Sony KP-48V80 Service Manual page 62

1
A
B
C
D
E
F
G
H
A (1/3) BOARD : IC406 TDA7265
+VS
3
MUTE / ST-BY 5
L + IN 7
4
L OUT
I
8 L -IN
GND 9
10 R -IN
2 R OUT
R + IN 11
1 6
R-VS L-VS
J
• A (1/3) BOARD WAVEFORMS
K
1 2 3 4
16MHz 33.8688MHz
4.1Vp-p (H) 4.1Vp-p (H) 3.3Vp-p (V) 3.1Vp-p (V)
5 6 7 8
L
2.3Vp-p (H) 2.2Vp-p (H) 2.6Vp-p (H) 1.2Vp-p (V)
9 10 11 12
M
503kHz 3.58MHz
5.6Vp-p (H) 140mVp-p (V) 1.3Vp-p (H) 0.2Vp-p (V)
13 14 15 16
N
1.4Vp-p (H) 861mVp-p (H) 2.3Vp-p (H) 2.3Vp-p (H)
17
O
2.6Vp-p (H)
Schematic diagram
A (1/3) S
– 75 –
2 3 4 5 6 7
4 .7 µ H
4 .7µ H
4 . 7 µH
- 3
ST BY 5 V
1 0 µ H
- 3
board /
– 76 –
8 9 10 11 12 13
I O
G VC
4 .7 µ H
1 0 µ H 5 V
9 V
1 0 0µ H
4 7 µ H
1 0 µ H
- 3
EM I
- 3 - 3
- 3
- 3
- 3
-3 -3 -3
-3
- 3 - 3
- 3 - 3
- 3
– 77 –
14 15 16 17 18 19
Y M
B L K
- 3
- 3
-3
-3
- 3 - 3
- 3 - 3
-3
- 3
- 3
- 3 - 3
- 3
- 3
- 3 - 3 -3 - 3
- 3
- 3
- 3
- 3
- 3
- 3 -3
- 3
A ( 1/ 3)
20 21 22 23 24
4 .7 µ H
S
10 0µ H
T O
( 2/ 3)
S
S
WH T
- 3
S
- 3
- 3
- 3
– 78 –