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wavetek waveform generator model 75 no response :-(((

Discussion in 'Electronic Repair' started by David O'Dell, Jun 3, 2013.

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  1. David O'Dell

    David O'Dell Guest

    Hey all,

    Thanks in advance for any help on this. I'm a high school physics teacher and I came across this device in a surplus warehouse and I'm hoping to get it working if possible. It is a wavetek brand waveform generator model 75.

    the device turns on but the LED display panel is all black blocks and no digits. I've read the manual and tried the reset procedure of hitting setup 3 times, then f2 and then f3 but there is no response even during this process. I have measured the signal from all of the outputs and no response.. I really hope this is a common problem and is fixable, this would be a very meaningful device for my students in our classroom.



    has anyone had experience with this problem on this or a similar device before?

    thanks!

    dave
     
  2. Jamie

    Jamie Guest

    There don't seem to be a service manual up front, I didn't fully look

    But what you describe sounds like bad caps, electrolytic types. Most
    likely from sitting around and one in a critical area dried out.

    Also, that unit could have a lithium cell in it for memory, some times
    they get bad enough to where they hold down the start up process of a
    diode isn't being used to isolate it.

    I would take it apart and look it over..

    Jamie
     
  3. Guest

    Do you have access to a voltmeter and an oscilloscope? I would
    contact the manufacturer and explain to them that you are a teacher
    and need some help in fixing one of their products for use in high
    school classes and see what they offer to do. Tell them even a
    schematic would help, but only if they don't seem very helpful.
     
  4. N_Cook

    N_Cook Guest

    Hey all,

    Thanks in advance for any help on this. I'm a high school physics teacher
    and I came across this device in a surplus warehouse and I'm hoping to get
    it working if possible. It is a wavetek brand waveform generator model 75.

    the device turns on but the LED display panel is all black blocks and no
    digits. I've read the manual and tried the reset procedure of hitting setup
    3 times, then f2 and then f3 but there is no response even during this
    process. I have measured the signal from all of the outputs and no
    response.. I really hope this is a common problem and is fixable, this
    would be a very meaningful device for my students in our classroom.



    has anyone had experience with this problem on this or a similar device
    before?

    thanks!

    dave

    +++++

    My only Wavetek generator , of that era, repair experience, was a shorted
    22uF tantalum on a power rail and so a "dead" machine
     
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