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This chip is found to be given various markings but we'll refer to it as the JRC
NJM2035 
NJM2035 Pin-Out
|
Pin |
Function |
Notes |
| 1 |
INPUT left |
Left audio input |
| 2 |
- |
not connected |
| 3 |
AC BYPASS |
AC bypass for analogue input amps |
| 4 |
GND |
Ground |
| 5 |
AC BYPASS |
AC bypass for 38kHz oscillator |
| 6 |
To crystal |
To 38kHz crystal |
| 7 |
Xtal |
To 38kHz crystal
via capacitor |
| 8 |
Pilot output |
19kHz pilot out |
| 9 |
MPX out |
Multiplex output |
| 10 |
V+ |
V+ (2.15v when in transmit mode) |
| 11 |
TRIM |
Left / right balance |
| 12 |
TRIM |
Left / right balance |
| 13 |
- |
not connected |
| 14 |
INPUT right |
Right audio input |
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