Toshiba 55HT1U Inverters

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  • Ltank
    Badcaps Veteran
    • Jun 2013
    • 776
    • USA
    #1

    Toshiba 55HT1U Inverters

    Set had no backlight. Master #2 had Q7 P29048D shorted. Replaced it got 24vdc back. Main issue was the Slave #1&#2 boards jumper fried. I cut away the carbonized section of the. Jumper and jumpered the burned section but still no backlight. Does anyone have a schematic for the 19.54T01.005 and .007 boards?
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    • Ltank
      Badcaps Veteran
      • Jun 2013
      • 776
      • USA
      #2
      Re: Toshiba 55HT1U Inverters

      I have no Data Sheets on P4004ED Q12 &13 are tied to the Positive and Q14 &15 are P29048D tied to the Negative on P.S. My guess is 13/14 are turned on at different times than 14/15 . The Collectors or Drains are all tied to the three jumpers that fried. If the timing command from the Master #1 board has both turning on at same time this would short out the 24vdc to ground. Strange thing is the connectors on PS and cable/ coonectors into the inverters are fine.

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