Problem with right channel on vintage Denon PMA-501 amplifier. No sound... Any advice? Thanks...

You just need to replace your volume knob for a better one , a couple of bucks 10 dollar

Hi,
Check the link for the capacitor.
1nf/50V

hi.
Did you checked balanced impedance?load speaker impedance vs PA output?or PA might over driven,causing a trouble on the pre-amp to power amp circuits and components damage,
need to recheck related components on the pre-driver up to main output section,

Note: That,blowing of fuses with the same rating is an indication of trouble/shorted in a circuits that driven on it,

Thanks and good luck

microhit

The good news is that it's in one channel, which means you have the right channel parts to compare it with. Now the bad news whatever causing it and it's likely to be a semi-conductor (transistor or IC) has to be replaced. However finding it is easier than you might think. For a start it's going to be hot to touch. And you can get get it to stop being hot, while the amps on, so correcting the fault, for a while. You do this by spraying it with Servisol Super Freezer spray. You have to have the amp running for this. Find the left channel amp and wait while it goes bad. Then spray (one at a time) any part you suspect. If the sound returns to normal, you have found the faulty part! To prove it spray the same in the right channel. That shouldn't change.
You can get the freezer spray from your local electric parts shop (such as Maplin UK).

Just have a look around first. Remember the left channel will be the same as the right, so if it doesn't look the same in the right as the left you have the cause of the problem. Resistors are good at causing it, but transistors can too.

That model shouldnt be stuck in stand-by
Are all the speakers connected?
If it wont properly turn on then there is a fault being detected. Could be disconnected speakers / bad speaker or a power supply issue

Try a set of headphones and see if the high end works in those.
Also , is the treble on the amp turned way up?
Get back to me
Thanks

Hi there
You can download one from here Select the FREE download button and you will get a PDF copy of the manual. Let me know if you have any problems getting it. Cheers
regards robotek

Determine if it is both left and right channels. If it is then you are looking for something that is common to both channels as the cause. It could be something to do with the tone circuit, perhaps an IC, another suspect is the bias section. And if only in one channel then at least you have something to compare it when seeking the fault.

have yoou tried to find in ebay.? they should have one there.