Sony HCD-VX550 / MHC-VX550 Service Manual ▷ View online
17
17
Note:
1. CD Block is basically designed to operate without adjustment. There-
fore, check each item in order given.
2. Use YEDS-18 disc (3-702-101-01) unless otherwise indicated.
3. Use an oscilloscope with more than 10 M
3. Use an oscilloscope with more than 10 M
Ω
impedance.
4. Clean the object lens by an applicator with neutral detergent when the
signal level is low than specified value with the following checks.
S-Curve Check
Procedure:
1. Connect oscilloscope to TP (FE).
2. Connect between TP (FE1) and TP (VC) by lead wire.
3. Connect between TP (AGCCON) and TP (GND) by lead wire.
4. Turn the power ON.
5. Load a disc (YEDS-18) and actuate the focus search. (In
1. Connect oscilloscope to TP (FE).
2. Connect between TP (FE1) and TP (VC) by lead wire.
3. Connect between TP (AGCCON) and TP (GND) by lead wire.
4. Turn the power ON.
5. Load a disc (YEDS-18) and actuate the focus search. (In
consequence of open and close the disc tray, actuate the focus
search)
search)
6. Cofirm that the oscilloscope waveform (S-curve) is symmetrical
between A and B. And confirm peak to peak level within
4 ± 1 Vp-p.
4 ± 1 Vp-p.
S-curve waveform
7. After check, remove the lead wire connected in step 2 and 3.
Note:
• Try to measure several times to make sure than the ratio of A : B
or B : A is more than 10 : 7.
• Take sweep time as long as possible and light up the brightness
to obtain best waveform.
RF Level Check
Procedure:
1. Connect oscilloscope to TP (RF).
2. Connect between TP (AGCCON) and TP (GND) by lead wire.
3. Turn the power ON.
4. Load a disc (YEDS-18) and press the
1. Connect oscilloscope to TP (RF).
2. Connect between TP (AGCCON) and TP (GND) by lead wire.
3. Turn the power ON.
4. Load a disc (YEDS-18) and press the
^ button to play.
5. Confirm that the oscilloscope waveform is clear and check RF
signal level is correct or not.
6. After check, remove the lead wire connected in step 2.
Note:
Clear RF signal waveform means that the shape “≈” can be clearly
distinguished at the center of the waveform.
distinguished at the center of the waveform.
CD SECTION
+
–
–
BD board
TP (FE)
TP (VC)
TP (VC)
oscilloscope
A
B
symmetry
within 4
±
1 Vp-p
+
–
–
BD board
TP (RF)
TP (VC)
TP (VC)
oscilloscope
VOLT/DIV: 200 mV
TIME/DIV: 500 ns
TIME/DIV: 500 ns
level:
1.45
1.45
±
0.3 Vp-p
E-F Balance (1 Track Jump) Check
Procedure :
1. Connect oscilloscpe to TP (TE) and TP (VC).
2. Turn the power ON.
3. Load a disc (YEDS-18) and playback the number five track.
4. Press the
1. Connect oscilloscpe to TP (TE) and TP (VC).
2. Turn the power ON.
3. Load a disc (YEDS-18) and playback the number five track.
4. Press the
^ (CD) button. (Becomes the 1 track jump mode)
5. Confirm that the level B and A (DC voltage) on the oscilloscope
waveform.
1 track jump waveform
Specified level:
×
100 = less than ± 22%
6. After check, remove the lead wire connected in step 1.
Checking Location:
BD BOARD (Side B)
A
B
+
–
–
BD board
TP (TE)
TP (VC)
TP (VC)
oscilloscope
A (DC voltage)
center of
waveform
waveform
B
0V
level = 1.3
±
0.6 Vp-p
symmetry
TP (AGCCON)
TP (RF)
TP (GND)
TP (FE)
IC103
IC102
IC101
TP (FE1)
TP (VC)
TP (TE)
VIDEO SECTION
Frequency Adjustment
Connection:
Procedure:
1. Connect the frequency counter to check point of the VIDEO
1. Connect the frequency counter to check point of the VIDEO
board.
2. Turned power switch on.
3. Press the FUNCTION button to select the CD.
4. Adjust CT503 on the VIDEO board so that the frequency counter
3. Press the FUNCTION button to select the CD.
4. Adjust CT503 on the VIDEO board so that the frequency counter
reading 27.0 MHz ± 80 Hz at stop status.
