Logitech Z906 Service Manual Patched | FREE × Series |

As of April 2026, there is no official or "patched" service manual released by Logitech for the Z906 Surround Sound system Go to product viewer dialog for this item.

Conclusion

Mount the new resistors with a slight air gap from the PCB and capacitors to improve airflow. Remove any "black rubber" or glue around them, as it can become conductive after years of heat cycling. Logitech Subwoofer Z906 Power Supply repair part 2 logitech z906 service manual patched

  1. Check the TVS diodes and MOSFETs on the primary side of the transformer.
  2. Replace the startup resistor (often a high-value resistor, e.g., 470kΩ or 1MΩ) which frequently goes open-circuit. Correction from Official Docs: Official schematics may list an incorrect wattage for this resistor; use a 1W or 2W metal film resistor for a permanent repair.