Question about Digi Channel Master/tal to Analog Converter/CM-7000

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My CM7000 has a red light on, and won't boot up

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Most likely bad capacitors in the power supply. I have fixed several including my own. See avsforum CECB thread for more info

Posted on Mar 26, 2011

  • Enu Bee Nov 06, 2011

    Which capacitor should I replace in the or all of them ?

  • Jim Hagen Nov 14, 2011

    On the power supply I would replace at a minimum:
    C14 - 4.7ufd 50v UPW1H4R7MDD
    C4 - 1ufd 50v UPW1H010MDD
    C8 - 100ufd 25v UHE1E101MED
    C10 - 470ufd 16v UHE1C471MPD
    C12 - 1000ufd 10v UHE1A102MPD

    There are 4 others in the supply that were not grossly bad.
    C1 - 22ufd 400v EEU-EE2G220
    C7 - 220ufd 25v UHE1E221MPD
    C11 - Same as C10
    C13 - Same as C10

    Logic board:
    E5 - 33uf 35v EEU-FM1A471
    E6 - Same as E5

    Part Numbers of replacement caps are Nichicon or Panasonic.

    Note: Caps on the logic board are extremely hard to replace due to the internal ground plane.

    Contact me if this is beyond your skills for possible repair.

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I have two CM7000's. Both stuck in RED light and failed to boot. After replacing C10 & C12 of the power supply with 470uF/25V capacitors on both units, the problem is fixed.

Posted on Jun 30, 2012

  • Ciera Olds
    Ciera Olds Aug 12, 2012

    Please note that it is best to replace these caps with higher voltage
    rating part (I used 470uF/25V). I found C10 and C12 are getting hot.
    Continuously working under hi-temp may be the cause of premature
    failure. The box started working after C10 and C12 replacement but the
    picture was very unstable. Occasionally the box still hang. I have to
    plug and unplug the power repeatedly to force the box to reboot. I have
    to replace C11, C13, E5 and E6.

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