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jgamtmann2(at)gmail.com
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 Posted: Wed Jun 20, 2012 4:18 pm Post subject: 1562A problem |
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I have several trusty Schumacher 1562A maintainers, but one of them suddenly stopped maintaining and stayed on charge (yellow light). I fortunately caught it in time to keep the AGM battery from being damaged. I tried it on another AGM and same problem. Schumacher says that the unit can not be repaired since it is a sealed unit. Doesn't appear sealed to me. I took it apart and the transformer and PCB are plainly visible. Can anyone advise me as to how to check what the problem with the PCB might be? I'm not an electronics type but an ME, so I can follow directions. If I can't fix it I'll buy a new one, but my inclination is to rather fix than buy.
Jurgen Amtmann
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skywagon
Joined: 11 Feb 2006
Posts: 184
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| Posted: Wed Jun 20, 2012 6:06 pm Post subject: 1562A problem |
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Jurgen,
Since you opened up the box, there is probably a small pot that can be adjusted. That maybe bad or just sitting on a bad spot on the potentiometer. Turn the pot wiper a small amount and clip it back to a battery and see if it will regulate and go to a float mode by watching with your voltmeter.
If it will not regulate then the solid state regulator chip has probably gone bad.
Most of the "low cost" maintainers like to be powered up in a set sequence.
Connect clips to the battery first, then, plug into wall power. And, reverse that to shut down. AC power off first, then unclip from the battery. Not sure how many cycles they can take if not done in that order....
D
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