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Tektronix 475 scope

Discussion in 'Electronic Equipment' started by Andrej Nussdorfer, Dec 18, 2003.

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  1. Hi!

    I just have to keep nagging about the scope. Now I found out that two
    double transistors (Q914 and Q938) are badly overheating - they are
    actually too hot to touch (around 50C). The strange thing is that all
    the voltages around them are as specified in the schematic diagram. I
    am beginning to wonder if the temperature is normal (quite a strange
    thing since there are no heat sinks mounted on them). Any reply would
    be very appreciated!

    Thank you!

    Andrekj Nussdorfer
     
  2. Jim Yanik

    Jim Yanik Guest

    (Andrej Nussdorfer) wrote in
    First,don't trust the voltages on the schematics.
    Second,that hot temp is not normal.
     
  3. Boris Mohar

    Boris Mohar Guest

    Did you mean to say "not abnormal"
     
  4. Jim Yanik

    Jim Yanik Guest

    The parts should not be that hot.Something's wrong.
    Got a link to a 475 sweep schematic?
     
  5. Hi!

    Actually I do have a link! The schematic is
    http://www.fe.uni-lj.si/jade/dump/sweep_gen.eps. Unfortunately the
    schematic was quite badly scanned (low res) and is a pain to read
    (specially the part values and designators).

    Thank you again!

    Andrej Nussdorfer
     
  6. Tweetldee

    Tweetldee Guest

    Hi!

    Actually I do have a link! The schematic is
    http://www.fe.uni-lj.si/jade/dump/sweep_gen.eps. Unfortunately the
    schematic was quite badly scanned (low res) and is a pain to read
    (specially the part values and designators).

    Thank you again!

    Andrej Nussdorfer[/QUOTE]

    Download the full manual from http://bama.sbc.edu
    Be patient because that site has a limit of 10 simultaneous FTP connections,
    and there are lots of people trying to download from it. Best chance to get
    a connection is to hit it very late at night or very early in the morning.
    --
    Tweetldee
    Tweetldee at att dot net (Just subsitute the appropriate characters in the
    address)

    Never take a laxative and a sleeping pill at the same time!!
     
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