Sharp GX20 Service Manual - Page 133
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OGSTMECeQXZaHrGvr/2IkAi0QXceet/P2YM0TOaE/nCuRaallc6. OTHERS CONFIDENTIAL [1] Function table of IC IC101 VHINJM2149R-1+ (NJM2149R): SPEAKER AMP. Pin No. 1 2 3 4 5 6 7 8* Terminal name CD VREF +VIN -VIN Vout1 V+ GND VOUT2 Input/Output Input Input Input Input Output Input - - Chip disable control terminal Reference voltage terminal Analog input terminal Analog input terminal Analog output terminal Power supply +3V Ground Not used Description of terminal In this unit, the terminal with asterisk mark (*) is (open) terminal which is not connected to the outside. V+ 6 VIN 4 +VIN 3 BIAS 1 CD - 5 VOUT1 + 20 k +VREF 2 50 k 145 k 50 k - 20 k + 7 GND 8 VOUT2 GX20 6 - 1
GX20
6 β 1
CONFIDENTIAL
OZ/IQ/YO/Calc
GX20
Service Manual
TQGX20
Market
E
CHAPTER 6.
OTHERS
[1] Function table of IC
IC101 VHINJM2149R-1+ (NJM2149R): SPEAKER AMP.
In this unit, the terminal with asterisk mark (*) is (open) terminal which is not connected to the outside.
Pin No.
Terminal name
Input/Output
Description of terminal
1
CD
Input
Chip disable control terminal
2
VREF
Input
Reference voltage terminal
3
+VIN
Input
Analog input terminal
4
βVIN
Input
Analog input terminal
5
Vout1
Output
Analog output terminal
6
V+
Input
Power supply +3V
7
GND
β
Ground
8*
VOUT2
β
Not used
+
-
6
V+
GND
5
7
+
-
BIAS
4
3
2
50 k
50 k
20 k
20 k
145 k
8
1
VOUT2
VOUT1
CD
+VREF
+VIN
VIN