will all those with technical knowledge of the m512 plese come forth...

  • Thread starter Thread starter bluesboy87
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bluesboy87

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thanks for reading through this...

I have a tascam m512 that has developed a constant problem...get there in a minute.

When I bought it a few years ago, it had an issue where occasionally the meters (all of them) would peg and flash the peak lights, and would then be rendered useless. this would happen wether there was signal going to the board or not, and you never knew when.
Although it did seem to happen more often if you put signal to the board before it had a chance to warm up.
And when I say the meters peg, I mean a quick hit all the way right, and then drop back to normal. sometimes followed by a high midrange errr... note.
Then at some point it became very usable, being able to leave it on for hours (or overnight) with no problem.

Any way, after not attempting to use it for quite a while it is again useless.
Soon after you turn it on (30 seconds or so) it pegs all of the meters and then the meters for the "stereo master " stay about half mast with they're peak lights on.

so...I'm thinking i have option A and B or maybe B then A if B doesnt work:)
Option A: its time for a recap, that is...replacing all (sheesh) of the electrolytic capacitors that are most likely toast. or B: borrow someone's variac, and try to slowly run it up on that.
Im not sure if it is actually possible to "reform" a cap, but its worth a shot before I open her up.

Do you have any suggestions? or guidelines about how to open this thing up?
or where the most likely suspects are? what you think is going on? anything?
thanks guys, Im open to ideas and suggestions.
thanks again for any help.

josh
 
Odds are you have a wire harness with oxidized contacts somewhere in the board which would just need a cleaning and re seating of the harness to clean the connection. Start with the power supply wire harnesses and work inward from there...also tighten up any loose grounding screws.

Recapping is not gonna do anything for you.

Cheers! :)
 
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