Sanyo DP26648 Service Manual - Page 30

Ic Block Diagrams

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IC001, Audio AMP IC BLOCK DIAGRAMS Standby Vcc 6 9 IN 1 3 MUTE 7 PRE\ GND 4 Input Amplifier Ri= 30k Ω Output Amplifier 14 + OUT1 13 - OUT1 Vcc/ground shorting protection circuit Load shorting protection circuit Thermal protection circuit 11 PWR GND IN2 5 Ri= 30k Ω Input Amplifier Output Amplifier 10 + OUT 2 12 - OUT 2 IC1251 Video and Audio Select 2 Ripple Filter VDD 16 A 10 B9 INH 6 8 VSS X-COMMON 13 I/O c O/I 0X 12 I/O c O/I 1X 14 I/O c O/I 2X 15 I/O c O/I 3X 11 I/O c O/I 0Y 1 I/O c O/I 1Y 5 I/O c O/I 2Y 2 I/O c O/I 3Y 4 7 VEE Y-COMMON 3 Control & Input LOGIC LEVEL CONVERTER - 30 -

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IC BLOCK DIAGRAMS
IC001, Audio AMP
LOGIC LEVEL
Control & Input
CONVERTER
I/O
c
O/I
I/O
c
O/I
I/O
c
O/I
I/O
c
O/I
I/O
c
O/I
I/O
c
O/I
I/O
c
O/I
I/O
c
O/I
X-COMMON
13
0X
12
1X
14
2X
15
3X
11
0Y
1
1Y
5
2Y
2
3Y
4
Y-COMMON
3
V
EE
V
SS
V
DD
INH
B
A
7
8
16
10
9
6
IC1251 Video and Audio Select
6
9
3
Ri=
30k Ω
Output Amplifier
Input Amplifier
7
4
5
2
12
10
11
13
14
Ri=
30k Ω
Output Amplifier
Input Amplifier
Vcc/ground shorting protection circuit
Load shorting protection circuit
Thermal protection circuit
Standby
Vcc
+ OUT1
IN 1
MUTE
PRE\
GND
IN2
- OUT1
PWR
GND
+ OUT 2
- OUT 2
Ripple
Filter