Question about Sony KP-46WT510 46" Rear Projection HDTV

7 Answers

No picture and 6 blinks

When the TV is turned on, there is no picture and the standby light blinks 6 times. On the service manual it states as an overload or short of the +5 line on the A,B boards. What do I need to replace?

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  • 3 more comments 
  • Jorge Craff
    Jorge Craff Nov 23, 2008

    Checked the boards and there are no connection problems.

  • Jorge Craff
    Jorge Craff Nov 23, 2008

    There are no connection problems - maybe a shorted IC? Please someone help me to check if there are bad ICs and how to replace them.

  • Jorge Craff
    Jorge Craff Nov 23, 2008

    The standby light blinks 6 times.

  • Jorge Craff
    Jorge Craff Nov 24, 2008

    How do I test them? I cannot find C515 or C516 - on what board would they be on - A board?

  • Jorge Craff
    Jorge Craff Dec 03, 2008

    Replaced A board but same problem.

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7 Answers

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  • Master
  • 899 Answers

You can get your service manual FREE here http://www.eserviceinfo.com/equipment_mfg/Sony_2.html
just scroll down to almost the bottom and all the way on the left hand side
so grab that then download the 10 part zip files , it says 46wt510 but when you open it here http://www.eserviceinfo.com/downloadsm/31612/Sony_KP-46WT520.html it shows you that it is for your model as well

electech

Posted on Nov 25, 2008

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  • Master
  • 6,966 Answers

Hi and welcome to FixYa,

Initially, your concern as you posted, the +5 is not being detected. This as you posted further could be the A,B boards. While this sound relatively simple, it could mean a variety of other things:

  • power supply failing to deliver the standby voltage, the +5, or even the 'DD 6V' Output (GM board );
  • other components/boards are clamping the +5
  • the G board is shutting down accompanied by arcing sounds.
This of course would require a fair familiarity of electronic components/circuitry and safety procedures, use of a DVM and a soldering iron. It would be to your added advantage access to a service manual or at the very least a schematic diagram with voltage readings (Sony KP-46WT510 RA6 chassis). Should you be uncomfortable performing a DIY (do-it-yourself), perhaps your best bet would then be to seek the services of a qualified professional.

Just a start, do postback how things turned up or should you need additional information. Good luck and Thank you for using FixYa.

Posted on Nov 23, 2008

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  • Sony Master
  • 586 Answers

Hi,
   When led blinks 6 times it means number of problems could be happend in it.And where the problem persists,This must be to define.So,+5  means that you have to check the path of +5 line.

There must be components which could be minor which is most probebly be the capacitors or Could be the Power ic.First check all the capacitors at +5 line.If not then must be the IC causing problem.

   Thanks

Posted on Nov 23, 2008

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  • Sony Master
  • 19,396 Answers

From the service manual : Six Blinks: No Horizontal, No Raster, Check C515, C516 & Jungle Ic206.

The component to be tested are on digital board.

This is the correct information , grab the diagrams on service manual and test the components.

Source (one of many) here.


Posted on Nov 23, 2008

  • Ginko
    Ginko Nov 25, 2008

    They are on D board, test also Jungle Ic206.

    To test ICs you dont check continuity, you need to take voltages out, this is not a repair for a neofite.

    Call a technician, that is the best choice, or buy the service manual if you want to do it yourself.

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  • Master
  • 449 Answers

Hi!!

check the board and the power supply
its maybe an overload

Posted on Nov 23, 2008

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  • Master
  • 1,952 Answers

The set has detected a problem internally and does not "start" to precvent further damage. I would check the horizontal output transistor for a shorted condition as this is the most common failure part. This is a 3-legged part attached to a heat sink close to the flyback transformer (part with red wire coming out of the top)

Posted on Nov 23, 2008

  • 2 more comments 
  • mohammed marika thambi
    mohammed marika thambi Nov 23, 2008

    The "D" board should be labeled. Look on the boards and you should see
    large letters. In the meantime, look closely at the solder
    connections and resolder any the appear grainy or have rings. That
    will eliminate any connection issues that could complicate the
    diagnosis process. Update this with anything you find. I'll look up
    your model and get you the specific parts that may be at fault.

  • mohammed marika thambi
    mohammed marika thambi Nov 23, 2008

    The different blink codes suggest that there are connection problems
    within the set and that you are seeing diferent problems each time.
    Can you solder? If so, resolder any connections you find that appear
    grainy or have rings

  • mohammed marika thambi
    mohammed marika thambi Nov 23, 2008

    have not been able to find a listing for your set from Sony. It may be
    a derivative set made specifically for one retailer and as such is only
    listed by its parent model. Be that as it may, if you have any
    experience withelectronics, I would first check the Hosrizontal Output
    Transistor for a short condition.

    Please count the number of blinks of the standby light. There should
    be a count from 1-10 or so then a pause, then the count again repeated.
    Post that here. This is the code from internal diagnostics and
    indicates the problem area

    This set may have a couple of problems. First, if you can solder, look
    for any connections on the CRT board (on the neck of the CRT) and the
    main board that look grainy or have rings and resolder them. Hopefully
    that will take care of the green problem. Next, try turning up the
    screen control on the flyback transformer. This should be the top
    control on the transformer. Turn it just a bit. If the flashing
    stops, then you have temporarily cured the problem. The picture tube
    is starting to fail. By turning up the screen control, you will have
    bought yourself time to find a replacement.

    Keep me posted on what you find.

    The most common cause of this is bad convergence ICs. These are large
    black ICs attached to a heatsink. They should be marked STKxxx. Try
    resoldering the pins on these first.


    installing a new lamp. If the lamp has failed, the set may do this.
    When the lamp hours have been exceeded, the indicator would be solid.
    The least expensive repair attempt at this point would be to replace
    the lamp.

  • mohammed marika thambi
    mohammed marika thambi Nov 24, 2008

    If you have sound, try turning up the screen control on the flyback
    transformer just a bit. See if the picture comes back. The flyback is
    the large part with the red wire coming out of the top.

    Update this with the results. , , , , , , , p

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  • Master
  • 1,550 Answers

LOW B OCP/OVP (Overcurrent/over voltage). Possible causes: +5 line is overloaded. (A, B boards), +5 line is shorted. (A, B boards).

You need to check the boards . And check whether the connections are proper (with proper soldering)

Posted on Nov 23, 2008

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