Sony CMT-CP2W / HCD-CP2 (serv.man2) Service Manual ▷ View online
17
CD SECTION
Note:
1.
CD Block is basically constructed to operate without
adjustment. Therefore, check each item in order given.
adjustment. Therefore, 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
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.
when the signal level is low than specified value with the
following checks.
5.
Adjust the focus bias adjustment when optical block is replaced.
Focus Bias Check
Procedure :
1.
1.
Connect oscilloscope to TP (RF) and TP (GND) on CD board.
2.
Turned Power switch on.
3.
Put disc (YEDS-18) in and press the
[CD ]
button to play-
back.
4.
Confirm that oscilloscope waveform is as shown in the figure
below. (eye pattern)
A good eye pattern means that the diamond shape (
below. (eye pattern)
A good eye pattern means that the diamond shape (
) in the
center of the waveform can be clearly distinguished.
Adjustment Location:
+
–
–
BD board
TP (RF)
TP (VC)
TP (VC)
oscilloscope
(DC range)
VOLT/DIV: 200 mV
TIME/DIV: 500 ns
TIME/DIV: 500 ns
level:
1.2
1.2
±
0.1 Vp-p
TP (RF)
IC701
IC703
TP (GND)
– CD BOARD (Conductor Side) –
u
s
18
19
19
HCD-CP2
SECTION 7
DIAGRAMS
7-1.
BLOCK DIAGRAM – CD Section –
A
B
D
F
E
C
I-V AMP
DETECTOR
39
38
17
18
26
27
2
SL+
SL–
SL O
F–
F+
T+
T–
SPINDLE
MOTOR DRIVE
M701
(SPINDLE)
SLED
MOTOR DRIVE
1
M702
(SLED)
FOCUS
COIL DRIVE
TRACKING
COIL DRIVE
SP+
SPO
MUTE
SP–
9
15
14
3
20
25
FIN
(TIN)
SLIN
SPIN
SPIN
SL P
FOCUS/TRACKING COIL DRIVE,
SPINDLE/SLED MOTOR DRIVE
IC702
16
14
SLED
AMP
LD
PD
LASER DIODE
OPTICAL PICK-UP
(KSS-213C/K1N)
2-AXIS
DEVICE
(FOCUS)
(TRACKING)
33
32
27
35
18
22
20
21
19
23
RF AMP,
FOCUS/TRACKING
SERVO
IC701 (1/2)
FOCUS OK
COMPARATOR
MIRR
AMP
DEFECT
AMP
FOCUS OK
AMP
IIL DATA REGISTER
31
29
FILTER
33
30
FILO
PCO
CLTV
FILI
XPCK/MNTO/XPCK
DIGITAL PLL
ASYMMETRY
CORRECTION
CORRECTION
EFM
DEMODULATOR
DIGITAL
OUT
ERROR
CORRECTOR
16K
RAM
INTERNAL BUS
SUB-CODE
PROCESSOR
OSC
CLOCK
GENERATOR
SERVO AUTO SEQUENCER
DIGITAL
CLV
14
12
41
43
39
13
79
5 4
6
7 9 8
57 58 59
62
70
11
10
41
42
36
37
1
40
45
2
47
12
11
6
25
24
13
PD1
PD1 I-V AMP
RF O
RF
37
ASYI
38
48
ASYO
FOK
DATO
CLKO
XLTO
SEIN
CNIN
MDP
SQSO
SQCK
SENS
DATA
CLOK
XLAT
XLON (MUTE)
SPOA (LIMIT)
SCOR
SBSO
EXCK
RFCK/MNT1/XUGF
WFCK
EMPH
EMPHI
SYSM (MUTE)
XTAI
71
XTAO
RF I
FOK
DATA
CLK
SENS1
26
SENS2
C.OUT
XLT
LOCK
PD2 I-V AMP
PD2
TTL
IIL
FEO
TEO
PD
FEI
FE O
TA O
TEI
TTL
IIL
TTL
IIL
XRST
FOCUS
ERROR
AMP
RF
SUMMING
AMP
TRACKING
ERROR
AMP
TRACKING PHASE
COMPENSATION
FOCUS PHASE
COMPENSATION
AUTOMATIC
POWER CONTROL
Q701
I-V
AMP
LD
AMP
PD
AMP
FE BIAS
F
E
LD
PCMD
53
DOUT
BCK
LRCK
PCMDI
BCKI
LRCKI
42
44
40
50
GTOP/
C2PO/
C2PO
SLED SERVO
IC701 (2/2)
05
DIGITAL SIGNAL PROCESSOR,
CLV SERVO, D/A CONVERTER
IC703
SYSTEM CONTROLLER
IC802 (1/4)
• SIGNAL PATH
: CD PLAY (ANALOG OUT)
21
CPU INTERFACE
D/A INTERFACE
SERIAL
INPUT
INTERFACE
PWM
PWM
OVER
SAMPLING
DIGITAL
FILTER
NOISE
SHAPER
56
54
55
AOUT2
65
XTSL
51
C4M
52
AOUT1
AIN2
R-CH
CD L-CH
AIN1
LOUT2
LOUT1
76
75
66
74
67
XROF/MNT3/GFS
X701
16.9344MHz
49
47
: CD PLAY (DIGITAL OUT)
R-CH : Same as L-CH.
