Are you planning to like the control pod, or are you looking to bypass it for use with a different receiver?
The pod connects via a DE-15 (VGA-style) connector . There are two versions of this pinout (referred to as PID versions), so ensuring you have the correct diagram for your specific serial number is critical when attempting a bypass. 2. The Power Amplifier Board logitech z-5500 schematic diagram
However, time is the enemy of electronics. A common refrain on Reddit, AVSForum, and FixYa is: “My Z-5500 control pod is dead,” “The subwoofer hums but no sound,” or “The amplifier cuts out at high volume.” Are you planning to like the control pod,
If you need the pinout for the DB-15 control cable (common for bypassing a broken pod), detailed diagrams are frequently updated on diyAudio forums and Head-Fi . Common Failure Points for Repair Common Failure Points for Repair