Adjustment Location:
VIDEO Board (SIDE B)
+
–
–
(27 MHz)
VIDEO board
frequency counter
IC505
CN501
CN502
SL501
SL503
100
81
1
30
31
50
51
80
SL502
D502
Check point
(27 MHz)
(GND)
CT503
VIDEO
Frequency
Adjustment
HCD-VX550
18
18
SECTION 7
DIAGRAMS
7-1. BLOCK DIAGRAM
CD SERVO SECTION
CD MECHANISM CONTROLLER
IC505 (1/2)
A/D
CONVERTER
5
4
7
2
1
5
10
6
6
7
8
16
14
13
10
11
22
4
3
27
23
26
5
6
2
3
15
16
17
18
A
E
B
C
D
A
A+5V
D+5V
F
DETECTOR
A
B
C
D
RF
SUMMING
AMP
FOCUS
ERROR AMP
RF EQ
AMP
TRACKING
ERROR AMP
RFO
FE
RF AMP,
FOCUS/TRACKING ERROR AMP
IC103
TE
E
F
F I-V AMP
E I-V AMP
LD. DRIVER
Q101
OPTICAL
TRANSCEIVER
IC381
CD DIGITAL OUT
OPTICAL
APC LD
AMP
APC PD
AMP
LD
LD
PD
LASER DIODE
RFAC
ASYO
ASYI
LPH
FILTER
FILO
PCO
CLTV
FILI
DIGITAL PLL
ASYMMETRY
CORRECTOR
EFM
DEMODULATOR
DIGITAL SIGNAL PROCESSOR
IC101 (1/2)
MDP
DIGITAL
CLV
PROCESSOR
32K
RAM
ERROR
CORRECTOR
INTERNAL BUS
SQCK
SQSO
MUTE
EXCK
PCMD
ADATA
BCLK
LRCK
C2PO
C4M
XTSL
XTAO
XTAI
BCK
LRCK
WDCK
C2PO
CTL1
LPH
MD2
DOUT
DIGITAL
OUT
D/A
DIGITAL
INTERFACE
CLOCK
GENERATOR
SUBCODE
PROCESSOR
SCOR
WFCK
XUGF
GFS
EMPH
SENSE
DATA
CLOK
XLAT
SBSO
SENSE CLK
SENSE
DSP CLK
DSP DATA
DSP LATCH
SE
TE
FE
RFDC
FOCUS/
TRACKING/SLED
SERVO DSP
FOCUS/TRACKING/SLED
PWM GENERATOR
SFDR
OPIN3(–)
OPIN4(+)
OPIN4(–)
VO3(+)
VO3(–)
VO4(+)
VO4(–)
VO2(+)
VO2(–)
VO1(+)
VO1(–)
OPIN2(+)
OPIN2(–)
OPIN1(+)
OPIN1(–)
20
9
STBY2
STBY1
SRDR
TFDR
TRDR
FFDR
FRDR
SSTP
COUT
S101
(LIMIT)
A+5V
MIRR,
DFCT, FOK
DETECTOR
SERVO AUTO
SEQUENCER
SERVO
INTERFACE
CPU INTERFACE
SCLK
TO CPU INTERFACE
FOK
MIRR
DFCT
M101
(SPINDLE)
MOTOR
DRIVE
XRST
LDON
DSP MUTE
MOTOR
DRIVE
COIL
DRIVE
COIL
DRIVE
M
M
M102
(SLED)
16
FOCUS/TRACKING COIL DRIVE,
SPINDLE/SLED MOTOR DRIVE
IC102
2-AXIS
DEVICE
(TRACKING)
(FOCUS)
DIGITAL SERVO
PROCESSOR
IC101 (2/2)
OPTICAL PICK-UP
(KSS-213D/Q-NP)
LDON
21
HOLD SW
PD
(Page 19)
•
SIGNAL PATH
: CD PLAY
: DIGITAL OUT
I-V AMP
12
11
13
14
CTRL1
CTRL2
CTL1
LPH
SUBQ DATA
SUBQ CLK
SCOR
MCLK
33.8MHz
B
(Page 19)
DATA, BCK,
LRCK, C2PO
C
(Page 19)
IC104
TBL-L
TBL-R
M
DISC TRAY TURN MOTOR DRIVE
IC701
OUT1
OUT2
IN1
IN2
M701
(DISC TRAY TURN)
SYSTEM CONTROLLER
IC501 (1/4)
LEVEL SHIFT
Q701
DISC IN DETECT
SENSOR
IC703
DISC TRAY
SENSOR
IC702
ROTARY
ENCODER
S811
DISC-SENS
OUT-OPEN
S801
(OPEN/CLOSE DET)
ENC1
ENC2
ENC3
