Panasonic SA-AK785, Service Manual

Page: 97 / 143

16 Schematic Diagram
16.1. CD Servo Circuit
28
VREF
TP
TP
TP
TP
TP TP
TP TP
TP TP TP TP
TP
TP TP
TP
TP
TP
TP
TP
TP
TP
TP
TP
TP
TP
TP
TP
TP
TP
TP
TP
TP
TP
C7231
6.3V220
1000P
C7214
C7255
0.1
C7230
0.1
R7217
1K
R7218
1K
R7221
100
R7216 10K
R7213 2.7K
C7213 0.33
C7215
1000P
C7241
1000P
R7212 820
C7218 0.082
72
71
74
73
80
79
75
77
76
78
51 52 50
65
67
66
70
69
68
59 57 55 56 58 60
62
61
64
63
53 54
23
22
24
21
36
37
33
29
31
32
30
35
34
39
40
38
26
25
28
27
42 41 44 48 47 49 45 46 43
19 2 1 8 7 9 4 5 3 6 17 13 14 10 12 11 16 15 18 20
IC7001
MN6627553PA
SERVO PROCESSOR
C7222 15P C7221 15P
D.GND
C7166
0.01
1K
R7254
C7243 0.1
470P
C7253
C7232
6.3V220
C7233
0.1
+3.3V
6
5
8
9
19
13
10
12
11
17
18
15
14
16
22
21
23
20
7
2
1
4
3
25
24
CN7002
270
R7214
S7201
REST SW
R7253
10
C7227
50V1u
C7228
50V1u
C7225
1000P
C7226
1000P
+1.5V
C7234
0.1
C7235 16V10
X7201
H0H169500013
X7201
R7220
1M
R
7111 10K
C7155
0.1
C7154
0.1
3
2
1
VR1
C7614
6.3V100
C7244 0.015
C7217
0.1
C7601 6.3V33 R7601
4.7
D7650
D7650
MA Z 8056GM L
C7626
0.1
R7650
5.6
W7009 0
W7013 0
W7005 0
Q7601
B1ADCF000001
L ASER POWER DRIVE
Q7601
R7211 82K
C3
0.22
C1
0.47
0.22
C2
C7203
6.3V220
C7204
0.1
C7613 0.1
L 1
TRACKING
C7335
0.1
C7334
10V220
+
M7301*
TRV MOTOR
+
M7302*
SP L MOTOR
+7.5V
L 2
FOCUS
R7335 100
R7331
27K
R7315
3.3K
R7325
330
C7315 0.47
R7323
6.8K
1K R7332
C7142
3300P
51
(RF)
50
(RF)
(VREF)
C7223
50V4.7
C7102
0.47
C7161
0.1
C7216
680P
C7107
0.022
C7338 0.027
C7352
0.018
R7327
1K
R7328
10K
R7329
1K
C7339
0.018
R7349
18K
R7336
10
19 18 17 20 15 16
14 12 9 11 10 13
22 23 30 21 28 27 24 25 26
2 1 6 7 29 8 3 4 5
IC7002
BA5948FPE2
4 CH DRIVE IC
6
5
8
9
10
12
11
7
2
1
4
3
14
13
16
15
6
5
8
9
10
12
11
7
2
1
4
3
14
13
16
15
CN7001
4 5 1 3 2
8 10 11 12 9
6
7
+3.3V
+3.3V
SRDATA(MD & SD)
/RST
+7.5V
P.GND
IPF L AG(SD)
TX
CD OPEN SW
RESET_SW
B L KC L K
MC L K
D.GND
STAT
L OADING
L D_SW
SRDATA1(SD)
BCK(MD & SD)
SRDATA2(SD)
L RCK(MD & SD)
M L D
MDATA
L CH OUT
A.GND
RCH OUT
NC NC FOP PC TRP VREF FG NC TR
VP
NC
L
DCK/SRDA
TA1/EXT3
SUBC/SRDA
TA2/EXT4 BCK/EXT2
SR
VMON1
AVSS2-2
E
D
E
F GND Vcc
A
B
L PD
VREF
F+
T+
T-
F-
GND GUARD
GND
A
GND GUARD
GND
L
PD NC
L
DG
B L
D
E
L D
F
VCC
VREF
L D GND
A
+3.3V
C
B
IREF
P
LL
F0
P
LL
F
L D
RFIN
CENV
NC
AVDD2-2
NC
DS
L
F
RFOUT
ARFIN
ARFFB
AVSS2
ARFDC
ARFOUT
RFENV
PD
F
DVDD1
VCOF OUTR OUT
L
AVDD2 AVREF
L
SPWM
AVDD1
AVSS1
P
LL
F02
SPOUT OSCIN TR
VP2
CTRCRS DVSS1
NRST
GI02
X1
IODVDD2
NSRVMONON
F L AG0 GIOO
GI01
DQSY
X2
DVSS2
SR
VMON0
CSE
L
SRDA
TA/EXT0
TEST
MC L K
M L D
MDATA
STA T S
B L KCK
TX
NTEST2
SBCK / IPF L AG
DVDD2
L
RCK/EXT1
PMCK
D3+
D3-
NC NC NC
VCC
GND
VREF
IN3 IN4
PGND2
D4-
D4+
PVCC2
D2- D2+ NC NC PC2 IN1 IN2 PC1 NC
NC
D1- D1+ NC GND PGND1 PVCC1
IOVDD1 SMCK
W7001
0
W7012
0
W7011
0
W7003
0
W7002
0
W7004
0
W7010
0
W7018
0
W7006
0
W7017
0
W7016
0
W7008
0 W7007
0
W7021
0
W7019
0
W7014
0
W7023
0
W7025
0
W7024
0
W7026
0
W7020
0
36 37
38 39
16 14
19
18
17
13
25
12
7
8
9
4
31
3
2
1
11
10
24
90
S7202
CD OPEN SW
87
100
R7260
A
B
C
D
E
F
G
H
1 2 3 4 5 6 7 8 9 10 11 12 13 14
1 2 3 4 5 6 7 8 9 10 11 12 13 14
A
B
D
E
F
H
G
C
(1)
(25)
CD SERVO CIRCUIT
SCHEMATIC DIAGRAM - 1
TO
MAIN CIRCUIT
(CN2801) IN
SCHEMATIC
DIAGRAM - 5
: CD AUDIO INPUT SIGNA L L INE : +B SIGNA L L INE
SA-AK780 /785 CD SERVO CIRCUIT
OPTICA L PICKUP UNIT
(FOR REFERENCE ON L Y)