Sony HCD-VP1 Service Manual ▷ View online
13
CD SECTION
Notes:
1. CD block basically constructed to operate without adjustment. There-
fore, check each item in order given.
2. Use YEDS-18 disc (Part No.: 3-702-101-01) unless otherwise indicated.
3. Use the oscilloscope with more than 10 M
3. Use the oscilloscope with more than 10 M
Ω
impedance.
4. Clean an object lens by an applicator with neutral detergent when the
signal level is low than specified value with the following checks.
S-Curve Confirmation
Connection:
Procedure:
1. Connect an oscilloscope to IC703 pin !∞ and TP (VC) on the
1. Connect an oscilloscope to IC703 pin !∞ and TP (VC) on the
CD board.
2. Connect between TP (FOK) and TP (GND) on the CD board
by lead wire.
3. Turn the power ON.
4. Press the
4. Press the
[EJECT ]
(CD) button to open the disc tray, and
put the disc (YEDS-18).
5. Press the
[EJECT ]
(CD) button to close the disc tray (Actu-
ate the focus search).
6. Confirm that the waveform on the oscilloscope is symmetrical
between A and B and that peak to peak level is within 3.0 ±
1.0 Vp-p.
1.0 Vp-p.
S-curve waveform
7. After confirmation, disconnect the lead wire in step 2.
Note:
• Try to measure several times to make sure that 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 Confirmation
Connection:
Procedure:
1. Connect an oscilloscope to IC703 pin !§ and TP (VC) on the
1. Connect an oscilloscope to IC703 pin !§ and TP (VC) on the
CD board.
2. Turn the power ON.
3. Load the disc (YEDS-18), and press the
3. Load the disc (YEDS-18), and press the
[ ]
button to play-
back the disc.
4. Confirm that the waveform on the oscilloscope is clear and
that the RF signal level is correct.
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 board
IC703 pin
!∞
TP (VC)
oscilloscope
+
–
–
CD board
IC703 pin
!§
TP (VC)
oscilloscope
(AC range)
RF signal waveform
When observing the eye pattern, set the oscilloscope for AC range
and raise vertical sensitivity.
and raise vertical sensitivity.
Connecting Location:
– CD Board (Conductor Side) –
VOLT/DIV: 200 mV
TIME/DIV: 500 ns
(with the 10: 1 probe
in use)
TIME/DIV: 500 ns
(with the 10: 1 probe
in use)
level: 1.3 Vp-p
+0.25
–0.20
6
6
within 3.0 ± 1.0 Vp-p
A
B
symmetry
TP (GND)
TP (VC)
TP (FOK)
20
11
1
10
CN701
IC701
IC703
^
14
15
15
HCD-VP1
SECTION 5
DIAGRAMS
5-1.
BLOCK DIAGRAM – SERVO Section –
VCD BLOCK
(1/2)
A/D
CONVERTER
OUT+
OUT–
3
4
7
2
1
5
10
6
4
5
6
16
15
14
13
8
9
19
2
1
77
78
71
55
54
45
47
46
63
20
31
33
34
32
36
38
39
26
93
27
28
29
80
88
89
100
2
4
6
8
10
20
19
10
9
4
5
16
17
27
26
23, 24
E
B
C
D
A
A+5V
F
DETECTOR
A
B
C
D
RF
SUMMING
AMP
FOCUS
ERROR AMP
RF EQ
SWITCH
Q702
RF EQ
AMP
TRACKING
ERROR AMP
RFO
17
RFE
FE
FE BIAS
RF AMP,
FOCUS/TRACKING ERROR AMP
IC703
TE
E
F
F I-V AMP
E I-V AMP
AUTOMATIC
POWER
CONTROL
Q701
OPTICAL
TRANSCEIVER
IC308
OPTICAL
DIGITAL OUT (CD)
APC LD
AMP
APC PD
AMP
LD
LD
PD
LASER DIODE
RFAC
