Panasonic SA-AK58 Service Manual page 122

SCHEMATIC DIAGRAM-5
C
MECHANISM CONTROL CIRCUIT
DECK1
L ch CS1101
1
PLAYBACK
2
HEAD
3
R ch
4
5
DECK2
L ch
CS1102
1
R/P HEAD
2
R ch
3
4
ERASE
HEAD
5
ERASE CURRENT
CHECK POINT
Q1179
2SC2412KT96R
SWITCHING
(BEAT PROOF)
TP6
R1102
100K
TP3
TP2
TP1
TP4
TP5
R1195
100K
TP11
IC1102
BA7755A
R/P SELECT
Vcc
1 2
((8.3V)) ((0V))
R1188
11.1V
1K
TP12
L1202
47 H
L1201
6
5
4
D1171
R1173
MA111TX
10K
D1174
0.7V
((0V))
MA8036HTX
((0V))
Q1171
2SD1302STA
26.4V
SWITCHING
((0V))
(REC:ON)
((0V))
:POSITIVE VOLTAGE LINE
14.5V
R1103
15K
C1193 C1101
1000P 1000P
D
0V Q1101
((0V))
((4.2V))
2SJ498CDTA
G
HEAD SELECT
((0V))
(REC:ON)
S
S
0V Q1103
((0V))
((4.4V))
2SJ498CDTA
G
HEAD SELECT
((0V))
(PLAY:ON)
D
D
0V ((0V)) Q1104
((4.4V))
2SJ498CDTA
G
HEAD SELECT
((0V))
(PLAY:ON)
S
S
0V Q1102
((0V))
((4.2V))
2SJ498CDTA
G
HEAD SELECT
((0V))
(REC:ON)
D
C1194 C1102
1000P 1000P
R1104
15K
GND
3 4 5
((0V))
4.9V
((14.8V))
Q1176
((0V))
R1178 1.2
((0V))
Q1175
1
2 ((14.8V))
3
Q1175,1176
2SC2002KTA
BIAS OSC
D1172
R1174
MA8047MTX
10K
0.6V
R1172
((0V))
330
Q1173
DTC144TKA146
BIAS OSC CONT.(CrO
:TAPE PLAYBACK SIGNAL LINE
:TAPE RECORDING SIGNAL LINE
A
B
C
D
E
F
C1178
1000P
R1180
0.6V
2.7K
((0V))
R1179
0.6V
2.7K
((0V))
C1177
1000P
D1175 TP171
MA111TX
0.7V
0.6V
((0V))
((0V))
Q1174
2SC2412KT96R
BIAS OSC CONT.
TP170
(CrO )
2
((0V))
((4.8V)):CrO
2
TP172
)
2