Onkyo Tx-SV434 wont turn on, looking for service manual or tips

[cdev]

Hello, I recently acquired an old Onkyo TX-SV434 receiver, for free, the outside looks nice but very dusty inside.

After a bit of an internal cleanup, it still hasn't worked, it is stuck in standby mode and does not come out of standby when I press the power button.

It probably was sitting in a garage or basement for a long time from all the dust inside of it.

It weighs quite a bit. These were quite nice receivers back in the day with decent audio specs. And quiet, when working.


Also the power switch may be broken, its hard to tell if that is the problem, it may just be a soft power switch.  It appears to have been worked on before.   My first assumption which may be wrong is that a built in safety mechanism may be preventing it from turning on because of a problem like a blown audio output transistor or similar.

Does anybody have a service manual for this specific receiver? I'd like to fix it and use it on my bench. Lacking the manual its hard to know what connections on the huge internal IC are the ones that could bring it up. So I figured I would ask if anybody has some experience with it first. It would be a nice receiver if it was working.. Apart from the huge control IC everything else looks fairly generic and easily replaceable.

[SpecialK]

https://www.manualslib.com/manual/698467/Onkyo-Tx-Sv434.html?page=9#manual

[cdev]

Thank you, SpecialK.

This is a good time to catch up on all my partially finished projects. It would be great to get this working. If not I can probably extract some decent parts out of it. (the transformer looks useful)

I figure its worth putting a little bit of money into in the interests of having a nice tuner/amplifier next to my electronics area. Its going to be fun cleaning all that dust out, its nasty!

Figure I will try 70% IPA first.