Using the partial schematic or the pinout above, experts have traced this back to the on the power supply board inside the subwoofer. In many cases, the problem isn't the regulator itself, but the two resistors connected to the ADJ (Adjust) pin of the LM217. If these resistors drift out of spec or have a cracked solder joint, the regulator will output the wrong voltage. Replacing or re-soldering these resistors is often the permanent fix for "Pod Failure" issues that a new control pod won't solve.
Broken or shorted wires inside the DB15 cable can cause the pod to lose power, show a blank screen, or omit specific audio channels. 2. The Power Supply Unit (PSU) Circuit logitech z-5500 schematic diagram
Leaky capacitors (electrolytic) around the power supply filter or amplifier ICs, or damaged TDA7294 ICs. 3. Key Sections of the Z-5500 Service Manual Using the partial schematic or the pinout above,
Whether you are bypassing a dead control pod or replacing the caps to stop the hum, the tools and information are out there—they just require a bit of searching through the archives of Elektrotanya and the forums. Good luck with your repair. Replacing or re-soldering these resistors is often the
The Z-5500 utilizes Class AB amplifier chips, specifically the or TDA7293 monolithic integrated circuits.