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#1
10-29-2010, 07:56 PM
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Hints on repair of flatbed scanner?
Guys - my flatbed scanner - Microtek ScanMaker X12 USL - has a short and keeps blowing the fuse. I took it apart but cannot figure out how to spot a short. Does anyone have a suggestion? Is there some way to use my multi-tester to ID the short?
I think it got water in it. Sprayed a few spots with elec spray but it still blows the fuse. Will try to attach a couple of pictures. I sure hate to throw it in the trashcan. Thanks. 
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#2
10-29-2010, 08:11 PM
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Quote:
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#3
10-29-2010, 09:29 PM
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First guess would be a rectifier diode. You'll have to unsolder one end of each diode to test it. Second guess is whatever is attached to that heat sink. If it's a transistor, you can really only test it by substitution of a known-good part. You can test the diode effect of each junction if it is of bipolar design. If it fails that test, it's dead.
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#4
10-29-2010, 11:53 PM
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Are scanners so expensive today that you need to waste time diagnosing it or is this a school project?
__________________
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#5
10-30-2010, 01:26 AM
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X2 aklim,
just toss it & get a scanner/printer.
__________________
Grumpy Old Diesel Owners Club group I no longer question authority, I annoy authority. More effect, less effort....  1967 230-6 auto parts car. rust bucket. 1980 300D now parts car 800k miles 1984 300D 500k miles  1987 250td 160k miles English import  2001 jeep turbo diesel 130k miles  1998 jeep tdi ~ followed me home. Needs a turbo. 1968 Ford F750 truck. 6-354 diesel conversion. Other toys ~J.D.,Cat & GM ~ mainly earth moving
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#6
10-30-2010, 12:06 PM
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Nope, I just enjoy fixing things and seeing how they work. Not a dollar consideration.
Moderator - that said, you can cancel this thread. I sent the scanner to the trash today. Found the underside of the board was completely rusted, wire brushed it to no avail. Still popped the fuse. On to the trash.
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#8
11-01-2010, 10:52 AM
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I had a weird problem with my HP scanner. I was scanning some pics for an auction flier and kept getting hundreds of little black spots on my scans. Came to find out that my scanner had been taken over by ants. I took the scanner apart and cleaned it, the ants were easy to kill because they were all blind from the scanner lights.
__________________
For the Saved, this world is the worst it will ever get. For the unSaved, this world is the best it will ever get.
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#9
11-01-2010, 07:19 PM
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Somebody, please, tell me not to go out and get it out of the trash.
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#10
11-01-2010, 07:20 PM
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Quote:
  I once fixed a VCR with some Beer and a Q-tip.
__________________
For the Saved, this world is the worst it will ever get. For the unSaved, this world is the best it will ever get.
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#11
11-01-2010, 07:25 PM
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The only thing that would work Is a B.F.H Scanners are cheap... buy a new one or look on craigslist for one
__________________
hum..... 1987 300TD 311,000M Stolen. Presumed destroyed
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#12
11-01-2010, 07:34 PM
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Guys, I have another scanner. I just hate to throw anything away that can easily be fixed. Hope the trash man comes this week so I do not have to deal with misgivings.
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#13
11-01-2010, 07:48 PM
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Quote:
__________________
For the Saved, this world is the worst it will ever get. For the unSaved, this world is the best it will ever get.
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