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Broken Mcintosh Meters

I just picked up a Mcintosh MC2125 and discovered the meters don't respond when music is playing (back lights are fine).

I've been scouring the Internet for a description on how to repair, but have yet to find anything to help.

Can anyone provide some instruction as to what needs to be replaced in order to fix the unresponsive meters? I'm living on student loans, so sending it to Audio Classics or anyone else isnt a possibility..
hockey4496
mlsstl
1,424 posts
 
You'll need to determine if the meter itself is physically bad or the circuit driving it.

If you've got any sense of adventure, the first step would be to remove the cover and make sure a connection hasn't come loose.

Beyond that, you'll need test equipment, experience with electronics and probably a service manual.

If you're not capable, don't know anyone who is and don't have the funds for a service visit, you're probably stuck. At that point just be happy the unit plays and it's just a visual effect that's broken.
gbart
290 posts
 
Hockey4496, I have the service manual for the MC2125. Send me a PM at sae_2300@optimum.net and I will reply with a copy of the SM. There are several stages (fullwave rectifier/over scale limiter/sample & hold/meter driver/between the output and meter, so a problem in any one of them could cause the meters to stop working.

Glen
marakanetz's avatar
marakanetz
5,473 posts
 
they prone to get stuck within the time
hockey4496 OP
104 posts
 
Thanks guys for the feedback. I actually have the service manual, and am comfortable at all levels when it comes to electronics. Will I be able to just check each of those circuits along the way for continuity? Or is there some other equipment I would need to test their functionality?

Thanks again!
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