Panasonic SC-AK48, Service Manual

Page: 43 / 104

14
32 33 34 35 36 29 28 30 31 27 26
25
24 23 22
47K
7 9 8 6 5 4
21
10 11 12 13
15
16 18
19
47K
10K
10K
1
MOTOR
M
1 3 2
20
Q1107
DTC144TKA146
P.B EQ/REC EQ
(CrO
2
/H.SPEED)
R1
131
68K
C1146
16V10
R1146
10K
C1135
1000P
C1139
50V2.2
C1131
820P
C1129
820P
R1
125
1K
R1
123
10K
R1
121
33K
C1
133
50V4.7
C1
143
50V4.7
R1115
390K
R1117
270K
C1127
0.01
C1123
1800P
C1125
0.047
C1
121
50V1
C
111
9
50V4.7
A B
C
111
7
50V1
C1
147
1500P
R1
141
6.8K
R
1111
2.2K
C1115
0.033
R1109
4.3K
C
111
3
6.3V220
R1
107
39
C
1111
820P
C1
109
16V100
C1
108
16V33
C1
105
1200P
R1105
270
IC1101
M51167AFP-TB
P.B EQ/REC AMP/
ALC/TPS AMP
C1
106
1200P
C
111
2
820P
R1
142
6.8K
R1110
4.3K
R1
108
39
C
111
4
6.3V220
C1
148
1500P
R
111
2
2.2K
C1116
0.033
C1124
1800P
C1
122
50V1
C1
120
50V4.7
C
111
8
50V1
E D C
C1126
0.047
C1136
1000P
R1118
270K
C1128
0.01
R1116
390K
C1130
820P
C1132
820P
C1
144
50V4.7
R1
122
33K
R1
124
10K
R1
126
1K
C1
140
16V10
C1
141
50V0.1
R1
134
470K
C1
142
0.022
R1
133
3.3K
C1
134
50V4.7
Q1108
DTC144TKA146
P.B EQ/REC EQ
(CrO
2
/H.SPEED)
A
B
C
D
E
F
2
R1206
220
Q1203
2SD965RTA
MOTOR DRIVE
W1200
A
B
Q1206,1207
2SB621RTA
SOLENOID DRIVE
Q1206
Q1207
R1221
2.7
R1225
2.7
C1201
16V100
Q1208
Q1209
R1226
1K
R1227
1K
D1202
MA1
1
1TX
D1201
MA1
1
1TX
Q1208,1209
DTC114TKA146
SOLENOID DRIVE
A
GND
TPS
R/P
REC
SW
REC
ALC
C
B
PRE
PRE
PB
PB
A
C
B
A
B
C
AGC
OFF
Vcc
17
R1
132
3.3M
SCHEMATIC DIAGRAM-4
((0V))
((0V))
((0V)):CrO
2
((0V))
4.7V
((9.7V)) ((4.3V)) ((0V)) ((5V)) ((5.2V)) ((4.9V)) ((5.1V)) ((4.8V)) ((4.8V)) ((1.1V)) ((0V))
((9.9V))
((9.4V)) ((0V))
((0V)) ((4.7V)) ((0V)) ((1.1V)) ((4.8V)) ((4.8V)) ((5.1V)) ((5.1V)) ((4.9V)) ((5.2V)) ((5.0V)) ((0V)) ((4.1V)) ((0V)) ((5.1V)) ((0V))
4.8V
((0V))
((0V))
((0V)):CrO
2
14.6V 14.6V
10V
5V
10V
((0V))
((0.8V))
((0V))
((10V))
((10V))
((0V))
((9.5V))
((9.5V))
((9.5V))
((9.5V))
((4.5V))
((4.5V))
((5V))
((5V))
:TAPE PLAYBACK SIGNAL LINE :RECORDING SIGNAL LINE :POSITIVE VOLTAGE LINE
((5.4V))
3.8V 4.9V 4.9V 4.6V 5.0V 4.8V 4.8V 4.4V 4.5V
((0V))
9.1V 4.9V 4.6V
((5.4V))
5.0V 4.8V
((5.1V))
4.8V 4.5V 4.5V
9.3V
8.8V
SA-AK48
43