r/audiorepair • u/bruno7298 • 2d ago
Broken Denon AVR-2312
I’ve just moved flat from the U.K. to Spain and in the move my Denon receiver looks like it took a bit of a whack, the front panel has a dent etc. I went to turn it on and it boots before going onto the blinking red light issue after a couple of seconds. I’ve downloaded the repair manual and gone through the debug process and when I disconnect the speaker board the amp stays on and it displays that the previous fault was an ASO protection which apparently means there is a short in the signal path, such as speaker wires touching but it happens even when no speakers are connected. Does anyone have experience with these in the past? The fuses are fine. The PSU is producing the correct voltages when the rest of the pcbs are disconnected so I don’t think it’s the PSU issue some other owners have had. I’ve tested the transistors and resistors on the amp board and I don’t think any are off, the parallel pairs are measuring between 0.2 and 0.3 for parrallel .47Rs and the transistors are doing 0.45-0.65V between the legs. Some of the resistors do have some discolouration though that they might have got a bit hot at some point. My feeling is it is a loose connection somewhere but I can’t see it and I’m not too keen on going further into the big hdmi/power amp pcb stack as I don’t think I’ll get it back together. Is it worth me replacing the resistors in case that is the issue? Any other tips before start removing components?
1
u/someMeatballs 1d ago
Measure any suspect resistor. In-circuit is often fine, but sometimes the value is lower because of the circuit. Never higher, if it's stable. Capacitors charging can show strange values, but then it will be changing over time.
Look for board cracks, and cracked solder joints especially on mounted components, connectors, switches.