Vestel 17ips12 Schematic

Follow the gate drive signal from the standby PWM IC (IC901) to the standby MOSFET. Use an oscilloscope to check for a square wave. No wave → Check VCC pin of IC901 via startup resistors.

Locate the AC input (JP901/JP902). Confirm AC voltage arrives at the bridge rectifier (BD901). vestel 17ips12 schematic

| Symptom | Schematic Area | Suspect Components | | :--- | :--- | :--- | | Dead, no LED | Primary AC input | F901, BD901, VZ901 | | Standby LED ON, but TV won't start | Startup resistors | R914, R915, R917 (open circuit) | | TV turns off after 2 seconds | Inverter protection | OZ964 pin 3 (OVP), C701, C702 | | Buzzing sound from backlight | Inverter timing | Capacitors around IC701 pin 4 (CT) | | +12V rail is low/fluctuating | Feedback loop | IC903 (optocoupler), IC904 (TL431) | | Blown fuse repeatedly | Primary MOSFET | Main switching FET (Q901) shorted D-S | Let’s assume you have the schematic open. Here is the logical sequence a professional follows: Follow the gate drive signal from the standby

If you successfully repair your board, consider uploading a clear photo or your own marked-up schematic to help the next technician. The repair community runs on shared knowledge. Need specific component values for the 17IPS12? Leave a comment below (or consult the official PDF schematic for your exact board revision). Locate the AC input (JP901/JP902)