Schematic Diagram-4 - Panasonic SA-AK78 Service Manual

SA-AK78

SCHEMATIC DIAGRAM-4

C
D
B
IC1101
M51167AFP-TB
P.B.EQ/ REC AMP/
ALC/ TPS AMP
A
E
F
:NEGATIVE VOLTAGE LINE
:POSITIVE VOLTAGE LINE
C1133
50V4.7
C1115
0.033
((0V)) ((9.1V)) ((9.7V)) ((0V)) ((1V)) ((4.6V)) ((4.7V)) ((4.9V))
36 35 34 33 32 31
B
Vcc
C
PB
A
A PB
C
B
AGC
OFF
1 2 3 4 5 6
((0V)) ((4.6V)) ((0V)) ((1V)) ((4.6V)) ((4.7V)) ((4.9V)) ((4.9V))
C1116
0.033
C1134
50V4.7
:TAPE PLAYBACK SIGNAL LINE
: RECORDING SIGNAL LINE
14.8V
C A
C1129
820P
R1115
390K
R1109 C1127
4.3K 0.01
C1125
0.047
((4.7V)) ((5V)) ((4.8V)) ((0V)) ((4.7V)) ((0V))
30 29 28 27 26 25
REC
PRE
ALC
PRE
7 8 9 10 11 12
((4.7V)) ((5V)) ((4.8V)) ((0V))
C1126
0.047
R1110 C1120 C1128
4.3K 50V4.7 0.01
R1116
C1130
820P
D B
30
Q1107
DTC144TKA146
P.B EQ/ REC EQ
(CrO / H.SPEED)
2
R1121
33K
((4.8V)):CrO
2
((0V))
((0V))
C1131 C1135 C1146
820P 1000P 16V10
R1146
10K
R1117
270K
C1139
50V2.2
4.3V
((9.6V))
24 23 22 21 20 19
GND
B A
C
SW
TPS
REC
R/ P
13 14 15 16 17 18
((0V)) ((0V)) ((4.2V)) ((5V))
4.9V
R1118
270K
390K
C1132
820P
Q1108
DTC144TKA146
P.B EQ/ REC EQ
(CrO / H.SPEED)
2
R1122
33K
((4.8V)):CrO
((0V))
((0V))
A
B
C
D
E
2