Sharp DV-L70U Service Manual page 34

DV-L70U
9-12. IC702 BA5933FP
Pin No. Terminal name
1 STBY
2 OUT+
3 OUT-
4 GND
5 VCC
6 MUTE
7 GND
8 REG_OUT
9 REG_B
10 BIAS
11 IN1'
12 IN1
* The negative/positive pole of the output terminal is the polarity against the input.
• Block Diagram
Operation function
Stand-by mode selector switch
CH1 positive output terminal
CH1 negative output terminal
GND
VCC
Mute terminal
Substrate GND
Constant voltage output
(collector of external Tr)
Connected to the base of external Tr
Bias input terminal
CH1 gain adjustment input terminal
CH1 gain fixed input terminal
25 24 23 22 21
x2 x2 x2 x2
LEVEL SHIFT
LEVEL SHIFT
LEVEL SHIFT
STBY
x2
x2
1 2 3 4 5
Pin No. Terminal name
13 OP_OUT
14 OP_IN(-)
15 OP_IN(+)
16 IN2'
17 IN2
18 IN3'
19 IN3
20 VCC
21 GND
22 OUT3-
23 OUT3+
24 OUT2-
25 OUT2+
20 19 18
8.3KΩ
T.S.D.
8.3KΩ
REGULATOR
+ -
MUTE
6 7 8 9
9-15
Operation function
Operation amplifier output
Operation amplifier negative input
Operation amplifier positive input
CH2 gain adjustment input terminal
CH2 gain fixed input terminal
CH3 gain adjustment input terminal
CH3 gain fixed input terminal
VCC
GND
CH3 negative output terminal
CH3 positive output terminal
CH2 negative output terminal
CH2 positive output terminal
17 16 15 14
+ -
OP-AMP
T.S.D ; Thermal shutdown
+ -
Unit of resistance is [Ω].
10 11 12 13