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HP 1740A Gain vs Position Problem

Discussion in 'Troubleshooting and Repair' started by BarryR, Jun 1, 2019.

  1. BarryR

    BarryR

    2
    0
    Jun 1, 2019
    The vertical gain of both channels varies with position. For instance, at .2v/div with a 10x probe, the calibrator reads 2.5 divisions with the image centered on the screen, and 3 div when set to the upper or lower part of the screen. Any ideas where I should start looking? I do not have another scope to troubleshoot this with.
     
  2. Ylli

    Ylli

    220
    46
    Jun 19, 2018
    Same issue on both channels? I'd start by looking at the power supply. Make sure all the voltages are right and that they do not vary with vertical position adjustments.
     
  3. BarryR

    BarryR

    2
    0
    Jun 1, 2019
    Sounds right. Thanks.
     
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