Luxman M-02 can't set bias on the right channel !! see why?

this Luxman came to my bench with just a regular servicing but ran into a big issue along the way.
hope you enjoy this video, leave comments and PLS subscribe to my channel.
#luxmanm02oldsoldering,#audiobiasoffset,

[@jameswarren1831]

Saving people and saving audio equipment, you sir are a saint:)

[@VintageAudioFever]

Haha far from a Saint but thank you James...

[@mamavolkswagen]

you are an inspiration senior. Long live and stay blessed, From Thailand

[@AdamMcGrath-u8h]

Thanks again for the great service Joe. Excellent job finding those broken solder points and touching them all up. Appreciate the work you do

[@craigm.9070]

Surprising to see heatpipe cooling in an early/mid 80's power amplifier WAY before the PC world adopted in for its efficiency. Thanks for your time posting this one!

[@TrevorsBench]

Great job on that Luxman Joe. The owner is sure to be happy with it now

[@VintageAudioFever]

Thank Trevor'

[@icqjackie]

what a nice technical video and thanks for sharing :)

[@Trucam2020]

Thanks for your shering.

[@robertodaluz8523]

Excellent work, the video is extremely detailed!! I have a Luxman M-02, could you tell me where I can make the offset adjustment?

[@VintageAudioFever]

Hi Robert...if you look into my videos somewhere I'm dure I've worked on a M02 before....

[@dell177]

WE used to call that the black ring syndrome. It can be caused by to cool a soldering ieon when built OR a component lead being subject to vigrastion that can crack a solder joint. If I suspect a vibration problem I';ll wrap a wide around the component lead and run over to a solder trace away from the cracked joint.

[@VintageAudioFever]

Hey Dell177
I think you have a real good point here...as I read your message a few times... typos!!? just to help other to understand a little better....
I'll wrap a 'wire' around the components.... (Good point).
Vigrastion - 'vibration' I think 🤔
Elaborate if I didn't correct properly...
I think ' the wrap around wire is a great idea ...it makes a lot of sense

[@dell177]

@@VintageAudioFever i worked for a power supply company for decades and we started to ru into problems when we started to solder TO-3 type devices directly to circuit boards. GThe flexing of a heatsink in relation to the PWB would lead to cracked joints, we found adding a wire in parallel to the solder joint solved the cracked joint problem till we reworked the design to attatch the board more rigidly to that heatsink.
Between being half blind and having a tremor my typing leaves alot to be desired - just one of the curses of being 76 years old.

[@mfharper44]

Do you do repairs for hire?

[@VintageAudioFever]

I will start in the fall....
What did you in mind?

[@mfharper44]

@@VintageAudioFever I have a pioneer sx 650 that I would like to have recapped and adjusted. I just noticed that your in Canada though. I'm down in southern Indiana in the US.

[@AngelCordova-ch2ov]

Hey can i send you my mini fridge it hasnt been working lately

[@VintageAudioFever]

What's wrong with it ?

[@AngelCordova-ch2ov]

@@VintageAudioFever it dont work like no respond of technology