I just bought an eBay 'fixer-upper' DVD-Player/Receiver that has one faulty amp channel (out of the 5 x 120watt channels). I'm not familiar with these amp modules as they are the new-ish S-MASTER module (I think they're the first generation. They're marked 2X03). I can't even find anywhere to buy a replacement if I need one.
Symptoms are:
A) the receiver goes into Protect mode when I turn it on and play anything UNLESS I have the headphones plugged in, presumably because that takes the amps out of the picture. (Actually it goes into Protect once the Voltage to the amplifier board rises to about 47V. 50V is normal). B) if the headphones are in, then the receiver all works fine BUT the headphone audio level is quite low. C) I don't have my scope handy but the resistance across the output terminals of 4 of the channels rises slowly from about 1M ohm to infinity (overrange), while the suspect channel stays at about 1M ohm (or does this mean a shorted cap right at the output?)
Ideas about the fault? Schematics? Service Manual? Thanks! Tony