LC-37D43U Sharp LCD, No power No standby lights

[harrydun]

Re: LC-37D43U Sharp LCD, No power No standby lights

Hi to everyone in this forum. I am a newbie and I have same problem with my LC-42D69U Sharp LCD can some one help me to fix that.I know the model is not same.

[javiersuarezv]

Re: LC-37D43U Sharp LCD, No power No standby lights

hi. open a new threat

[trailmug]

Re: LC-37D43U Sharp LCD, No power No standby lights

Waking up an old thread here.. I had a repeat failure of the 1N5383. Looking at the datasheet for the TN264, the reference design is an RCD snubber. The zener lowers the part count and quiescent current, so perhaps that's why it was favored from a design perspective. The Delta board even has solder pads for the passive filter! I used the following:

R7917 and R7918: 200kOhm 1/8 watt
C7913: 2200pF 1kV Vishay Series F
D7907: delete, although you could probably leave it in as a fail-safe.

Maximum steady-state DC bias across the resistors (TV on) is about 80V steady state, so they're at about 25% of their rated power dissipation. So far so good!