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Sony 27" T.V.

Discussion in 'Electronic Repair' started by Dani, Aug 1, 2006.

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  1. Dani

    Dani Guest

    Two units same situation. KV-27EXR25, KV-27EXR15, dead, IC 651 STRS6301
    shorted, checked D623 Q604, & surrounding circuitry, & 2sd1886
    horizontal output
    shorted, repaired, solder horizontal section, checked drive cap, but
    comes on with
    high voltage just for a split second, & shuts down with about 125 volts
    DC out of
    the power supply at about 75 volts AC in with B+ at the flyback
    unhooked. I can't
    see anything gone in the power supply. Am I missing something here?
    Thanks, Dani.
     
  2. Dani

    Dani Guest

    To ad to the previous post, got the KV-27EXR15 working, now it's not
    quite wide enough on the right side & has bad linearity on that side
    from
    top to bottom. The horiz output gets quite hot also. I'm thinking
    flyback,
    but can't find the proper # to use. The # on IHVT is 1-439-423-21...no
    listing by that number at Tritronics, & the site says it's 1-439-416-21

    looking it up by model #, & it's NLA, 1-439-416-61 is supposed to be
    the right one. I have a 1-439-416-41, but I'm unsure if I can use it.
    Also
    can't find a service manual, or data on these units, & I have lots of
    Sony
    manuals, & info. Dani.
     
  3. Sofie

    Sofie Guest

    Dani:
    I have found that the 2sc4927, which is the original HOT in many large CRT
    Sonys.... will run COOLER than most other types and replacements.... if you
    can't obtain that, then a 2sd1880 is a good, cool running, replacement.
    You will also find that the width and linearity problems will usually go
    away when these part numbers are used.
    Best Regards,
    Daniel Sofie
    Electronics Supply & Repair
    - - - - - - - -


    snipped:.
     
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