Green hue/cast - M4U/25

[msamiullah]

I recently acquired M4U/25 cab and need helpe with few things: I noted there is a green hue/cast on the screen, in test suite this is how the black screen looks like: How can i fix it ?

Secondly, can some please tell me what are these for:

Lastly, there is a strange smell coming out specially when the cab is running, what could it be related to ? and how can I get rid of it ? Thanks

 

[brad808]

I don't know which Mon you have... but you want to adjust "green cutoff". lots of Mons will have a potentiometer for this... g cut, green cut, etc.

 

[nem]

Secondly, can some please tell me what are these for:

Audio amplifier and power transformer.

 

[msamiullah]

thanks @nem here is another example of the same cab, it doesnt have any of it, any reasons ?

 

[nem]

The amplifier has been retrofitted. It's actually originally from a Net City.

MVS outputs amplified signals, so you don't necessarily need it. The audio quality might be a bit better with the separate amp though.

 

[msamiullah]

the power transformer I am assuming is a isolation transformer which is optional I guess (to reduce interference/eliminate grounding loop) ?

 

[nem]

It's not optional. The amp expects 17V AC.

 

[msamiullah]

gotchya, thanks

 

[Crunch]

Is the smell like fish? If so, could be coming from the caps, presumably from the chassis or PSU.

 

[msamiullah]

Yeah its pet animal like

 

[msamiullah]

Is the smell like fish? If so, could be coming from the caps, presumably from the chassis or PSU.

thanks. So the caps leaked at some point and liquid from leaks now burn when the machine is on?
Where do I start with this, look at the chassis and PSU and sound amp board to see if there are any stains from the leaks?

 

[Crunch]

Preferable to recap both IMO but if you just want to get rid of the smell you could clean down the boards and just replace the smelliest caps. Might be hard to determine which ones those are exactly though.