- Thread Starter
- #21
Thanks! Just an update: we figured out that it’s a 100% related to physical temperature of the unit. Every single time if we leave it overnight in the garage, it works in the morning when we plug it in. However after it’s warmed up if we unplug it and plug it back in won’t work anymore.It is going to a graduated troubleshooting experience in that the low hanging fruit will be picked off firstly and as things become more complicated they will eventually reach a point of determining that it's junk material.
Troubleshooting without schematics and parts is always a crapshoot.
So... this will probably require at a minimum:
1) (Do the visual inspection) Screwdrivers to take the power supply out and inspect it for leaky capacitors, bad solder or anything unusual to the eye. Use a magnifier if you have one.
1b) (Do the visual inspection) Remove the amp PCB and visually inspect for anything.
1c) Perform re-soldering as required and repair failed parts if req'd.
2) (Capacitor diagnosis) If nothing bad found visually then use a multimeter and a ESR meter to meter out the power supply capacitors and power supply by unsoldering stuff and then connecting probes and using the meter or just replace the capacitors and be done with them without buying meters.
3) (Test for change) Reinstall all connectors and PCBs and power ON and test for operation.
4) If proper operation end or if not then go to #5.
5) New flow chart required...lol.
We figured out that it keeps working as long as we only set it to standby and don’t take it off the power completely. It seems like it really has to do with the power being supplied when it’s first starting.
For budgetary reasons we’ve decided to just keep using it and leave it only on standby for now, and we’ll look into a repair at a later point. The home repair seemed a little too complicated for my partner so most likely we’d bring it to an audio repair shop.