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TEK 475 scope STOPPED

Discussion in 'Electronic Repair' started by Dave_s, Mar 28, 2005.

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  1. Dave_s

    Dave_s Guest

    Hi Hugh,

    My favorite old TEK 475 Scope has suddenly stopped working.
    Symptoms are:
    No trace, screen is blank, intensity and focus control do
    Beam Finder shows a dim small circle middle of screen.
    When power is turned off, circle like BEAM FINDER same size is
    and bright for a breif moment.
    Panel LEDS are lighted and do respond to switches being changed.
    Screen graticule cannot be seen.

    Any suggestions are welcome. I currently do not have an adequate
    service manual, only OPERATORS MANUAL and just module layout and parts
    list. I am looking but cannot find the TEKTRONIX scope forum. Lacking a
    schematic is really flying blind.
    Will find cost of a complete SERVICE MANUAL.

    I've really not had good luck with USED scopes lasting for years. Have
    not had this scope very long. But it worked well while I had it. At the
    moment, I'm up to arm pits in many tasks so starting scope servicing is
    not what I wanted to start. My OLD antqiue TEK scope is still wroking
    which is a life saver.

    MAybe I'll get lucky and find a blown fuse??????????????

    73, W6MIK, dave
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