handles the digital decoding (Dolby Digital and DTS) and user interface download01.logitech.com
: If the system is stuck on mute, check the "enable" lines on the pod connector (pins 6, 7, 8, and 13). Expert Community Guides logitech z-5500 schematic diagram
On the subwoofer’s main board, the I2C communication lines (SDA/SCL) connect to the control pod via pins 4 and 5. The schematic will show 4.7kΩ pull-up resistors to 5V. If these resistors drift high, the pod says “No Communication.” handles the digital decoding (Dolby Digital and DTS)