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Matsui 32WN03 SIL PSU fault

Discussion in 'TVs' started by Fallon, Jul 6, 2005.

  1. Fallon

    Fallon
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    Hey there all.

    I've been lumped with a Matsui 32" 32WN03 SIL Nicam TV.

    When powering up, you can hear the capacitors charging, the light comes on for a second followed by the thump of sudden discharge.

    I have the circuit diagram but, it's barely related to what is actually on the main board (lots of bits missing/linked over/etc...)

    Testing various points, it seems I have 130VAC running through most of the board. (Odd when there's supposed to be 28V there.)

    I suspect a simple open circuit but finding it is another matter.

    Does anyone know of a source of a servicing manual for this chassis? I've hunted high and low but, to little avail.

    All help and remedy suggestions would be much appreciated.

    Thanks.
     
  2. JayCee

    JayCee
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    My suggestion is that you put it together and call out an experienced TV technician as obviously you do not have a clue what you're doing :lesson:
     
  3. wynne

    wynne
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    Has anybody worked on this model, found the line output transistor short across b, e, c, S2000AF1 changed it for a new one and went in a couple of seconds.
    With the transistor removed and a 60watt bulb conceded between E and C the power supply works ok, checked all the board for dry joints.

    Had problem with this set a year ago the ICF1 had gone short and burned out the feed resistor, the chassis for this set is pro4400 bush I think.
    I think the line output transformer has gone short but can’t find one anywhere.

    Thanks in advance wynne
     

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