HCD-VX550

HCD-VX550
SERVICE MANUAL
Chinese Model
HCD-VX550 is the Amplifier, Video
CD player, Tape Deck and Tuner
section in MHC-VX550.
Dolby noise reduction manufactured under license
from Dolby Laboratories Licensing Corporation.
“DOLBY” and the double-D symbol a are trademarks of Dolby Laboratories Licensing Corporation.
Model Name Using Similar Mechanism
CD
Section
CD Mechanism Type
Base Unit Name
CDM38LH-5BD36L
BU-26BD36L
Optical Pick-up Name
Tape deck
Section
NEW
Model Name Using Similar Mechanism
Tape Transport Mechanism Type
KSS-213D/Q-RP
HTC-V5550
TCM-230AWR2
SPECIFICATIONS
Amplifier section
The following measured at AC 120, 220, 240 V 50/60
Hz
DIN power output (rated)110 + 110 W
(8 Ω at 1 kHz, DIN)
Continuous RMS power output (reference)
140 + 140 W
(8 Ω at 1 kHz, 10% THD)
Inputs
MD IN:
(phono jacks)
VIDEO (AUDIO) IN:
(phono jacks)
MIC 1/2 (phone jack):
voltage 450 mV,
impedance 47 kΩ
voltage 250 mV,
impedance 47 kΩ
sensitivity 1 mV, impedance
10 kΩ
Outputs
MD OUT (phono jacks): voltage 250 mV
impedance 1 kΩ
VIDEO OUT (phono jack):
max,output level
1Vp-p, unbalanced, Sync
negative, load impedance
75 Ω
S-VIDEO OUT (4-pin/ mini-DIN jack):
Y: 1Vp-p, unbalanced,
Sync negative,
C: 0.286Vp-p,
load impedance 75 Ω
PHONES (stereo phone jack):
accepts headphones of 8 Ω
or more
SPEAKER:
accepts impedance of 8 to
16 Ω
SUPER WOOFER
Voltage 1 V, impedance1
kΩ
SUPER VIDEO CD/VIDEO CD
/CD player section
System
Compact disc and digital
audio and video system
Laser
Semiconductor laser
(λ=780nm)
Emission duration:
continuous
Laser output
Max. 44.6 µW*
*This output is the value
measured at distance of 200
mm from the objective lens
surface on the Optical Pick-up
Block with 7 mm aperture.
Frequency response
2 Hz - 20 kHz (±0.5 dB)
Wavelength
780 -790 nm
Signal-to-noise ratio
More than 90 dB
Dynamic range
More than 90 dB
Video color system format
NTSC, PAL
Continued on next page
MINI Hi-Fi COMPONENT SYSTEM
MICROFILM
HCD-VX550
7-4. SCHEMATIC DIAGRAM
BD BOARD
• Refer to page 29 for Waveforms.
• Refer to page 45, 46 for IC Block Diagrams.
(Page 26)
• Voltages and waveforms are dc with respect to ground
under no-signal conditions.
no mark : CD STOP
(
) : CD PLAY
The components identified by
mark ! or dotted line with mark
! are critical for safety.
Replace only with part number
specified.
25
25
HCD-VX550
7-5. SCHEMATIC DIAGRAM
VIDEO (1/2) BOARD
• Refer to page 29 for Waveforms.
• Refer to page 52 for IC Pin Function Description.
• Refer to page 28 for Printed Wiring Board.
(Page 25)
(Page 36)
• Voltages and waveforms are dc with respect to ground
under no-signal conditions.
no mark : VIDEO CD PLAY
26
26
HCD-VX550
7-6. SCHEMATIC DIAGRAM
VIDEO (2/2) BOARD
• Refer to page 29 for Waveforms.
• Refer to page 54 for IC Pin Function Description.
• Refer to page 47 for IC Block Diagram.
• Refer to page 28 for Printed Wiring Board.
IC504
+3.3V REG
• Voltages and waveforms are dc with respect to ground
under no-signal conditions.
no mark :VIDEO CD PLAY
: Impossible to measure
∗
27
27
HCD-VX550
7-9. SCHEMATIC DIAGRAM
CD MOTOR SECTION
• Refer to page 46 for IC Block Diagrams.
