One Dollar Onkyo TX-SR508 Receiver - Won't Come Out of Protection
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- Опубліковано 22 вер 2024
- Today I'm trying another receiver repair to make myself more comfortable around amplifiers. Got this one for crazy cheap, so there's not too much at risk on this one. This is a TX-SR508 that goes into protect immediately on power up.
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My Top 5 Cassette Decks for Sound Quality:
1 - A&D GX-Z9100
2 - Aiwa XK-007 / Carver TD-1700m (tie)
3 - Technics RS-B755m
4 - Teac V-900X
5 - Sony TC-K75 (TC-K81)
you are on the right track... that transistor for sure is one of the last faulty component left.. keep going... you have to get over your failing fear and the only way to do that is keep going.... can't wait for the second part on this receiver!! I did give you the substutes for that transistor....
Yep, that's why I bought so many of those replacement transistors. Wanted to give myself a reason to do this again someday.
ow yes, almost every time power transistors fails, they get some other parts to the death with themselves... Very nice video - as always! Cheers!
finish what you start you learn by your mistakes
about the other transistors... yes you can find replacements for them they may have other pinouts but you can just make a little adaptor board for them.... and as long the current they can handle are the same or more they will be usable as a replacement... but then you got to change them all !!!! timestamp 25:31
So far so good. It seems like you've got the major problems taken care of, now time to clean up the little ones.
I would double check Q6031 again. That burnt resistor on the base of Q6031 was due to high current passing through it. That same current went through the base of that transistor. Hopefully it was rugged enough to handle it, but it concerns me none the less.
That's one of my main concerns as well. I really wanted to replace those pre-drivers.
for the bias pots... the values you are measuring also depends on other components in circuit around the pots... so not a good way to test them this way... in my experience the pots are ok!!!! that is at timestamp 23:57.... now I continue watching :)
That transistor resistor never seen before..... JK yeah common for transistors to fail in such a way, these consumer grade amps are a nightmare to repair unlike the rackmount professional grade equipment far easier.
nice video i shall sub, i shall let other E.E guys know too.
Do you use dim bulb tester for short circuit protection?
When needed.
you got a new subscriber.... if you need help with things ask... I may be able to help !!!
Thanks!