2. amps-preamps
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ML-380 preamp problem.

I am using a second hand ML-380 premap. Some times when I use the manual volume knob, it does not respond, then I have to give it a big twirl to make it
respond. And then some times the pre-amp just hangs when I touch any manual
control, this happens very rarely though.
I face no problem when using the remote. Has any body else faced similar problems with any of ML products.Any comments would be welcome.
indirstr8s
drt's avatar
drt
16 posts
 
I have owned one ML38S, and three ML380S and two of them have had similar problem. I put a bit of contact cleaner on the connector that connects the volume control ribbon wire to the board. That solved the problem. I do not know about the other manual controls on the front panel.
aball
2,016 posts
 
Have you unplugged and replugged the preamp? It sounds like the microprocessor is hanging up and might need a hard reboot. Worth a try anyway.

I once had a Classe CP50 that did exactly what you describe. I got used to unhooking interconnects while my McIntosh preamp was on, just set to an unused input, and never had a problem but it turns out the Classe can't handle it. The volume would hang and sometimes it wouldn't switch inputs afterwards. A hard reboot got it back on track and I didn't have any issues after that. And I started turning it off when making connections....

Arthur
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