Pin Details of IC TA7680AP
Substitute : KA2914
Functions :
- VIF
- SIF
- Video Pre-amplifier
- Video detector
- IF AGC
- RF AGC
Pin No. | FUNCTION | Voltage |
1. | Volume control | 0-6.7 |
2. | Noise filter biasing | 2.7 |
3. | Audio output | 7 |
4. | Ground (-Ve supply voltage) | 0 |
5. | AGC detector | 7.3 |
6. | Decoupling capacitor for DC feedback loop of IF amplifier | 4.9 |
7. | Balanced PIF input | 4.8 |
8. | Balanced PIF input | 4.8 |
9. | Decoupling capacitor for DC feedback loop of IF amplifier | 4.9 |
10. | RF AGC | 6.4 |
11. | RF AGC output | 3.9 |
12. | PIF ground | 0 |
13. | AFT output -1 | 7.2 |
14. | AFT output -2 | 5.8 |
15. | Video signal output | 3.6 |
16. | AFT tank | 4.2 |
17. | Video tank IF dtector circuit | 7.8 |
18. | Video tank IF dtector circuit | 7.8 |
19. | AFT tank | 4.2 |
20. | Positive (+Ve supply voltage) | 11.7 |
21. | Sound IF input (5.5MHz.) | 4.6 |
22. | Sound IF detector (5.5MHz.) | 4.6 |
23. | De-emphasis(audio output | 5.3 |
24. | Soud IF detector (tank circuit) | 4.5 |