Keep going its a good challenge to get this amp working.....i repaired a SR 607 and i found several power transistors dry jointed and also a few dry joints on the main pcb....seems to work ok now.
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....
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.
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
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.
Had burned out left chanell, i managed to repair it amp is working, but its geting like realy hot, is it posible to mod it to have went inside? where could i pull out 12 v for vent?
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 :)
Keep going its a good challenge to get this amp working.....i repaired a SR 607 and i found several power transistors dry jointed and also a few dry joints on the main pcb....seems to work ok now.
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!
also always check the outputs for dc voltage with a dummy load connected and after repair same thing as you may have to adjust the dc offset
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.
finish what you start you learn by your mistakes
Do you use dim bulb tester for short circuit protection?
When needed.
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
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.
Had burned out left chanell, i managed to repair it amp is working, but its geting like realy hot, is it posible to mod it to have went inside? where could i pull out 12 v for vent?
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 :)
Hay i have a ht r 560 and it does the same can you help me go through it
Ps what does the 2 prong connectors that run in the row on the pre Amp section
You need to start with a tube amp
you got a new subscriber.... if you need help with things ask... I may be able to help !!!
Thanks!
I had 1 just like ITIT got hit by lightning!!