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Sony KV-27XBR55 Repair

Discussion in 'Electronic Repair' started by DIY Repair, Jan 30, 2006.

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  1. DIY Repair

    DIY Repair Guest

    Hi,

    I've a Sony KV-27XBR55 and it suddenly has no picture.

    Symptoms:

    - no picture
    - no OSD (on screen display) (the green colored text does not show)
    - great sound
    - tube seems to have static
    - the back / neck of tube glows orange

    I would appreciate it, If anyone can provide me of hints on how to go
    about repairing it.

    Anyone have the service manual/repair guide or schematics for this Sony
    model (or similar model)?

    Thanks in advance.
     
  2. sofie

    sofie Guest

    DIY Repair:
    You should go to the website for this newsgroup at
    http://www.repairfaq.org/
    there, with some of your search time, you will find a wealth of television
    troubleshooting tips, repair procedures and important safety information.
    Read through the repairfaq, perform some basic troubleshooting, testing,
    meter readings, component tests, etc...
    --
    Best Regards,
    Daniel Sofie
    Electronics Supply & Repair
    - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

    ,
     
  3. Guest

    Google sci.electronics.repair for "sony video" sony blank video" "Sony
    no picture" tons of hits on how to troubleshoot.

    Barring that, you need a little more information as there are at least
    4 common causes for your symptom and approximately 10 uncommon causes.


    I would mark the G2 control and write down the voltage read on G2 and
    then slowly turn it up to see if anything becomes visible. That alone
    will tell a lot about the problem. Do not run the set in the fault
    condition with the G2 turned up, some causes for the loss of video can
    crack the picture tube if left with the G2 cranked up.
     
  4. Guest

    Google sci.electronics.repair for lots of prior postings of similar
    problems and how to troubleshoot each one. At this point there are a
    lot of different possibilities, need more input. Before adjusting
    anything (hint) mark it with a black permanent marker so you can know
    exactly where you started. I would start by measuring the G2/screen
    voltage and write it down, mark the screen control, then slowly turn it
    up to see if anything were visible on screen, then turn it back down to
    exact origional position.

    i.e. "Sony video" Sony blank video" etc
     
  5. DIY Repair

    DIY Repair Guest

    Would anyone happen to have the PDF schematics / service manual for
    this TV?

    Someone mentioned that their was a website that provided free versions,
    but I haven't been able to locate them.
     
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