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Schematic manual for a Fluke 6070A sig gen

Discussion in 'Electronic Repair' started by Grumps, Oct 15, 2007.

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  1. Grumps

    Grumps Guest

    Hi All
    As per subject really. I have the user manual and service manual, but I need
    the schematics to debug a start-up issue.
    This unit has been out of support for 12 years. But it is (well, it was!) a
    damn good unit.
  2. DaveM

    DaveM Guest

    You can buy a copy of the schematics manual for this unit from:

    It ain't cheap!!!

    Dave M
    MasonDG44 at comcast dot net (Just substitute the appropriate characters in the

    "In theory, there isn't any difference between theory and practice. In
    practice, there is." - Yogi Berra
  3. Grumps

    Grumps Guest

    Thanks for the link. It's only $60. And if that keeps it going for years to
    come, it'll be worth it. A 500MHz sig gen of this spec costs much more than

    The unit has started working again after taking it apart and re-seating a
    few cables. Fingers crossed.
  4. You might look over the front panel IC's. I seem to remember one
    important IC tended to work loose due to the heat sink tab under it.
  5. Grumps

    Grumps Guest


    I had the front panel apart and re-seated all of those ICs too.
    I did notice one sitting on a metal tab. Looked a bit of a bodge to me. And
    the IC didn't have a good contact with the tab, nor had an exposed metal

    There are two axial electrolytics on one board. Very gentle pressure on the
    pcb actually causes one of them to touch another smaller board (which is
    mostly ground). I don't think that was the problem, but I've trimmed its
    leads so that won't happen again.

    The first problem I had with this unit (about two years ago) was that it
    would only start in certain orientations. This turned out to be caused by
    the oven oscillator not starting up. I had to disassemble this, and found
    that the power wire was wrapped around its pin, but had never actually been
    soldered. It just rested like that for 15 years!
  6. Yep this is a very complicated signal generator. One weak area is the
    "noise reduction loop". Hundreds of parts, scads of exotic parts,
    dozens of critical adjustments, about half of them not documented in
    any of the manuals. You were supposed to send the unit to Fluke for
    those adjustments. If you have a working unit, lucky you.
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