Panasonic SA-AK78 Service Manual page 20

SA-AK78
[ DECK 1 ]
PLAYBACK
HEAD
(L ch)
[ DECK 2 ]
R/P
HEAD
(L ch)
[ DECK 2 ]
ERASE
HEAD
TP11 TP12
[ DECK1 ]
0N2180RLC1
IC951
VREF+
INTERFACE
Z1101 INTERFACE
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TP3
Q1103 (Q1104)
(TP4)
HEAD SELECT
(PLAY:ON)
Q1101(Q1102)
HEAD SELECT
(PLAY:ON)
TP5 Q1218
SWITCHING
(REC:ON)
+B6
BA7755A
IC1102
24
R/P SELECT
(13)
4
14
3
2
1 5 25(12)
Q1107 (Q1108)
REC EQ
+B2
(CrO2/H.SPEED)
+B3
L1201
BIAS OSC
CONTROL
Q1173~1176
SWITCHING
Q1171
(REC:ON)
Q1179
SWITCHING
(B.P.)
[ DECK2 ]
0N2180RLC1
IC971
VREF+
INTERFACE
Q1118,1119 Q1120,1121
Q1203,1220
VREF+
+B5
M51167AFP-TB
IC1101 (1/2)
P.B. EQ / TPS AMP
2 19
36(1)
33(4)
32(5)
31(6)
TPS
16
21
17
CR NETWORK
M51167AFP-TB
IC1101 (1/2)
REC AMP / ALC
27(10) 26(11)
28(9)
29(8)
SW ALC
AGC OFF
23 22 15 3
[ DECK1 ]
S953
(ATS/CrO2)
[ DECK2 ]
S973
(ATS/CrO2)
+B6
1
7 16 4
BU2090AF-E2
IC1105
SYSTEM CONTROL
14
13
Q1206,1208
MOTOR
SOLENOID
D971 D951
DRIVE
DRIVE
[DECK2]
M
+B5 +B6
SOLENOID
SOLENOID
MOTOR
20
To Main section
CD P.B.signal
Q1153
(Q1154)
BUFFER
AMP
34
TP9(
+B3
+B3
30(7)
18
Q1115
(Q1116)
MUTING
+B3
Q1151
(Q1152)
SWITCHING
(PLAY:ON)
Z971 INTERFACE
10 11 8
2
DATA
15
3
Q1207,1209
SOLENOID
A
DRIVE
[DECK1]
+B5 +B6
TP10 )