L322 Audio Amp Circuit Diagram Search

Hi All

2004 Range rover owner here L322, with a complete loss of Audio (everything working but no sound, so strongly suspect the amplifier). Has anyone got or can direct me to a circuit diagram or schematic for the XQK000020 amplifier. I can handle electronic stuff so will be able to hopefully diagnose where the failure has occurred if I have a diagram, but cannot find one anywhere. any ideas please..

bm54 dead

Ok, thanks, any circuit diagrams would help me diagnose easier here. Anyone ?

Not even BM will have info as it would be propriety to the Original Unit Manufacturer....

there is a place in Surrey that can repair the BM54...gooooooooogle it.