T-SENS
CLOSE
OPEN
LOAD-OUT
LOAD-IN
M
MOTOR
DRIVE
MOTOR
DRIVE
DISC TRAY SLIDE MOTOR DRIVE
IC801
OUT1
OUT2
FIN
RIN
M801
(DISC TRAY SLIDE)
RESET
DEVICE RESET
XRESET
33
31
32
29
30
34
19
8
40 41 39 43
22
20
21
26
TO SERVO AUTO
SEQUENCER
50
53 55
XPCK
12
52 54
49
48
25
76 77
66
71
16
69
72
67
65
17
64
63
2
14
79 80
15
7
4 6 5
10 11 13 68
3
XRST
3 5 4
1
18
36 37
10
28
2
12
77
19
11
60
61
71
70 69 68
59
4 2 3
65 63
67
10
2
3
6
7
4
7
2
66
DISC TRAY
ADDRESS DETECT
+
+
T+
T–
F+
F–
HCD-VX550
19
19
AUDIO/VIDEO CD SECTION
PROGRAM ROM
IC508
16
• SIGNAL PATH
: CD PLAY (AUDIO)
: CD PLAY (VIDEO)
D/A
CONVERTER
INPUT
INTERFACE
CIRCUIT
OSC
BUFFER
IC510
LOW-PASS
FILER
IC515
IC515
LOW-PASS
FILER
MODE
CONTROL
TIMING CONTROL/
CLOCK GENERATOR
VIDEO FREQUENCY
(27MHz)
DIGITAL FILTER,
D/A CONVERTER
IC509
MPEG VIDEO/AUDIO DECODER,
VIDEO SIGNAL PROCESSOR
IC506
CD MECHANISM CONTROLLER
IC505 (2/2)
14
11
VOUTL
VOUTR
R-CH
10
RSTB
17
18
19
20
4
21
9
7
24
1
DATA
BCK
LRCK
CD-ROM
INTERFACE
CIRCUIT
MPEG
SYSTEM
DECODER
MPEG
VIDEO
DECODER
VIDEO
PROCESS
CIRCUIT
CPU INTERFACE
AUDIO
INTERFACE
CIRCUIT
MPEG
AUDIO
DECODER
D-RAM/ROM INTERFACE
CD-DATA
C2PO
DATA
BCK
LRCK
DATA, BCK,
LRCK, C2PO
LRCK, C2PO
CD-BCK
CD-LRCK
CD-C2PO
MA0 – MA10
VDATA0 – 7
VD0 – VD7
YUV0 – 7
MD0 – MD15
D0 – D15
D0 – D15
A0 – A18
A0 – A10
A11
384FSO
768FSO
MCKO
X503
27MHz
CT503
MD
XT2
XT1
17 15
16
19
82 86 85
22
20
33
31
24
13
16
161
180
184
182
128
185
167
178
169
166
177
157
158
DA-XCLK
SYS CLK
VCK-IN
DA-DATA
DA-BCK
DA-LRCK
ML
8
MC
LEVEL
SHIFT
IC501
IC501
B
(Page 18)
DATA, CLK
D
(Page 22)
MCLK 33.8MHz
A
(Page 18)
CD-L
E
(Page 21)
C
(Page 18)
C
Y
DIGITAL
FILTER,
NOISE
SHAPER
CIRCUIT
CIRCUIT
21 – 24, 27 – 32,20
A0 – A10
12 – 5, 27, 26, 23
A11–A17
A11 – A17
25, 4, 28, 29, 3, 2, 30
D0 – D7
O0 – O7
A0 – A10
DQ0 – DQ15
ADDRESS BUS
DATA BUS
D-RAM
IC507
A0 – A10
BA
13 – 15, 17 – 21
2,3,5,6,8,9,11,12,39,
40,42,43,45,46,48,49
54,58,60,64,68,72,74,78,
76,73,70,66,62,59,56,53
142,143,145,148,
150,152,154,155
WE
22
CE
RAS
CAS
18
CS
90
RESET
INT
8830 RESET
CL680 HINT
93
NT/PAL
TEST LED
CLK1
DATA1O
DATA1O
DATA
CLK
DF LATCH
NT/PAL OUT
29
30
I2C CLK
I2C DATA
I2C/RX
I2C/TX
SD-RAS
SD-CAS
SD-CSO
MWE
MCE
RESET
1
2
3
4
J301
S VIDEO OUT
J302
VIDEO OUT
XOUT
XIN
X501
10MHz
NTSC
AUTO
PAL
S501
SYSTEM SELECT
