Logitech Z906 Service Manual
This is the most common issue, often caused by a failure in the standby transformer or the main power supply unit (PSU). The service manual indicates that the standby power supply is a known weak point. Transformer, rectifiers, capacitors. 2. No Sound from Specific Channels
Replacement power supplies or amplifier boards are occasionally available from third-party sellers, but always verify voltage and current ratings before installation. logitech z906 service manual
The large capacitors near the AC input, the MOSFETs on the primary side, and the transformer primary winding are all potentially live. Never touch the power supply board with bare hands while the system is plugged in. Always discharge capacitors with a suitable resistor before touching the board, even after unplugging. This is the most common issue, often caused