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Hitachi 50ux22ba/23ka will not power up

 
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driving song



Joined: 20 Sep 2007
Posts: 2
Location: ilm

PostPosted: Thu Sep 20, 2007 8:33 pm    Post subject: Hitachi 50ux22ba/23ka will not power up Reply with quote

All 6 LED's light up when I hit the power button then all but one turn off after a sec. The one labeled D903 or D975(can't tell which number corresponds w/ it but it's also labeled "protection" w/ an arow pointing to it) remains on. Any suggestions as what to check for? thanks in advance.



btw: While researching I saw that similiar models with a similiar problem were fixed by replacing C707 and E994 but I don't see those on mine at least not in the same spot.
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cory
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PostPosted: Thu Sep 20, 2007 10:02 pm    Post subject: Reply with quote

if this set has them you wil find c707 just in front of flyback,under glue and between 3 large capacitors.and e994,2a fuse on secondary of power supply.if fuse is open i believe the one led will not light.also check for burnt resistors next to convergence ics.if so replace open resistors and ics.
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driving song



Joined: 20 Sep 2007
Posts: 2
Location: ilm

PostPosted: Fri Sep 21, 2007 8:11 pm    Post subject: Reply with quote

thanks for your input. After DLing the service manual it appears my set does not have the C707 or E994. All fuses seem to be good so at this point I think I'm in over my head. Thanks again.
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cory
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PostPosted: Sat Sep 22, 2007 3:22 pm    Post subject: Reply with quote

did you look for burnt resistors near convergence ics.you can visually see them.1.5,1.8,2.7 ohm.
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