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AMPLIFIER LUXMAN A 353

ALF33 Posted messages 4 Status Member -  
fabul Posted messages 42079 Registration date   Status Moderator Last intervention   -
Hello
I HAVE A LUXMAN A 353 AMPLIFIER AND FOR YEARS THERE HAS BEEN NO SOUND ON ONE CHANNEL AT STARTUP; I HAVE TO TURN UP THE VOLUME TO RESTORE NORMAL FUNCTIONING ON BOTH CHANNELS; AFTER THAT THIS AMP WORKS WONDERFULLY; COULD YOU PLEASE EXPLAIN TO ME WHERE THIS PROBLEM COMES FROM? AND WHAT TO DO TO FIX IT THANK YOU IN ADVANCE;

1 answer

Answer 1 / 1
fabul Posted messages 42079 Registration date   Status Moderator Last intervention   6 054
 
Hello,

The relay (the one that clicks when it turns on) must be oxidized.

It can be cleaned or replaced.

For cleaning the contacts, I use Brasso, finishing with alcohol or window cleaner.

It would be better to desolder, disassemble it for a proper cleaning, unless you can soak and dry it well inside without wetting the transformer.
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ALF33 Posted messages 4 Status Member
 
THANK YOU VERY MUCH FOR THE INFORMATION. I WILL CHECK ON MY SIDE AND GET BACK TO YOU. WHERE CAN I FIND THIS PRODUCT?
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fabul Posted messages 42079 Registration date   Status Moderator Last intervention   6 054
 
It probably needs to be opened for cleaning; it's not necessary to replace it.

It's easier to clean, but be careful of the wires on the sides of the coil.

I can't tell you where to find another one if needed, maybe on the Mouser website.

https://www.mouser.ca/Electromechanical/Relays/_/N-5g31
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ALF33 Posted messages 4 Status Member
 
IS IT REALLY THE LARGE GRAY RELAY RY501 LOCATED NEAR THE TWO BLACK CAPACITORS OF 8200MF?
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fabul Posted messages 42079 Registration date   Status Moderator Last intervention   6 054
 
I can't say, just tell you that it makes a click when turned on.

Often, the cover is transparent, but it can be gray.
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fabul Posted messages 42079 Registration date   Status Moderator Last intervention   6 054
 
A contact cleaner is not enough.

If the relay opens, rather buy Brasso

With a toothbrush.
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