PIN Details of IC CA 920
Substitude : TBA 920 , 1034
Functions :
- Horizontal Oscillator
- Sync separator
- AFC (Automatic Frequency Control)
| Pin No. | Function | Voltage |
| 1. | POSITIVE (+Ve) supply voltage | 12 |
| 2. | 15625Hz.frequency output to horizontal driver section | 4.2 |
| 3. | Pulse shaper and phase shifter | 2.4 |
| 4. | Phase discriminator | 2.4 |
| 5. | Flyback (blanking)pulse input (15625Hz.)from EHT | -0.2 |
| 6. | Horizontal sync input (phase discriminator)(15625Hz.) | 0 |
| 7. | Separated sync output | 1 to 7 |
| 8. | Composite video signal input | 0.2 |
| 9. | Noise gating | 0 |
| 10. | Coincidence detector | 2.6 |
| 11. | Time constant switching | 3.2 |
| 12. | Control voltage limiter | -1.4 |
| 13. | Horizontal oscillator (reference voltage)(15625Hz.) | 7.5 |
| 14. | Horizontal oscillator (15625Hz.generation) | 7 |
| 15. | Horizontal oscillator (15625Hz)control (H-Hold) | 3 |
| 16. | Ground (-Ve terminal) | 0 |
Note: 1. if top shifting occurs when VCR is connected . 2.Please use styroflex capasitor only (10 Kpf)at Pin No.14.
