Victor M-L10 won’t go out of protection

[Ren_]

Recently I bought a victor M-L10 and it was working at the seller’s place. Brought it back and the amp is working fine and I went ahead and checked dc offset and bias.

Something was off when I turned it on to tune the bias and dc offset. The meter stayed Red, but I didn’t bother. When I put back and hooked it all up to the speaker and input, there was no signal out from the speaker.

I followed the service manual and it said to check voltage dc on two points of the circuit and there is indeed DC. The manual concluded in my case it is the protection circuit at fault as the meter did not turned white.

I enjoyed my 1hour of listening to the amp but I want to hear it again. Please help me on where can I go forward

 

[AudioAvarice]

As it's the 'Victor' version, are you powering it at the correct 100V AC ?

 

[Ren_]

Yes I am, I’m using it with the step down transformer. My friend told me that there shouldn’t be any issue with the protection circuit but I should looked for dull and cracked solder joints.

 

[Ren_]

Amp now is out of protection, just main circuit board dull and cracked joints.

 

[GD70]

Amp now is out of protection, just main circuit board dull and cracked joints.

GREAT amp! Glad you got it working. What pre you using with it?

 

[Ren_]

GREAT amp! Glad you got it working. What pre you using with it?

Currently I'm using a naim Preamp a nac 62, it sounds great though. Regarding the M-L10, its in okay state, but im going to restore it with the best of my abilities. it has missing plastic PCB support, missing screws, aged capacitor that is bulging a little on the smaller circuit, dreadful double diodes that is in need of replacing. And most importantly, a thrashed wood case, but ill take it to a furniture wood workshop.

 

[GD70]

Currently I'm using a naim Preamp a nac 62, it sounds great though. Regarding the M-L10, its in okay state, but im going to restore it with the best of my abilities. it has missing plastic PCB support, missing screws, aged capacitor that is bulging a little on the smaller circuit, dreadful double diodes that is in need of replacing. And most importantly, a thrashed wood case, but ill take it to a furniture wood workshop.

Take your time with it. Not an easy amp to work on. Your Nai is an interesting pre, very cool looking piece!

Some bathroom reading in your spare time, including cab restoration for my M-7050 and P-L10 preamp.
https://audiokarma.org/forums/index...pre-amp-some-pics.588994/page-24#post-9778745

 

[Ren_]

Take your time with it. Not an easy amp to work on. Your Nai is an interesting pre, very cool looking piece!

Some bathroom reading in your spare time, including cab restoration for my M-7050 and P-L10 preamp.
https://audiokarma.org/forums/index...pre-amp-some-pics.588994/page-24#post-9778745

So far it doesn't look very complicated, easy to access and it has a well documented amp with bunch of info. the only issue is the weight and the sheer size.