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Sony 32" dead again.

Discussion in 'Electronic Repair' started by Dani, Jan 12, 2006.

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  1. Dani

    Dani Guest

    KV-32S40 dead, replaced horiz output, MX regulator IC, & resistor. VDR
    on separate power supply board measured open...should be ok, & I never
    had that type VDR in stock, used the
    variac, slowly up to 120 vac, after 30 secs...gently blew the parts
    again. Replaced horiz drive
    cap. Pix was perfect. Did I miss anything? Should I replace the VRD,
    even though it measured open circuit? Thanks.
     
  2. Do Little2

    Do Little2 Guest

    A variac is of no help in this Sony circuit. As a test, next time, use
    a 100 Watt light bulb in series with the 120 VAC. If the set is in
    working condition than it will -try- to startup. If there is another
    -major- problem the 100 Watt bulb just lights up bright and there
    is no further damage done.

    Good Luck
     
  3. Cracked solder connections on T501 Horizontal Base drive tranny is typically
    what causes the failure.

    If you did NOT resolder it....this is what caused the domino effect failure!

    Look at the pins with a magnifying loop...you will see!

    Resolder this transformer on ANY TV you repair.


    --
    ==========================
    Jeff Stielau
    Shoreline Electronics Repair
    344 East Main Street
    Clinton,CT 06413
    860-399-1861
    860-664-3535 (fax)

    ========================
     
  4. kip

    kip Guest

    That's because you never fixed the problem
    that caused those components to blow in the first place.
     
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