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Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems. |
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#1
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Can I salvage my GB Instruments multimeter?
I was playing with the wonders of transformers in series and somehow
fragged my multimeter (sure, the voltage was like 1000V, but at like ..0000001A ) and anyways, now I get a steady 4.5V AC for my main wall (normally about 121V if my memory serves me) current and .05V DC for fully charged NiMH AA's (normally around 1.65V). Is it possible my multimeter's voltage sensor has been reprogrammed by the high voltage to a factor of about 26? Can this be remedied without trashing my precious multimeter? GB Instruments GDT-11 multimeter. $20 at Wal-mart. -Andrew |
#2
Posted to sci.electronics.repair
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Can I salvage my GB Instruments multimeter?
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#3
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Can I salvage my GB Instruments multimeter?
Most recent cheap digital ones have the main chip bonded to the PCB with a
plastic blob over it , and can only be repaired by replacing the whole PCB. You would never be able to get one ,and therefore would be uneconomic. Earlier models used the famous 7106 A to D chip which can either be unplugged ,or unsoldered from the PCB ,and replaced for about £5 British Pounds "Ross Herbert" wrote in message ... On Sat, 31 Dec 2005 01:30:24 GMT, James Sweet wrote: wrote: I was playing with the wonders of transformers in series and somehow fragged my multimeter (sure, the voltage was like 1000V, but at like .0000001A ) and anyways, now I get a steady 4.5V AC for my main wall (normally about 121V if my memory serves me) current and .05V DC for fully charged NiMH AA's (normally around 1.65V). Is it possible my multimeter's voltage sensor has been reprogrammed by the high voltage to a factor of about 26? Can this be remedied without trashing my precious multimeter? GB Instruments GDT-11 multimeter. $20 at Wal-mart. -Andrew Unless you just want a challenge, buy a new one, it's not worth much effort for such a cheap meter. Good advice. The GDT-11 is even cheaper than USD20 here http://www.electricsupplyonline.com/...11_w018009.php |
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