Flat Pin BMW Business Headunit - Becker C53

[chrisall]

Hi,has anybody managed to repair the Becker C53 flat pin headunit? It is a common problem of no sound from one speaker or one side. The power amp ICs are surface mount, I can't even find out what the part number is for them. Any service manual or schematic would be useful.The flat pin unit is much less reliable that the older round pin, which is a Philips make and uses completely different amplifiers ICs.Cheers,Chrisall