DISC TRAY
ADDRESS DETECT
DISC TRAY SLIDE
CLOSE
OPEN
B
(Page 36)
(DISC TRAY SLIDE)
DISC
TRAY
TURN
DISC IN DETECT
SENSOR
DISC TRAY
SENSOR
DISC TRAY TURN
MOTOR DRIVER
C
(Page 36)
16
LEVEL SHIFT
31
31
• Voltages are dc with respect to ground under no-signal
conditions.
no mark : CD STOP
HCD-VX550
7-11.
SCHEMATIC DIAGRAM
AUDIO BOARD
• Refer to page 48 for IC Block Diagram.
PB EQ AMP
(DECK A)
(PLAYBACK)
PB LEVEL (L)
(DECK A)
PB LEVEL (R)
(DECK A)
PB EQ AMP
(DECK B)
PB LEVEL (L)
(DECK B)
PB LEVEL (R)
(DECK B)
D
(Page 38)
SWITCHING
REC BIAS (R)
(DECK B)
REC BIAS (L)
(DECK B)
REC BIAS
-6.8
• Voltages are dc with respect to ground under no-signal
conditions.
no mark : TAPE PLAY
(
) : RECORD
BIAS OSC
The components identified by
mark ! or dotted line with mark
! are critical for safety.
Replace only with part number
specified.
16
33
33
HCD-VX550
7-12.
PRINTED WIRING BOARD
LEAF SW BOARD
• Refer to page 23 for Circuit Boards Location.
• Semiconductor Location
DECK A
PLUNGER
4
(
DECK B
PLUNGER
)
3
4
3
1
2
1
2
(DECK B 120/70)
(DECK A PLAY)
(DECK B REC)
(DECK B PLAY)
(DECK B HALF)
12
16
(DECK A 120/70)
(DECK A HALF)
12
(DECK A REC)
E
7-13.
SCHEMATIC DIAGRAM
(Page 35)
LEAF SW BOARD
CONTROL SWITCH
(CAPSTAN)
DECK B
PLUNGER
DECK A
PLUNGER
ROTATION DETECT SENSOR
(DECK A)
(DECK A 120/70)
ROTATION DETECT
SENSOR (DECK B)
(DECK A HALF)
E
(DECK A REC)
(Page 38)
(DECK B HALF)
(DECK B REC)
(DECK B 120/70)
(DECK A PLAY)
(DECK B PLAY)
• Voltages are dc with respect to ground under no-signal
conditions.
no mark : TAPE PLAY
(
) : RECORD
: Impossible to measure
∗
16
34
34
Ref. No.
Location
Ref. No.
Location
D141
D191
D331
D333
D334
D335
D401
D403
D405
D406
D407
D411
D501
D502
D503
D504
D505
D506
D507
D509
D607
D644
D801
D802
D803
D831
D832
D851
D852
D881
D901
D902
D903
D904
D905
D906
D907
D908
D909
D910
D915
D917
D919
D921
D922
D923
D924
E-10
D-12
E-1
F-1
E-1
F-1
G-11
F-12
H-6
I-4
I-2
G-1
D-7
E-6
D-6
D-7
D-7
D-7
E-6
F-2
E-5
C-8
I-11
G-9
G-11
I-6
I-7
I-10
G-9
H-9
I-4
I-4
I-4
I-4
I-1
H-1
I-5
I-5
I-5
I-5
I-4
F-4
H-3
H-4
G-4
G-4
F-2
IC101
IC301
IC381
IC501
IC502
IC801
IC901
IC902
IC903
IC904
C-10
B-3
A-12
D-5
D-7
H-10
G-6
G-4
H-4
H-3
Q111
Q112
Q113
Q161
Q162
Q163
Q191
Q192
Q201
Q251
Q331
Q332
Q333
Q334
Q335
Q336
Q337
Q338
Q339
Q340
Q341
Q342
Q343
Q401
Q402
Q411
Q412
Q431
Q432
Q433
Q434
Q435
Q436
Q437
Q439
Q471
Q501
Q508
Q509
Q801
Q803
Q804
Q831
Q832
Q851
Q881
Q901
Q902
Q903
Q904
Q905
Q909
Q911
Q912
Q913
Q914
Q923
Q951
Q952
D-10
D-10
E-9
C-9
C-9
E-9
D-12
E-10
D-9
C-9
C-1
C-2
C-2
C-2
D-1
F-1
F-1
F-1
F-1
E-1
E-1
F-1
E-1
F-12
E-12
G-1
G-1
G-12
G-11
F-11
F-11
F-11
F-11
G-12
F-12
F-2
D-7
D-7
E-7
H-10
G-10
G-9
G-10
G-10
I-10
I-9
H-2
I-1
H-1
G-4
G-4
I-4
G-3
G-4
H-1
G-2
H-1
G-2
H-1
HCD-VX550
7-15.
