721
Q722,723,725
PROTECT
SWITCH
FL101
FLUORESCENT
INDICATOR TUBE
5
SW
IC401
7
AUDIO
OUT
RY560
F1
F2
14 29
42 31
SEG1-16 GRID1-12
DIN
CLK
STB
7
8
9
Q107-111
LED
DRIVE
D802
SW4 4
+B
-B
POWER AMP
-B
D100-104
2
IC601
1
5
IC601
FL101
-30V
RELAY
+B
69
IC801
1
AUDIO
-7V
3
AUDIO
+5V
IC102
REMOTE
1 CONTROL
RECEIVER
SIRCS 54
SYSTEM CONTROL
IC1601(3/3)
3
+5V
REG
1
VIDEO
+5V
3
g
K740P:AEP,UK
K840P:AEP,UK
TUNER
+3.3V
AVCC 35
VIDEO
-5V
3
3
+3.3V
1
REG
TUNER
+10V
3
+3.3V(STBY)
X0
X1
A/D0
A/D1
A/D2
A/D3
VOL(B)
VOL(A)
POWER KEY
POWER RELAY
38
39
40
41
59 60
56
66
D898
2
+5V
REG
K740P:E/K840P:E MODEL ONLY
1
-5V
REG
S901
VOLTAGE
SELECTOR
F1
2
+10V
REG
F2
IC1602
1 RESET 2
+3.3V
1
REG
D910-913
3
1
STOP 48
FUNCTION
KEY
FUNCTION
KEY
FUNCTION
KEY
FUNCTION
KEY
ENCODER
S100-109
S110-119
S120-128
S130-137,
S143,144
RV102
S145
B
AC
IN
D915
RESET
RY901
Q901
RELAY
DRIVE
?/1
MASTER
VOLUME
11
T902
Q921
AC DET
D914
X1601
20.0MHz
F901
1
IC1904
3
VCC5 23
83
D899
IC1902
VCC3 84
82
-7V
REG
IC804
IC1905
RSTX 77
3
IC807
IC1503
FUSE DETECT 55
+7V
REG
IC802
25
HP DETECT
REAR RELAY
71
WOOFER RELAY
70
CENTER RELAY
72
PREOUT/FRONT RELAY
PROTECTOR
68
HEADPHONE RELAY
67
AC MUTING
AFD LED
2CH LED
22
DCS LED
BLUE LED
MODE LED
FL_STB
29 30 31 32 26
AUDIO
+7V
Q471
+3.3V REG
+3.3V
61 62 63
Q801
-30V REG
D820-823
Q100-104
LED DRIVE
DIN
Q691,692
-B SW
7
IC101
BUFFER
CLK
1
Q747,748
POWER
MUTING
D111-114
SW1 1
SW3 3
+5V
SUB
WOOFER
Q560
RELAY
DRIVE
IC100
FL DRIVE
SW2 2
+5V
3
REG
T901
D902-905
IC1903
J405
11
STR-K740P/K840P
3-4. Schematic Diagram – DIGITAL Section (1/2) –
• See page 9 for Waveform. • See page 23 for IC Block Diagrams.
IC B/D
13
13
STR-K740P/K840P
3-5. Schematic Diagram – DIGITAL Section (2/2) –
• See page 9 for Waveform. • See page 25 for IC Pin Function Description.
14
14
STR-K740P/K840P
3-7. Schematic Diagram – MAIN Section (1/2) –
• See page 23 for IC Block Diagrams.
13
16
16
STR-K740P/K840P
3-8. Schematic Diagram – MAIN Section (2/2) –
• See page 23 for IC Block Diagrams.
IC B/D
IC B/D
IC B/D
17
17
STR-K740P/K840P
3-10. Schematic Diagram – DISPLAY Section –
• See page 24 for IC Block Diagrams.
IC B/D
19
19
STR-K740P/K840P
3-11. Printed Wiring Board – VIDEO Section –
•
3-12. Schematic Diagram – VIDEO Section –
: Uses unleaded solder.
• See page 24 for IC Block Diagrams.
• See page 8 for Circuit Boards Location.
IC807
IC B/D
IC804
IC103
20
20
STR-K740P/K840P
3-13. Printed Wiring Board – POWER Section –
•
: Uses unleaded solder.
• See page 8 for Circuit Boards Location.
K740P:US, CND/K840P:US, CND
(CHASSIS)
EXCEPT K740P:E/K840P:E
K740P:E/K840P:E
3
5
4
J
3
H
2
CNP801
(Page 15)
1
2
CNP802
(Page 15)
1
3
2
1
21
21
STR-K740P/K840P
3-14. Schematic Diagram – POWER Section –
F901
2.5V/250V : EXCEPT K740P:US,CND/K840P:US,CND,MX
6.3V/125V : K740P:US,CND/K840P:US,CND,MX
22
22