Very hot aluminum amplifier on Lasonic TRC-931?

[FRizzo17]

Got both decks to work then I noticed that the top , I believe its the left speaker, aluminum amp gets very hot but the other is fine. Any suggestions? Ideas?

 

[Bru87tr]

Same thing happened on my pioneer. Don’t run it, you will blow the speaker on that channel and or amp chip too.

I was told a cap in line on that channel might be reason. Over my head and sold it.

 

[floyd]

I would at least place new thermal grease between the heatsink and the amp chip. The thermal grease loses its potency over time.

 

[Hajidub]

Would be nice to be able to download a service manual and check the DC offset on these.

 

[hopey]

You can buy the service manual. Found this thread on a fault with these.

Left channel not working Lasonic TRC-931

Original Problem found!! How to replace center tap pots. TRC-931 Hi everyone, I'm trying to look for some help on this vintage Lasonic ghetto blaster. I gave up trying to find the schematic as it and a service manual seem to be impossible to find. It uses two two TA7270P ICs for the...

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