Technics amplifier switches off

Technics SE CA1080 Service Manual

there is a chip called an operational amplifier under a heat sink on the pcb,that fails when it get top volumed for two long theres regulators with heatsinks.
it is listed as,

Technics SE -CA1080 amplifier F61 fault,

what is the number on the module?

Hi Aawpharmd,

system control error.
please go for repair shop.
regards,
nuwan

go to technics web site to find out.

hello it sound like the output ic may be in trouble you may have just dry joint on the ic which just resolder it . or there could be a capacitor leaking or they may have swelled up in which you will have to replace. it's best to do some visual checks first i'e look for any burnt parts any capacitor with bulging tops

regards
shaun

Amplifiers get hot. The more you crank the volume up (or use extended for extended periods), the more current is required. When it gets hot, there is a fan motor (on the back), that should turn on. I believe your fan motor (brush) is worn out and therefore non-functional. Under this condition when the system overheats, it automatically changes mode to protect circuits.

Also note: if it works when you initially turn it on (cold) for a few minutes it should work fine...until it starts getting hot inside the case.

The audio amplifier IC damaged

Hi

I belive that you have a lot of dust how is gatherd behind the system in the amplifier and it is preventing it to cool down you need to blow it clean and make sure that you keep the system gets cool air

if the temp in the amplifier gets to high it shut down the system instand of burning it very clever solution from the manufacturer

you have a very good system good luck

please bring a good contact cleaner from radio shack near you and apply the spray over the socket of the headphone(the place where you put your headphone jack)take headphone jack out and apply spray in and insert the jack in and out many times.-also check your system setup and confirm that all speaker are on- no mute button pressed-no cable is disconnected.

I've just fixed a Denon amp with the same problem. Replace the mains plug - especially if it a moulded type. Likely that the wires inside the plug have frayed to the extent that there aren't enough strands left to carry the load when the volume is cranked up.