problem with Technics SU-Z45 Power amplifier

[darshanwijekoon]

Hi, need help!

This amp blew along with its speakers just recently with burning smells all over!

i've used it for 10 years now with no fuss.

can you tell me how to fix it?

Thanks.

[Hankerus]

My SU-Z45 blew up recently too. It was only the filter capacitors. A lot of screws need to be taken out to get to the bottom of the main circuit board, but just de-solder the two main capacitors and replace them and the fuse. That fixed mine anyway, yours could be a different fault.

[Mariodas]

The problem is probably not in filter capacitors, altough they should be
replaced because their lifespan is around 10 years.

If speakers blew as well, than output transistors (or IC) made burning smell.

Try to replace all active elements and see if would work.

This would probably save you time and nervs.

[TomWaits]

Originally posted by Mariodas
The problem is probably not in filter capacitors, altough they should be
replaced because their lifespan is around 10 years.

If speakers blew as well, than output transistors (or IC) made burning smell.

Try to replace all active elements and see if would work.

This would probably save you time and nervs.

This little "gem" of an amp has a STK module or something very similar attached to its heat sink. I had one many years ago and I miss that integrated amp. Crack it open and tell us the part number on that big IC in there.

Cheers,

Shawn.