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vestel 11ak30 standby problem

 
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mahmoudesm
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PostPosted: Fri Jan 07, 2011 8:55 pm    Post subject: vestel 11ak30 standby problem Reply with quote

i have vestel tv chasis 11ak30 ,it has processor st92195c3b1,and stv2246h .The problem is Standby state.power led is red .Bu808 is ok ,6n80 power suply mosfet is ok.i replaced st92195 .when i open pin 47 of syscon IC TV turn on what are other possibilties.... any one to guide me .thanks in advance.
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PostPosted: Sat Jan 08, 2011 4:44 pm    Post subject: Reply with quote

Does the LED stay solid red when you attempt to turn it on, or does it start flickering?

Try:

Check D800 - BA159 for short circuit
Replace D806 (it may read ok)
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PostPosted: Sat Jan 08, 2011 4:51 pm    Post subject: Reply with quote

Oh, and eeprom 24C08 may be the problem. Might need reprogramming or replacing.
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mahmoudesm



Joined: 08 Jan 2011
Posts: 2

PostPosted: Sun Jan 09, 2011 7:32 am    Post subject: Reply with quote

hi,thanks,i try chek it and go back,
yes led is flickering and i hear a sound like that chik..chik .chik!
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PostPosted: Sun Jan 09, 2011 4:41 pm    Post subject: Reply with quote

Another thing to check on 12V line is:

D810 (UF5402) in the PSU might be short-circuit.
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mahmoudesm



Joined: 08 Jan 2011
Posts: 2

PostPosted: Sun Jan 09, 2011 7:05 pm    Post subject: Reply with quote

I replaced D800,D806,optocopler: IC 801,C623 :33mf/160v,C826: 47mf/160v,c822,c856,c812 but TV is in standby stat still.
when I conect R118 to ground TV turn on and power led stay green.
also voltage of Drain pin of Mosfet Q801 is unstable (27v...110v).
Voltage of D808(Katod pin) is 11.5v.
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PostPosted: Tue Jan 11, 2011 8:21 pm    Post subject: Reply with quote

i found problem.i replaced C827: 4700uf/16V .
this cpacitor was not short-cicuit but it was leaked.
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PostPosted: Fri Jan 14, 2011 3:37 pm    Post subject: Reply with quote

mahmoudesm wrote:
I replaced D800,D806,optocopler: IC 801,C623 :33mf/160v,C826: 47mf/160v,c822,c856,c812 but TV is in standby stat still.
when I conect R118 to ground TV turn on and power led stay green.
also voltage of Drain pin of Mosfet Q801 is unstable (27v...110v).
Voltage of D808(Katod pin) is 11.5v.

hello.
C613=10UF -50V near horizantal driver must replce.
zamani
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