Need Schematics and Help to Identifying Tthis Type of Mark Levison Device

Hello everyone, I need help to identify this type of device (See in the attached image) it is a sound amplifier in a lexus car with the MARK LEVINSON brand, but I don't know what type it is. my question is:

1. What is the type of the device ?

2. I also need a schematic or service manual to make repairs of this device

Please help if anyone have service manual or schematic of this device. Thank You.

Warm regards,

Jack
 

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