SCHEMATIC DIAGRAM
MAIN (1/4) BOARD
• Refer to page 35 for Printed Wiring Board.
(Page 44)
(Page 37)
(Page 26)
(Page 31)
(Page 39)
• Voltages are dc with respect to ground under no-signal
(detuned) conditions.
no mark : TUNER (FM/AM)
(
) : CD PLAY
(Page 31)
16
(Page 38)
36
36
HCD-VX550
7-16.
SCHEMATIC DIAGRAM
MAIN (2/4) BOARD
• Refer to page 35 for Printed Wiring Board.
D3001
11ES2
D3002
11ES2
(Page 36)
(Page 43)
(Page 38)
16
The components identified by
mark ! or dotted line with mark
! are critical for safety.
Replace only with part number
specified.
(Page 39)
• Voltages are dc with respect to ground under no-signal
(detuned) conditions.
no mark : TUNER (FM/AM)
37
37
HCD-VX550
7-17.
SCHEMATIC DIAGRAM
MAIN (3/4) BOARD
• Refer to page 35 for Printed Wiring Board.
(Page 36)
(Page 37)
(Page 39)
(Page 43)
CN371
15P
(Page 41)
(Page 39)
(Page 33)
• Voltages are dc with respect to ground under no-signal
conditions.
no mark : TUNER (FM/AM)
(
) : CD PLAY
{
} : PLAYBACK (DECK A)
[
] : PLAYBACK (DECK B)
〈〈
〉〉 : RECORD
(Page 34)
16
38
38
HCD-VX550
7-18.
SCHEMATIC DIAGRAM
MAIN (4/4) BOARD
• Refer to page 35 for Printed Wiring Board.
• Refer to page 49 for IC Pin Function Description.
(Page 37)
(Page 36)
(Page 38)
D+5V
GND
VDD
CD POWER
L
(Page 42)
(Page 38)
• Voltages and waveforms are dc with respect to ground
under no-signal (detuned) conditions.
no mark : TUNER (FM/AM)
(
) : CD PLAY
{
} : PLAYBACK (DECK A)
[
] : PLAYBACK (DECK B)
〈〈
〉〉 : RECORD
39
39
HCD-VX550
7-20.
SCHEMATIC DIAGRAM
PANEL BOARD
• Refer to page 48 for IC Block Diagrams.
• Refer to page 58 for IC Pin Function Description.
(Page 42)
(Page 38)
16
• Voltages and waveforms are dc with respect to ground
under no-signal (detuned) conditions.
no mark : TUNER (FM/AM)
41
41
HCD-VX550
7-21.
PRINTED WIRING BOARD
CD SW/5V POWER BOARD
7-22.
SCHEMATIC DIAGRAM
CD SW/5V POWER BOARD
• Refer to page 23 for Circuit Boards Location.
(Page 41)
16
(Page 40)
(Page 35)
4.7 7.3
7.3
(Page 39)
9.3
16
27
42
42
8.1
5.0
HCD-VX550
7-23.
PRINTED WIRING BOARD
TRANSFORMER BOARD
• Refer to page 23 for Circuit Boards Location.
• Semiconductor
Location
Ref. No.