MIX
ASYO
ASYI
FILTER
FILO
PCO
CLTV
FILI
DIGITAL PLL
ASYMMETRY
CORRECTOR
EFM
DEMODULATOR
REGISTER
DIGITAL SIGNAL PROCESSOR
IC701 (1/2)
MON
MDP
MDS
94 95 96 97
FSW
CLV
PROCESSOR
18-TIMES
OVERSAMPLING
FILTER
NOISE
SHAPER
INTERNAL BUS
32K
RAM
ERROR
CORRECTOR
SUBQ
SQCK
83
SCLK
79
MUTE
76
EXCK
SUBCODE Q
PROCESSOR
SUBCODE P – W
PROCESSOR
SYNC
PROTECTOR
TIMING
GENERATOR 1
TIMING
GENERATOR 2
DATA
VCKI
XTAO
62
XTAI
BCLK
LRCK
LRCK
RFCK
GFS
56
C2PO
DOUT
DIGITAL
OUT
SERIAL/PARALLEL
PROCESSOR
D/A DIGITAL
PROCESSOR
CLOCK
GENERATOR
ADDRESS
GENERATOR
PRIORITY
ENCODER
ENCODER
PEAK
DETECTOR
74
SCOR
81
73
WFCK
75
SBSO
SE
TE
FE
RFDC
FOCUS/TRACKING/SLED
SERVO DSP
FOCUS/TRACKING/SLED
PWM GENERATOR
SFDR
IN+
IN–
OUT+
OUT–
IN–
IN+
IN–
IN+
15
MUTE
SRDR
TFDR
TRDR
FFDR
FRDR
COUT
MIRR/DFCT/
FOK
DETECTOR
SERVO AUTO
SEQUENCER
SERVO
INTERFACE
CPU
INTERFACE
CLOK
86
DATA
87
XLAT
SENS
FOK
91
92
MIRR
DFCT
IN+, IN–
OUT+
OUT–
M101
(SPINDLE)
MOTOR
DRIVE
LDON
MUTE
MOTOR
DRIVE
COIL
DRIVE
OUT–
OUT+
COIL
DRIVE
M
M
M102
(SLED)
05
FOCUS/TRACKING COIL DRIVE,
SPINDLE/SLED MOTOR DRIVE
IC702
2-AXIS
DEVICE
(TRACKING)
(FOCUS)
DIGITAL SERVO
PROCESSOR
IC701 (2/2)
OPTICAL PICK-UP
(KSS-213C/K1N)
LDON
PD
•
SIGNAL PATH
: CD PLAY (AUDIO)
: CD PLAY (VIDEO)
I-V AMP
12
13
2
1
SUBQ
SQCK/SCLK
SCOR
VARI-PITCH
DOUBLE SPEED
IC704
D+5V
S901
(DISC TRAY CLOSE DET)
S902
(DISC TRAY OPEN DET)
IN1
TR-OPEN
OUT1
DISC TRAY OPEN/CLOSE
MOTOR DRIVE
IC309
SW-CLOSE
SW-OPEN
5
2
IN2
TR-CLOSE
OUT2
6
10
M
M901
DISC TRAY
OPEN/CLOSE
FOK
SENS
DATA
CLK
XTL
XRST
XRST
PAL
AUTO
NTSC
SW401
SYSTEM SELECT
CTRL2
XTAL 16.9344MHz
AD
BCK
LRCK
C2PO
DO
DO
VIDEO OUT
J401
VIDEO OUT
A +5V
S701
(LIMIT)
: DIGITAL OUT
LIMIT
GFS
VIDEO SYSTEM
F
(Page 17)
CD L-CH
L-OUT
R-OUT
R-CH
15 11 100 17 13 12
S-REQ
S-CLK
S-ACK
RST
S-SO
S-SI
S-REQ
S-CLK
S-ACK
RST
S-SO
S-SI
SYSTEM CONTROLLER
IC801 (1/4)
16
HCD-VP1
16
5-2.
BLOCK DIAGRAM – TAPE Section –
05
C
(Page 18)
B
(Page 17)
A
(Page 17)
•
SIGNAL PATH
: TAPE RECORD
: TAPE PLAY
REC-BIAS
REC-MUTE
DOLBY
L-MUTE
REC/PB
MOT-CON
BIAS
R/MUTE
NR-ON
L/M
R/P
(CrO
2
DET)
DECK A/B
SELECT
REC/PB
Q351
REC/PB SWITCHING
IC350
DECK PROCESS,
DOLBY NR AMP
IC352
R-CH
R-CH
L-CH
(RECORD/PLAYBACK)
R-CH
R-CH
N
N/C/M
C
M
10
86
87
88
96
95
19
20
18
25 24 23
17
16
15
35
32
37
41
39
4
8
7
9
(ERASE)
(HALF DET (SIDE-A))
(HALF DET (SIDE-B))
(CASSETTE IN DET)
(HEAD POSITION DET)
Q352
REC/PB
PB-L
REC-L
Q353
Q354
Q356
Q355
PLAYBACK
EQ AMP
IC351
DOLBY NR
AMP
CIRCUIT
BIAS SWITCH
CIRCUIT
RV151
PLAYBACK
LEVEL (L)
RV152
RECORD
LEVEL (L)
33, 34
BIAS
TRAP
CAPSTAN/REEL
MOTOR DRIVE
Q657, 659
TAPE-END
1
T-MODE
6
TC-SW
32
TAPE END DETECT
SENSOR
T150
BIAS OSC
T351
+8V
RECORD
BIAS (L)
BIAS OSC
Q357, 358
REC BIAS
SWITCH
Q359, 360
RV153
RECORD
BIAS (R)
BIAS (R)
RV253
M
(CAPSTAN/REEL)
SOL-CON
30
TRIGGER
PLUNGER DRIVE
Q656, 658
(TRIGGER PLUNGER)
SYSTEM CONTROLLER
IC801 (2/4)
Click on the first or last page to see other HCD-VP1 service manuals if exist.