Panasonic MD0004056C2 Instrukcja serwisowa - Strona 9
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SCHEMATIC DIAGRAM-3
B
DECK1
CS1101
L ch
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
TP12
Q1171
2SD1302STA
SWITCHING
(REC:ON)
24.9V
0.1V
((0.1V))
((0V))
Q1179
2SC2412KT96R
SWITCHING
(BEAT PROOF)
MECHANISM CONTROL CIRCUIT
TP4
TP3
TP11
R1182
1
TP5
IC1102
BA7755A
R/P SELECT
V
GND
CC
1
2
3
4
5
((0V))
((7.8V))
((0V))
4.8V
10.8V
R1188
1K
L1201
6
1
5
2
4
3
D1172
D1171
R1174
MA8047MTX
MA111TX
10K
D1174
0.6V
((0V))
MA8036HTX
R1172
((0V))
330
0.7V
:POSITIVE VOLTAGE LINE
TP2
TP1
C1193
1000P
TP6
Q1101
D
((0V))
2SJ498CDTA
G
HEAD SELECT
0.1V
(REC:ON)
((0V))
((4.4V))
S
C1103
D
((0V))
Q1103
680P
G
2SJ498CDTA
((0V))
HEAD SELECT
((0V))
(PLAY:ON)
S
4.5V
Q1104
C1104
S
((0V))
0.022
2SJ498CDTA
G
HEAD SELECT
((0V))
(PLAY:ON)
4.5V
((0V))
D
Q1102
R1195
S
((0V))
100K
2SJ498CDTA
HEAD SELECT
G
((4.4V))
(REC:ON)
((0V))
0.1V
D
C1102
1000P
C1194
R1104
1000P
15K
14.6V
C1177
Q1175,1176
1000P
2SC2002KTA
BIAS OSC
14.3V
R1179
0.6V
2.7K
((14.7V))
((0V))
Q1175
R1178
0V
1.2
((0.1V))
0.6V
R1180
0.1V
2.7K
((0V))
((0V))
Q1176
C1178
14.3V
((14.7V))
1000P
D1175
MA111TX
0.9V
0.6V
((0V))
((0V))
Q1174
2SC2412KT96R
((0V))
BIAS OSC CONT.
((0V))
4.7K
((4.8V)):CrO
2
Q1173
DTC144TKA146
BIAS OSC CONT.(CrO
)
2
:TAPE PLAYBACK SIGNAL LINE
:RECORDING SIGNAL LINE
R1181
3.3K
TP171
TP172
TP170