Panasonic SA-AK770PL Service Manual page 105

18.9. (M) D-Amp Circuit
1 2 3
SCHEMATIC DIAGRAM - 15
D-AMP CIRCUIT
A
: +B SIGNAL LINE
B FHOP
FAN_DC
FAN_GND
IC5500
C0JBAB000902 C5562
6.3V1000
INVERTER GATE
(CLOCK GENERATOR)
C5550
0.01
SW+5V
1
1A VCC 14
C5556
C 0.01
D5501 - D5502
6A
MA2J11100L 2 1Y 13
C5557
X5501 100P
3
H2A7003A0011 2A 6Y 12
C5551
390P
5A
4 2Y 11
C5553
100P
5
3A 5Y 10
X5500
H2A6023A0011
6 3Y 4A 9
C5552 R5505
390P
100
7 8
D GND 4Y
OSC
W5071 0
SW+5V
1 O1 VCC 14
2 O1 O2 13
E
CP1 O2 12
3
4 CD1 CP2 11
10
5 D1 CD2
6 SD1 9
D2
8
7
GND SD2
F
IC5501
C0JBAF000716
D-TYPE FLIP-FLOP
G
K5251 0
K5252
0
H
1 2 3
4 5 6
: -B SIGNAL LINE : MAIN SIGNAL LINE
VDDP
VSSP
Q5603
MODE1
B1ADCE000012
R5611
SWITCH
1.2K
SW+5V MODE2
Q5604
R5602
B1ABCF000176
10K
MOD_DA
SWITCH
Q5101
Q5601
B1ABCF000176
B1ABCF000176
MUTE_F
DC DETECT
SWITCH
R5609
10K
4 5 6
7 8 9 10
R5018 68K FR_-
R5113 68K FL_-
FR_+
R5020 120K
68K FL_+
R5019
Q5102
B1ABCF000176
DC DETECT
R5318 120K SW_+
R5328 68K SW_-
AGND
FAN_GND
W5780
0
R5671
0
7 8 9 10
105
SA-AK770PL / SA-AK770GCP
11 12 13 14
JK5001
SW+
1 SUBWOOFER +
SW-
2 SUBWOOFER -
FR+
3 FRONT R+
TO SPEAKERS
FR-
4
FRONT R-
FL+
5
FRONT L+
FL-
6 FRONT L-
4
1
5
3 2 1
ZJ5410
TO D-AMP
SECTION (2/2)
6
1/2 2/2
SA-AK770PL/GCP D-AMP CIRCUIT
11 12 13 14