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HP1740A Repair

Discussion in 'Electronic Repair' started by ronspencer, Mar 6, 2005.

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  1. ronspencer

    ronspencer Guest

    Traces comes on full bright and intensity control has little affect
    Manual indicates ther should be .4V on pin 3 of U1 but I get -.61V
    Pin 7 reads -.176V which baffles me as the schematic shows 3 and
    shorted together. My thinking is that U1 is bad

    Any thoughts

    Thanks much

    Ro
    Raleigh, N
     
  2. N Cook

    N Cook Guest

    According to my 1740A manual and U1
    pin 7 is +15V and pin 3 is non-inv i/p

    electronic hints and repair briefs , schematics/manuals list on
    http://homepages.tcp.co.uk/~diverse
     
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