sharp SV287XH Repair Tips
Search: SV287XH sharp
Results 2
Results 2
| Make | Model Ch. | Symptom | Problem Solution | Solution | By: |
|---|---|---|---|---|---|
| Sharp | SV287XH | St/by only at sw on with burning smell | R518 2R2 smokes due to fop chip IC501 LA7831 faulty - caused by C521 & 522 100ยต 35v o/c | ||
| Sharp | SV287XH | Blank raster/no sound - OSD present (RF & Scart) | Switching [video and audio] is performed by IC401 [M51321P] a three gang three way device. pin 15 of the IC works on a tristate level. With the IC supply being 12V: 0 - 2.5V Input from BNC; 5 - 7V Input from scart ;9 - 12V Input from tuner. Diode D419 [DX00458M] which links to the wiper of the AGC preset was leaky, limiting the voltage on pin 15 to 7V and thus preventing tuner mode selection. Replace D419 with an IN4148 |