Question about Sony FD Trinitron WEGA KV-27FS100 27" TV

2 Answers

Kv27fS100 - LED BLINKS 15/16 TIMES FIRST AND THEN 2 TIMES CONTINUOUSLY

Hello everyone

My Trinitron doesn't start. After I turn power on, LED blinks 15/16 times and then it blinks twice .. Any ideas as to where can i start troubleshooting this?

Thanks,
BG

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  • k29ska9 Jun 27, 2008

    Hi Dan



    Thanks for the insight. I am new to TV troubleshooting but i don't mind challenges.



    I was planning to open up TV. I read on several another forums that D board - very expensive part - is where problems are seen. Is this o/p transistor on that board? Any pointers as to which board / location of transistor that i need to check. Also what tools do i need to check - which indicates i would need help with how to check.



    Thanks for your patience and help.



    regards,

    BG

  • k29ska9 Jun 27, 2008

    Finally found a service manual. It says to check following:
    H.OUT (Q502) is shorted. (A Board)
    IC702 is shorted. (C Board)

    I was able to locate IC702 on C board but Q502 looks ugly. How do i check IC702 for a short? Do i need a multimeter or do I need something else?

  • k29ska9 Jun 27, 2008

    Finally found a service manual. It says to check following:
    H.OUT (Q502) is shorted. (A Board)
    IC702 is shorted. (C Board)

    I was able to locate IC702 on C board but Q502 looks ugly. How do i check IC702 for a short? I think i need multimeter. Is that correct or do I need something else?

×

2 Answers

Same model TV and SAME problem - 2 blinks. After reviewing the service manual, here is what ive come up with:
2 parts listed as defective.
Q502 on the A Board. (a transistor, part# 2SD2634 online for $2.39)
IC702 on the C Board. (integrated circuit, part # TDA6108JF online for $3.29)
Both Parts - www.acme-sales.net
Service Manual - Free Download ( you have to download all four parts before extracting - http://www.eserviceinfo.com/downloadsm/27543/Sony_KV-27FS100,%20KV-27FS200,%20KV-29FS100.html
Has anyone tried replacing one or both of these parts and if so how did it turn out?

Posted on Jul 29, 2008

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The initial blinking is normal. The two blinks are the key and indicate an over current condition detected. This can be a problem in any of the circuits. Since the set initially performs as expected and the blinks show up after a little while suggests that the problem is in the high voltage circuit. If you are comfortable working inside the set, check the horizontal output transistor for a shorted condition. That is the most common failure. If you must see a servicer, expect a parts cost in the $25 range. Add in the local labor rate for the total repair cost.

Dan

Posted on Jun 27, 2008

  • ABRsvcs Jun 27, 2008

    I don't have the service manual right on front of me at the moment, so I'm doing this from memory and experience. I'll look up the model and post more details. Stay tuned...



    Dan

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