sharp LC 39LD145V vestel 17IPS20S

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  • NyNex
    New Member
    • Jul 2012
    • 6
    • Croatia
    #1

    sharp LC 39LD145V vestel 17IPS20S

    Hy

    I have a problem whit vestel PSU, no stand by (led on front not working), all is dead. The tv is completely dead , no lights at all, i have checked the all the diodes, they are all ok, all fuses are ok, i have changed Q216, U200 and U301 no luck. In image "frontMes" i have marked voltages on primary side, on main caps voltage is 315V, i don't have VCC, but i have VCC_main 12V. Any advice?
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    • NyNex
      New Member
      • Jul 2012
      • 6
      • Croatia
      #2
      Re: sharp LC 39LD145V vestel 17IPS20S

      Smal update, VCC_Main 12V no VCC, U202 pin 8 120V, no power on U101, on U101 pin 1-3 36,5 kOHM.

      U101 - FAN 7529
      U202 - Te5an 6300a myc
      U300 - 1380D

      no power on secondary side, no 12V no 24V, no back light, power on main caps is 315V, seams PFC is not working.

      On TR200 no voltage on secondary.

      Diodes 209,210,211 ok (desoldered testing), when soldered back meter on diode test when red probe on Cathode and black on Anode voltage is slowly groving, reversed 0,265V.

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