Panasonic SC-AK48, Service Manual

Page: 45 / 104

9 10 11 12 13 14 15 16
8 7 6 5 4 3 2 1
BP2 IH
REC 2M
1M
2PL
1PL Vcc
GND
D
ATA
CLK
T
APE
HI
SP
DOLBY
BP1
DMT
IC1105
BU2090AF-E2
SYSTEM CONTROL
A B
2
1
3
4
5
6
7
8
9
10
H1100
Lch IN
Rch IN
M.GND
A.GND
+B(5)
MO.GND
D.GND
+B(3)
Lch OUT
Rch OUT
7
8
6
5
4
3
2
1
CN1201
MKDATA
MKCLK
VREF(+)
+B(6)
ADIN6
ADIN7
TPS
D.GND
R1144 10K
R1143 10K
A
B
C
D
E
F
R1216 2.2K
R1215 2.2K
R1234
4.7K
C1
188
100P
R1233
2.2K
C1
187
100P
R1236
4.7K
R1235
4.7K
C1202
0.1
R1230
4.7K
10K
4.7K
10K
4.7K
R1232
1K
R1
106
2.2K
D
C
B
A
Q1218
DTA114EKA146
SWITCHING
(REC:ON)
Q1220
DTA143XKA146
MOTOR DRIVE
D
E
F
C
B
A
1 2 3 4 5 6 7
4.7K
50K
25K
4.7K 4.7K 4.7K
50K 50K 50K 50K
25K 25K
Z1101
SCHEMATIC DIAGRAM-6
To MAIN
(DSC)
CIRCUIT
(CN304) on
SCHEMATIC
DIAGRAM-9
E
To FL
CIRCUIT
(H600) on
SCHEMATIC
DIAGRAM-13
K
TP10 TP9
((0V)) ((4.8V)) ((0V)) ((0V)) ((4.6V)) ((5V))
4.7V
((0.2V))
5.1V
((4.7V)) ((0V)) ((0V))
5V
10V
5V
14.6V
((4.8V))
((5V))
((0V))
4.8V
((5V))
((4.9V))
((0V))
:TAPE PLAYBACK SIGNAL LINE :RECORDING SIGNAL LINE :POSITIVE VOLTAGE LINE
0.2V
((0.5V))
0V 4.5V
0.2V
SA-AK48
45