(Page 35)
(Page 35)
27
16
7-24.
SCHEMATIC DIAGRAM
TRANSFORMER BOARD
(Page 37)
• Voltages are dc with respect to ground under no-signal
(detuned) conditions.
no mark : TUNER (FM/AM)
(Page 38)
The components identified by
mark ! or dotted line with mark
! are critical for safety.
Replace only with part number
specified.
16
43
43
Location
D971
D972
D973
A-2
A-1
A-1
Q971
A-1
HCD-VX550
7-25.
PRINTED WIRING BOARD
SURROUND BOARD
7-26.
SCHEMATIC DIAGRAM
SURROUND BOARD
• Refer to page 47 for IC Block Diagrams.
• Refer to page 23 for Circuit Boards Location.
(Page 36)
16
• Voltages and waveforms are dc with respect to ground
under no-signal (detuned) conditions.
no mark : TUNER (FM/AM)
16
(Page 35)
44
44
7-27.
IC BLOCK DIAGRAMS
BD Board
V16M
VCTL
BIAS
AVDD1
PCO
FILI
FILO
CLTV
AVSS1
RFAC
ASYI
ASYO
AVDD0
IGEN
AVSS0
ADIO
RFDC
CE
TE
CXD3008Q
VPCO
60
59 58
57 56 55 54 53 52
51 50 49 48
47 46 45 44 43 42 41
DVDD2 61
ASYE 62
MD2 63
OSC
DOUT 64
LRCK 65
PCMD 66
BCK 67
D/A DIGITAL
INTERFACE
EFM
DEMODULATOR
32K
RAM
EMPH
XTSL
DVSS2
XTAI
XTAO
ASYMMETRY
CORRECTOR
68
69
70
71
72
ERROR
CORRECTOR
CLOCK
GENERATOR
FOCUS
SERVO
DSP
FOCUS
PWM
GENERATOR
TRACKING
SERVO
DSP
SLED
SERVO
DSP
TRACKING
PWM
GENERATOR
SLED
PWM
GENERATOR
SUBCODE
PROCESSOR
SOUT 73
SOCK 74
XOLT 75
76
77
78
79
80
6
7
8 9 10 11 12 13 14 15 16 17 18 19 20
SCLK
ATSK
WFCK
XUGF
XPCK
GFS
C2PO
SCOR
C4M
WDCK
DVSS0
COUT
MIRR
DATA
5
SENS
4
XLAT
3
CLOK
2
XRST
DVDD0
1
MUTE
CPU
INTERFACE
40
39
38
37
36
35
34
SE
TE
VC
TES1
TEST1
DVSS1
FRDR
33 FFDR
32 TRDR
31 TFDR
30 SRDR
29 SFDR
28 DVDD1
27 FSTO
26 SSTP
SERVO INTERFACE
SERVO
AUTO
SEQUENCER
SQSO
SQCK
SCSY
SBSO
EXCK
OPERATIONAL
AMPLIFIER &
ANALOG SWITCH
DIGITAL
PLL
DIGITAL
OUT
A/D
CONVERTER
IC101
DIGITAL
CLV
PROCESSOR
25 MDP
24 LOCK
23 PWMI
MIRR, DFCT,
FOK
DETECTOR
22 FOK
21 DFCT
45
IC103
CXA2568M-T6
VCC
HOLD 1
VCC
APC PD AMP
+
–
24 VCC
23 LC/PD
APC LD AMP
VEE
22 LD ON
+
–
+
–
+
–
21 HOLD SW
20 AGC CONT
VEE
AGC VTH 2
50µA
LD 3
VCC
+
–
PD 4
19 RF BOT
VC
+
–
+
–
+
–
VC
A 5
+
–
B 6
VEE
18 RFTC
RF SUMMING AMP
C 7
+
–
VC
RF EQ AMP
VC
+
–
17 RF I
16 RF O
D 8
15 RFE
VC
FOCUS ERROR AMP
VEE
VEE 9
+
–
14 FE
VC
VC
+
–
F 10
–
+
–
+
E 11
VC
VC
VC BUFFER
VC 12
13 TE
TRACKING
ERROR AMP
VC
VEE
+
–
VCC
VC
MOTOR (TURN) BOARD
MOTOR (SLIDE) BOARD
IC701
IC801
M54641L
VCC 1
OUT2 2
RIN 2
8 VCC
VREF 3
OUT2 4
INPUT
AMP.
