Blaupunkt 937 Head Unit Schematic / Buttons don't work
I just got my 2003 Alfa 147 1.6 TS back from the garage (for a clutch change), and my radio started acting up. At first the backlight of the radio controls flickered a bit, but all controls stilled worked. Three days later after much flickering, the radio completely stopped responding. The volume, skip, source etc.. buttons all don't work. The only button that stills works is the On/Mute button. At the moment i have to listen to the radio at the preset volume with the song of its choice (rather annoying), with no choice in source or track number for that matter.
I'm thinking its a power supply problem, perhaps a spike occurred whilst it was in the garage which damaged some power regulator in the radio, and now the button logic is not function.Te display is also completely dead, the button back-lights still flicker though.
Has any one else had similar problems?
Does anyone have the schematic for the radio, i'm fairly confident that i could find the error with this document.
Any advise is appreciated.