Sharp CD-ES770, Service Manual

Page: 4 / 14

CD-ES770
– 4 –
A
B
C
D
E
F
G
H
1
2 3 4 5 6
0.7V
0V
0V
0V
0.7V
0V
0V
0V
0V
0V
0V
9.3V
8.6V
9.3V
0V 3.4V
3.4V
0V
0V
0V
0.7V
0.7V
0V
0V
0V
0.7V
0.7V
1/50
1/50
180P(CH)
47/25
1K
560P
1.5K
22/50
100
0.0033
KTC3875 GR
2.2K
390
KTC3875
GR
2.2K
4.7K
8.2K
4.7K
1K
1/50
1/50
1/50
1/50
4.7/50
1/50
0.0027
0.0
220/16
0.022
1/50
10K
18K
1K
3.
0.0
220/10
220/10
22/25
KTC3200 GR
KTC3200 GR
KTC3200 GR
KTC3200 GR
KTA1504 GR
220K
22/50
22K
1/50 22K
0.0022
1.5K
0.0022
1.5K
220P 220P
220P
9
10
11
12 13
14
15
16
17
18
19
20
21
22
23
24
8
7
6
5
4
3
2
1
68K
47/50
150
100/16
10K
0.022
47/25
5.6K
3.3/50
5.6K
KRC104 S
1K
0.0033
0.022
0.1
0.12
(ML)
680P
3.9K
1/5
0.12(ML)
0.1
1/50
4.7/50
1/50
56
10K
KTC3875
GR
330P
330P
1K
4.7K
10K
KTC3875
GR
330P
4.7K
0.0015
6.8K
100K
3.9K
47/25
560P
47/25
6.8K
0.039
15K
KRC104 S
10K
KTC3875 GR
10K
KTC3875 GR
10K
100K
3.9K
3.3K
2.2K
3.3K
2.2K
330P
15K
1.5K
0.0015
2.2K
2.2K
KTC3875
GR
KTC3875
GR
390
1/50
47K
4.7K
1K
270P
560P
47K
180P
22/50
270P
0.022
100
4.7K
0.0022
18K
0.0022
18K
4.7K
47/25
56
47/25
560P
0.039
5 4 3 2 1 6 7 8 9 10 11 12
13 14 15 16 17 18 19 20 21 22 23 24
330
330
REC_R
T2_R2
A_GND
L
L
R
R
T1_R
T1_L
A_GND
M_GND
ERASE
T2_R1
T2_L1
T2_L2
ERASE HEAD
TAPE2
TAPE1
PLAYBACK HEAD
R-CH
L-CH
R-CH
L-CH
1
2
3
1
2
3
1
5
6
7
4
3
2
6
1
2
3
4
5
7
LD+7V
A_5V
D+5V
D+5V
D_GND
L-CH
A_GND
R-CH
AGC
CD_D_GND
CD_A_GND
A+5V
+8V
CD_GND
L-CH
A_GND
R-CH
8
9
7
6
5
4
3
1 1
8
7
6
5
4
3
2
D_GND
P6-14
1-F
TO
POWER
SECTION
- +
- +
- +
-+
- +
- +
-
+
-
+
CCB
INTERFACE
AUX
DECK
TUNER
CD
112K
56K
112K
56K
Hich=CHROME
–
–
+ +
Hich=T1
+
–
+
–
Nor/CrO2
RIPPLE
ALC ALC
Vcc
LSEL0
R1
R2
R3
R4
RSEL0
RIN
RTRE
RBASS
ROUT
VREF
VDD
CLK
L1
L2
L3
L4
LIN
LTRE
LBASS
LOUT
VSS
CE
DI
RECORD/
PLAYBACK HEAD
10
11
12
7
14
6
15
16
17
26
MAIN PWB-A1 (1/3)
CNP2
P6-9
12-E
TO
CD
SERVO
PWB
+B
+B
+B
+B
+B
+B
SWITCHING
SWITCHING
SWITCHING
MUTING MUTING
SWITCHING
SWITCHING
SWITCHING
SWITCHING
SWITCHING
SWITCHING
+B
CNS601
BI601
CNP101
CNP102
Q103
Q101
R103
R105
C103
Q105
C105
R109
R107
R111
R101
Q106
C106
R110
R108
R102
R112
Q112
R146
R148
R147
Q114
Q113
C141
R149
C639
R621 C625
R609
R612
R614
R985
R615
R616
R617
Q604
Q603
R619
R618
Q601
R611
R988
2.2K
R987
2.2K
Q602
Q909
KTC3875
GR
Q908
KTC3875
GR
R610
R613
R986
8.2K
R601
R602
C652 C651
C619
C617
C615
C613
C611
C631
0.01
C609
C657
R605
R657
C605
C607
R607
C621
C623
C6 C601 C653
C603
C608
C61
R6
C606
C6
C624
C620
C622
C614
C616
C618
C626
R608
R136
R137
Q107
R139
Q108
R138
R150
R116
C108
C110
R114
C112
C116
C118
R124
C114
R118
R120
C120
R122
R130
R132
C130
C150
C132
R134
C124
C128
R126
C135
C134
C133
C131
C143
R129
C129
C127
R135
R131
C123
C125
R133
R127
C121
R123
C119
R121
R117 R119
C111
R115
C117
C115
C113
C109 C107
R113
C126
R128
IC101
AN7345K
IC101
AN7345K
PLAYBACK
AND
RECORD/
PLAYBACK
C640
R620
C104
C102
Q104
Q102
R106
R104
C101
IC601
LC75341
AUDIO PROCESSOR
FM SIGNAL
PLAYBACK SIGNAL
RECORD SIGNAL
CD SIGNAL
VIDEO SIGNAL
AUDIO SIGNAL
Figure 4 SCHEMATIC DIAGRAM (2/7)
• NOTES ON SCHEMATIC DIAGRAM can be found on page 5-1 (CD-ES700).
: Addition/Changed