RNF 5
CONTROL
POWER AMP.
INPUT
AMP.
GND 6
7 OUT1
OUT1 7
VM 8
POWER AMP.
GND 4
6 IN2
5 REFERENCE
VCC 9
FIN 10
46
POWER
SAVE
GND 1
REG
IN1 3
BA6286N
TSD
CONTROL
LOGIC
VIDEO BOARD
IC509
PCM1727E-2/T2
384fs
CLOCK MANAGER
•
DUAL PLL
XT1 1
PGND 2
VCP 3
24 XT2
23
22
21
20
POWER
SUPPLY
NCKO 4
RSV 5
SCKO3 6
ML
MC
MC
RSTB
DGND
VDD
SCKO1
SCKO2
19 LRCK
AUDIO
DATA INPUT
INTERFACE
7
8
9
10
18 DATA
17 BCK
MODE
CONTROL
OPEN
8 TIME OVER
SAMPLING DIGITAL
FILTER
•
FUNCTION
CONTROL
BPZ
CONTROL
VOUTR 11
16 ZERO
15 CAP
14 VOUTL
MULTI LEVEL
∆Σ
MODULATOR
MULTI LEVEL
∆Σ
MODULATOR
5 LEVEL
DAC
5 LEVEL
DAC
CR LPF
•
OUTPUT
AMP
CR LPF
•
OUTPUT
AMP
13 VCA
AGND 12
SURROUND BOARD
LV1150
EF-VOL
L-OUT
R-OUT
AGND
D/A
NS
13
A/D
14
VDD
15
LC-INB
24 23 22 21 20 19 18 17 16
LC-INE
VREF
DC-CUT
IC1201
ADM
S-RAM
ADM-CONT
+
+
R+DELAY
L+DELAY
–
L–R
+
LOW-PASS
FILTER
VIRTUAL
1 2 3 4
5 6 7 8 9 10
11 12
LPF2
LS-CUT
R-PS-IN
VCC
L-PS-IN
RS-OUT
L-IN
R-IN
L+R
VSS
SW1
SW2
LPF1
OSC
47
AUDIO BOARD
IC602
µPC1330HA
INVERTER
COMPARATER
2
1
4
3
SW P1 CONT
SW R1 GND
5
6
GND
VCC
7
8
SW P2 GND
9
SW R2
PANEL BOARD
IC604
BA3830F
NJU3716M-T2
VDD
P6
P5
P4
P3
P2
VSS
P1
CLR
STB
CLK
DATA
IC603
R02
1
REFERENCE
CURRENT
R01
2
REFERENCE
CURRENT
LINE NF
3
LINE IN
4
RESET
17
16
15
14
13
12
BAND
PASS
FILTER
–
+
DET
6
11 REC LEVEL
7
8
9
CLOCK
REF
OP2IN
OP2OUT
LPF2IN
LPF2OUT
M65850FP
VCC
IC711
14
13
12
11
10
9
8
OSCILLATOR
D/A
LPF2
1/2 VCC
DO1
CLOCK
AUTO
RESET
MAIN
RESET
CONTROL
D1
DO0
MO
20KBIT
SRAM
MI
A/D
1
2
3
4
5
6
7
LPF1IN
LPF1OUT
OP1OUT
OP1IN
CC1
CC2
GND
LPF1
48
SHIFT REGISTER
LATCH CIRCUIT
–
+
10 VCC
RESET C
BIAS C
GND
CONTROL
CIRCUIT
OUTPUT CIRCUIT
1 2 3 4 5 6 7 8 9 10 11
12
SO
5
REC IN
F01
F02
F03
F04
F05
F06
24 23 22 21 20 19 18 17 16 15 14 13
P7
P8
P9
P10
P11
VSS
P12
P13
P14
P15
P16
REC NF
18 RESET