+
M
M
XRST
A
(Page 21)
C-MUTE 69
C-SCOR
62
C-XLA
T
67
C-CLK
76
C-DA
TA
77
CD-SENS1
54
C-SQCK
51
C-SQSO
52
4
SENS2
55
C-XRST
17 15
7
A
D
C
B
F
E
LD
PD
T+
T–
F+
F–
B+
S701
(LIMIT)
OPTICAL
TRANSCEIVER
IC308
OPTICAL
DIGITAL
OUT (CD)
20
HCD-CP2
20
7-2.
BLOCK DIAGRAM – TAPE DECK Section –
PB EQ AMP
(DECK A)
IC611
PB LEVEL (L)
(DECK A)
REC-L
REC/PB
PB-L
CAPSTAN MOTOR
CONTROL SWITCH
Q651
1
B
(Page 21)
(Page 21)
L-CH
R-CH
R-CH
HP101
(PLAYBACK)
PB EQ AMP
(DECK B)
IC601
L-CH
R-CH
R-CH
05
R-CH
R-CH
HRPE101 (1/2)
(RECORD/PLAYBACK)
REC
EQ AMP
AMS
CIRCUIT
DOLBY NR
AMP
CIRCUIT
BIAS
CONTROL
CIRCUIT
DOLBY PASS
R-CH
L.P.F.
BUFFER
Q406
M
M1
(CAPSTAN)
HRPE101 (2/2)
(ERASE)
BIAS OSC
T621
B+
(A+8V)
R-CH
3
4
28
6
11
8
9
21
15
12 20 16 17 18 19 14
13
1 75 7 79 78 8 80
23
25
24
24
+
2
4
2
RV311
PB LEVEL (L)
(DECK B)
RV301
TAPE SPEED
(NORMAL)
RV651
TAPE SPEED
(HIGH)
RV652
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)
Q1001
RV341
BIAS
TRAP
C331, L331
REC/PB SWITCHING
IC602
SYSTEM CONTROLLER
IC802 (2/4)
DECK PROCESS
DECK A/B SELECT, PB/REC EQ AMP,
DOLBY NR AMP
IC401
AIN (L)
BIN (L)
MAOUT
PBOUT (L)
EQOUT
(L)
MSIN
MSOUT
BIAS-ON/OFF
70
120
NORM
CROM
METAL
S1004
A 120/70
NORM/CROM/METAL
PB-A/B
LM-ON/OFF
NR-ON/OFF
RM-ON/OFF
REC/PB/PASS
NORM/HIGH
(DECK A 120/70)
14
S1003
S1001
(DECK A PLAY)
S1002
(DECK B PLAY)
(DECK A HALF)
S1008
(DECK B 120/70)
27
RECOUT (L)
RIN (L)
EQIN (L)
10
68
16
TC-SHUT (A)
ROTATION
DETECT SENSOR
(DECK B)
Q1002
17
TC-SHUT (B)
NORMAL/HI
REC/PB
DOLBY
REC-MUTE
REC-BIAS
LINE MUTE
A/B
REC/PB
T-PLAY (A)
T-PLAY (B)
T-HALF (A)
39
S1006
(DECK B HALF)
S1009
(DECK B REC)
S1005
(DECK A REC)
D+5V
D+5V
T-MODE
10
CAP MOTOR H/L
CAPSTAN
MOTOR CONTROL
Q403, 407
TRIGGER
MOTOR CONTROL
Q408, 409
9
CAP MOTOR CON
15
18
C
(Page 22)
D
• SIGNAL PATH
: PLAYBACK (DECK A)
: PLAYBACK (DECK B)
: RECORD
R-CH : Same as L-CH
TRIG MOTOR CON (B)
TRIG MOTOR CON (A)
M
5
6
2
4
10
MOTOR
DRIVE
TRIGGER MOTOR DRIVE
IC402
OUT1
VZ
OUT2
IN1
IN2
M2
(TRIGGER)
11
12
TRIG MOTOR H/L
13
3
HI DUB REC
LED DEIVE
Q816
D822
HI-SPEED
DUBBING
+12V (M)
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