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Tektronix 465 powers up but no trace

Discussion in 'Troubleshooting and Repair' started by The Noof, Apr 20, 2012.

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  1. The Noof

    The Noof

    Apr 20, 2012
    I bought an old 465 off of Ebay. It will power up but there is no trace. Nothing I do will produce one. I found a blown on the +15V unregulated PS. Any ideas what could be the problem?
  2. ModemHead


    Dec 2, 2010
    If you found a blown fuse on the +15V unreg, then check for a shorted HV oscillator transistor. It's a TO3-style attached to the corner of the back panel near the HV section.

    If that isn't it, then join the TekScopes group at yahoo. Those folks work on these things everyday and give good advice.
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