D502
(SELF DIAGNOSIS)
73
13
15
VSYNC
HSYNC
VSYNC
HSYNC
DATA
PCL
37
45
39
22
28
27
51
COUT
YOUT
VOUT
D/A
OSD
TIMING
CONTROL
Y/C
FILTER
3
17
18
16
4
20
19
1
D/A
CLK
ROSD
GOSD
BOSD
V-B
V-G
V-R
21
64 1
57
NTB
27MHz
HSY
VSY
VCLK
2
8
–
,
10
DIGITAL RGB ENCORDER
IC514
D/A CONVERTER
IC511
104,110,112,111,108,105,102,99,96,
100,98,114,116,118,120,121,122,124
HCD-VX550
20
20
TAPE DECK SECTION
PB EQ AMP
(DECK A)
IC611
PB LEVEL (L)
(DECK A)
REC-L
PB-L
CAPSTAN MOTOR
CONTROL SWITCH
Q1001
CAPSTAN
MOTOR DRIVE
Q336 – 343
1
F
(Page 21)
(Page 21)
L-CH
R-CH
R-CH
HP101
(PLAYBACK)
PB EQ AMP
(DECK B)
IC601
L-CH
R-CH
R-CH
16
R-CH
R-CH
HRPE101 (1/2)
(RECORD/PLAYBACK)
ALC
REC
EQ AMP
AMS
CIRCUIT
DOLBY NR
AMP
CIRCUIT
BIAS
CONTROL
CIRCUIT
DOLBY PASS
R-CH
L.P.F.
BUFFER
Q335
M
M1
(CAPSTAN)
HRPE101 (2/2)
(ERASE)
BIAS OSC
T621
B+
(A+7V)
R-CH
3
46
28
43
36
40
35
34
39
26
77
19 15 16 18 20 22 23 24 25
17
85 84 83 82 81 80 79 78
31
33
32
32
+
48
4
2
RV311
PB LEVEL (L)
(DECK B)
RV301
TAPE SPEED
(NORMAL)
RV1002
TAPE SPEED
(HIGH)
RV1001
REC LEVEL (L)
(DECK B)
RV301
REC BIAS (R)
(DECK B)
RV441
REC BIAS (L)
(DECK B)
BIAS OSC
Q621, 622
REC BIAS
SWITCH
Q623
ROTATION
DETECT SENSOR
(DECK A)
IC1001
RV341
BIAS
TRAP
C331, L331
REC/PB SWITCHING
IC602
SYSTEM CONTROLLER
IC501 (2/4)
DECK PROCESS
DECK A/B SELECT, PB/REC EQ AMP,
DOLBY NR AMP, ALC, AMS
IC301
AIN (L)
BIN (L)
MAOUT
PB OUT (L)
EQ OUT
(L)
MSIN
MSOUT
BIAS ON/OFF
70
120
BIAS (N)
BIAS (C)
BIAS (M)
S1004
A 120/70
B NORM/CROM
ALC ON/OFF
PB A/B
NORM/HIGH
NR ON/OFF
RM ON/OFF
REC/PB/PASS
LM ON/OFF
(DECK A 120/70)
88
S1003
(DECK A HALF)
S1001
(DECK A PLAY)
S1002
(DECK B PLAY)
S1008
(DECK B 120/70)
27
REC OUT (L)
ROUT (L)
RIN (L)
ALC (L)
EQ IN (L)
ALC
IN (L)
44
38
100
AMS-IN
91
A-SHUT
ROTATION
DETECT SENSOR
(DECK B)
IC1002
90
B-SHUT
TRIGGER
PLUNGER DRIVE
(DECK A)
Q333, 334
73
A-TRG
TC-MUTE
R/P-PASS
NR-ON/OFF
REC-MUTE
BIAS
EQ-H/N
PB-A/B
ALC-ON/OFF
TC-RELAY
A-PLAY-SW
B-PLAY-SW
A-HALF
89
S1006
(DECK B HALF)
S1009
(DECK B REC)
S1005
(DECK A REC)
B-HALF
TRIGGER PLUNGER
DECK A
TRIGGER
PLUNGER DRIVE
(DECK B)
Q331, 332
72
B-TRG
76
74
75
CAP-M-H/L
CAPM-CNT2
CAPM-CNT1
TRIGGER PLUNGER
DECK B
87
86
G
• SIGNAL PATH
: PLAYBACK (DECK A)
: PLAYBACK (DECK B)
: RECORD
D+5V
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