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Mitsubishi Power Meters (DA-M10) - Anybody have answers as to why the level meters work intermittently regularly?

K

kachulis

New Member
Hi

I've been using a Mitsubishi family stereo (now mine) since 1990. Over time, I have acquired four power meters (DA-M10). From day one they would work/not work intermittently. It was always the level meters that fail. Volume, speaker selector and X1/X0.1 button work flawlessly and never fail. I've had technicians "repair" them only to have a channel drop out again -- usually after a couple of months. I've tried the basics (toggling the X1/X0.1 button, lowering/raising the volume via the controls on the meter, toggling the side button that allows you to pick the amplifier you are pairing it with) but they are never consistent for long.

I'm trying to finish off my stereo project I started after retiring but after servicing two of my power meters, one has started misbehaving again a couple of weeks ago.

Has anyone found a solution that works? I'm guessing no but it doesn't hurt to ask. Checked this post (https://audiokarma.org/forums/threads/mitsubishi-da-m10-replacement-meter.896618/) which doesn't leave me too hopeful.
 
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When they stop working, is it both right and left? That would point to possibly power supply issue where it powers the meter driver board. Or something on the meter driver board. If it’s just 1 meter that fails it could be the adjustment trimmer.

Rob
 
Is there a removable cable between the amp and meters? If so, I would verify continuity between the various pins and examine the pins/sockets. I would give the pins/sockets a cleaning with ipa, too. I would also examine the wiring/soldering on the connectors the cable connects to.
 
Funny, I was at an AKer’s house today and he happens to have a Mitsubishi stack, including the meters. I mentioned this thread and asked if ever had issues with meters. He said yes, and saw a thread on AK instructing to clean the RCA jacks. They have worked since. So as mentioned above, clean the jacks and connectors.

Rob
 
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