Dido Posted October 19, 2004 Report Share Posted October 19, 2004 I have a problem with my DMM. I OverVoltaged it It can mesure up to 1kV I measured maybe 5kV with it. Now It displays on the 3.5 LCD Display just the number 1 whatever I try to measure Ohms Amps Capacitance frequency etc... I opened the multimeter and I saw nothing interesting there five or six Op-Amps a main chip made on the PCB board which I most probably think that is the ICL7106 - this is an analog to digital converter, lcd display driver, there are although some analog circuits inside there. I want to ask you Is that IC the problem (I think it is) I`ve attached the schematic see it nothing else I just want someone to advise me should I try to change the IC or throw it away.I think that if I change the IC it will most probably work. Maybe I`ll have to tune it up a little. ??? Quote Link to comment Share on other sites More sharing options...
ante Posted October 19, 2004 Report Share Posted October 19, 2004 Check the voltages on the 7106, first the supply then the inputs. If you are lucky it Quote Link to comment Share on other sites More sharing options...
steven Posted January 15, 2005 Report Share Posted January 15, 2005 :)if all else fails get another multimeter and remember anything higher than 1000 volts you would need a high voltage resister devider to help and with your multimeter you can measure these high voltages if any voltage you measure exceeds the maximin voltage rateing of your multimeter then you may have problems Quote Link to comment Share on other sites More sharing options...
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