The PA module might need replacement if it is overheating or not producing power. Issue: No Sound (Receiver Issue) Speaker Check: Test the speaker for continuity.
A service manual doesn’t guess. It provides:
: Look for a detailed table of contents or index. This will help you navigate directly to sections relevant to your needs, such as troubleshooting, part replacement procedures, or technical specifications.
Service & maintenance tasks covered in a manual
Check continuity across the power switch contacts on the PCB when turned to the "on" position. Replace the potentiometer if it reads open loop.
Defective internal speaker; faulty audio amplifier IC; damaged accessory jack.