Panasonic SAHT280 - RECEIVER, Service Manual

Page: 82 / 96

To SURROUND
CIRCUIT(CN702)
on SCHEMATIC
DIAGRAM-5
1
2
3
D744 D742
C741
0.1
D741
C742
2200
D743
F5 1.6A
D741-744
1SR35400V
1
3
S
G
D
10K
4.7K
3 2
1 4
Q751
RVTDTC143ZST
RELAY DRIVE
Rch
Lch
Rch
Lch
1
2
3
1
2
A
B
B
B
D
C
C
A
D
C
H
E
F
G
B
A
FAN MOTOR
CP771
F3 8A
F4 8A
T701
CN751
Z751
JK792
JK791 L701
RL751
T751
D753 D754
D752 D751
C752
0.01
D751-754
1SR35400V
D755
RVD1SS133T
A
F1 8A
C753
330
C757
16V10
C754
0.01
D756
MTZJ6R8BT
A
C755
16V47
CN752
R730
5.6
Q752
2SC3940AQSTA
REGULATOR
Q753
2SK2880CTA
STABILIZER
H
I
J
JK602
JK601
G
E601
C701
0.01
C690
0.01
C751
1000P
W1 W2 W3
M
SPEAKER
1
2
3
W752
+B(4)
GND
+B(4)
W702
12
2
1
3
4
5
6
7
8
9
10
11
12
2
1
3
4
5
6
7
8
9
10
11
W701
AC IN
(120V 60Hz)
AC OUTLET
(SWITCHED)
AC IN/OUT
CIRCUIT
R751
3.3M
R799
22
POWER SUPPLY CIRCUIT
FRONT SPEAKER(B)
FRONT SPEAKERS(A)
SCHEMATIC DIAGRAM-16
MAIN CIRCUIT
POWER TRANSFORMER
CIRCUIT
2
B
A
JK603
CENTER SPEAKER
D
SURROUND SPEAKER Rch
SUB WOOFER SPEAKER
SURROUND SPEAKER Lch
AC
12.3V
4.9V
0V
9.5V
6.6V
6V
9.5V
6.6V
6.6V
AC41.2V
AC76V
AC33.4V
AC4.8V
AC8.4V
:POSITIVE VOLTAGE LINE
:FM/ AM SIGNAL LINE
:CENTER SP SIGNAL LINE
:SURROUND SP SIGNAL LINE
6V
:SUB WOOFER SIGNAL LINE