2. amps-preamps
  3. 1351205787

MX 110 Troubleshooting

I recently purchased a Mcintosh mx110 z series tube preamp and am having a problem with one of the channels.
Left channel has very low and then no volume when I turn the amp on. If I turn the on-off switch on and off; sometimes the sound comes back on the left channel when the switch is in off position. Then it may stay working for 20 minutes or so before it fades to no volume again.
Not sure what type of problem this could be.

Any help would be appreciated.
nikef5s
brf
1,715 posts
 
Sounds like the caps are starting to fail.
rrog
1,958 posts
 
Start with the simplest thing first. Try cleaning all switches, buttons, etc before doing anything else.
mcintech
128 posts
 
Clean the pots and switches, especially the volume pot. My vintage gear has your exact symptoms when they need cleaning. With power OFF, spray pots and switches with NON residue electronic contact cleaner and exercise the switches and knobs for several minutes each, then spray again to remove contaminates loosened by the switch wipers.
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