Pin Details of IC TDA 2540 , TDA 2541
( For NPN Tuner )
( For NPN Tuner )
Substitute : TDA3540 , TDA8340 ,A241D , TDA2541 , TDA8341
Functions :
| Pin No. | Functions | Voltage |
| 1. | Balance IF input | 4.7 |
| 2. | Decoupling Capacitor for thr Dc feedback loop of the IF amplifier | 4.7 |
| 3. | Adjusting pin for starting point of tuner AGC | 1.3 |
| 4. | Tuner AGC output | 3.3 |
| 5. | AFT output | 5.5 |
| 6. | AFT on/off switch | 11 |
| 7. | AFT circuity to obtain in n/2 phase shift of the reference carrier | 3.8 |
| 8. | Circuity for passive regeneration of the IF picture carrier | 7.9 |
| 9. | Circuity for passive regeneration of the IF picture carrier | 7.9 |
| 10. | AFT circuity to obtain n/2 phase shift of the reference carrier | 3 |
| 11. | Positive (+Ve)supply voltage (10.2 to 13.2 V;40 to 70mA ) | 12 |
| 12. | Video signal output | 4 |
| 13. | Ground (-Ve supply voltage ) | 0 |
| 14. | IF AGC , VCR switch | 4.7 |
| 15. | Decoupling Capacitor for the DC feedback loop of the IF amplifier | 2 |
| 16. | Balance IF input | 2 |