Functions : Audio pre-amplifier and Audio output
| Pin No. | Function | Voltage |
| 1. | Audio frequency output | 6.5 |
| 2. | Positive(+Ve supply voltage) | 12.8 |
| 3. | Bootstrap | 12.6 |
| 4. | Not connected | - |
| 5. | Not connected | - |
| 6. | (Feed back ) invert input | 2.6 |
| 7. | SVR | 2.5 |
| 8. | Non invert input (Audio frequency input)5.5MHz | 2.6 |
| 9. | Ground(-Ve supply voltage) | 0 |
| 10. | Ground(-Ve supply voltage) | 0 |
| 11. | Ground(-Ve supply voltage) | 0 |
| 12. | Ground(-Ve supply voltage) | 0 |
| 13. | Ground(-Ve supply voltage) | 0 |
| 14. | Ground(-Ve supply voltage) | 0 |
| 15. | Ground(-Ve supply voltage) | 0 |
| 16. | Ground(-Ve supply voltage) | 0 |
