Logitech Z-5500 Schematic Diagram Jun 2026

If the fuse is good but the pod won't light up, check the voltage on Pins 8 and 9 of the DB15 connector. If voltage is missing, a linear regulator (like an LM7805 or LM7905 variant) inside the subwoofer PSU stage has failed. 2. The "Three Dashes" Error (---) on LCD

Test the voltage between and Pin 6 on the subwoofer's DB25 female port. logitech z-5500 schematic diagram

To deliver 188 watts RMS to the 10-inch subwoofer driver, Logitech configured two TDA7294 chips in a Bridged Tied Load (BTL) configuration. On the schematic, you will see the audio input splitting into one inverting and one non-inverting amplifier chip, combining their output power across the subwoofer terminals. 3. The Control Pod Signal Routing If the fuse is good but the pod

Even when unplugged, the main power supply capacitors can hold a lethal electrical charge for hours. Always discharge them safely using a high-wattage resistor before touching the board. The "Three Dashes" Error (---) on LCD Test

: Audio output straight to the speaker terminal. Pins 9 & 10 (MUTE/STBY) : Must receive a voltage higher than

Measure the DC voltage on the output pin () relative to Ground. Critical Hazard : The output pin must read close to DC. If it reads a high DC voltage (e.g.,