Sharp CD-PC1881V Service Manual page 20

CD-PC1881V
TO MAIN SECTION
20 11 13 18
A
B
C
D
R174
150
(1/2W)
E
C153
100/16
3 3.4V
1
2
0V
F R115
4.7K
R114
10K
Q109
KTA1266 GR
G
Q103-Q111:SWITCHING
H
PLAYBACK HEAD
• NOTES ON SCHEMATIC DIAGRAM can be found on page 38.
1
All manuals and user guides at all-guides.com
P18 3-A
19 21 12 16 15
14 17
MECHANISM
KRC104 M
+B +B
R158
220
0V
0V C146
220/16
0.7V
C147
R153
0.022
10K
C145
22/25
R146
10K
C142
1/50
R154
C140
10K
0.0033
R142
C136
C134
0.7V
0.068
22/25
56
R140
0V
560
C132
0V
0.001
R136
R138
6.8K
2.7K
R134
68K
R132
18K
C122
R126
1/50
5.6K
C120
R124
560P
3.9K
R122
C118
100K
0.033
C114
330P
R120
C116
56
47/25
C112
330P
R118
1K
3.4V
3
1
0V
0V 2
R108
47K
8.6V
0V
Q104
2SC2389 SE
C102
C106
C101
0.001
0.001 180P
1 2 3
CNP101
CNP102
CNS102
CNS101
TAPE1
L-CH
R-CH
2 3
Figure 20 SCHEMATIC DIAGRAM (3/12)
C652 MAIN PWB-A1(2/2)
0.01
BOTTOM
CHASSIS CHASSIS
Q126
0V
1
2
3
0V 11.6V
R162
0V
47K
R167
100K
R164
R160
4.7K
150
(1/2W)
11.6V R166
47K
0V
11.7V
SWITCHING
Q124
KTA1266 GR
13 Vcc GND 12
RIPPLE
14 11
ALC
R145
Nor/CrO2
10K
NC
15 10
ALC C141
1/50
16 9
C139
0.0033
R141
C133
56
22/25
R139
8
17
560
C131
0.001
R135
18 7
2.7K
R137
6.8K
C128
3.3/50
19 6
C127
0.022
NC 20 5
NC
C121
R125
1/50
5.6K
21 4
R123
3.9K
C115
C113
R121
47/25
330P
100K
22
3
23
2
C111
330P
IC101
24 1
R117
AN7345K
1K
PLAYBACK AND
RECORD/
PLAYBACK AMP.
C108 C107 0.001
Q108
0.001
KTC3199 GR
Q107
KTC3199 GR
0V 0V
0V 0V
0V
R109
4.7K 0V
R110
4.7K
Q105
2SC2389 SE
R106 R105
3.3K 3.3K
0.7V
0V
0V 0V
0V
Q103
2SC2389 SE
C105
180P
PLAYBACK SIGNAL
RECORD SIGNAL
5 7
1 2 3 4 6
1 2 3 4 5 6 7
TAPE2
RECORD/
ERASE
R-CH L-CH
PLAYBACK HEAD
HEAD
4
– 20 –
C152
47/25
L104
0V 330µH
R168
12
0V Q128
C151
KTC3203 Y
0.027
(ML)
C150
0.0039(ML)
C135
0.068
C137
0.001
R131
18K
R119
56
R111
10K
R107
47K
0V
5 6