Using the schematic, the following troubleshooting steps are identified: Verify Vscap V sub s (approx. 200V) and Vscancap V sub s c a n end-sub are reaching the Y-Sus board.

Provide actionable information for repairing common Y-Sus failures (e.g., no picture, vertical lines, clicking sounds). 3. Functional Blocks of Y-Sus Schematic

If the Y-Sus shuts down immediately, remove the Y-Buffer boards to check for shorts on the buffer board itself. 6. Conclusion

Look for failed electrolytics or small ceramic capacitors in the ERC circuit that may cause power-on issues.

The schematic often reveals that failure clusters around the switching MOSFETs (e.g., ) due to overheating.

The scan driver connector receives timing signals from the main board/logic board, while the top of the board receives high-voltage sustain signals.

Monitors voltage levels and shuts down if a short is detected. 4. Findings and Analysis