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sxc 1901F from a micronta multimeter 22-193

Discussion in 'Electronic Components' started by alpibucky, Apr 20, 2011.

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  1. alpibucky

    alpibucky Guest

    Hello,

    Does anybody have a datasheet of this IC.
    My 22-193 readings are wrong and the BATT indicator appears
    continuously, but the batteries are good.

    With my kind regards,

    Alpibucky
     
  2. ehsjr

    ehsjr Guest

    Could it be a dual comparator, NJM2903D ?
    The RS parts list seems to indicate that as a possibility.
    If the chip is a comparator, the circuit is likely dividing
    the battery voltage, and comparing the result to a reference.

    That said, examine the battery connections, and circuit path
    from the battery to the PCB's. More likely the problem
    is in the path somewhere, than a defective IC.

    Ed
     
  3. Franc Zabkar

    Franc Zabkar Guest

    AFAICT, the SXC1901F was manufactured by Seiko Instruments.

    FWIW, the following document lists a service manual, cat# 10824373, NP
    Part # MS2200193.

    Parts List for 220-0193 AUTORANGING FOLDING DVM:
    http://support.radioshack.com/support_meters/doc21/21609.htm

    - Franc Zabkar
     
  4. Shaun

    Shaun Guest

    once those Radio Shack multimeters go astray, that is usually it for it. Go
    buy a fluke.

    Shaun

    "alpibucky" wrote in message

    Hello,

    Does anybody have a datasheet of this IC.
    My 22-193 readings are wrong and the BATT indicator appears
    continuously, but the batteries are good.

    With my kind regards,

    Alpibucky
     
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