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power supply problem on lcd LG1510M

March 2 2006 at 3:58 AM
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verdelli  (Login verdelli)

When power supply is connected with central unit
led is off,if is disconnected power voltage is
6.33 and 11.5
if i misure with multimeter voltage on zener diode on primary section betwin + 300 v and catode of diode,
voltage is ok 5v and 12v.
resistor are ok i'have changed zener diode but like.
if i can misure on secondary with nultimeter,on opto,tension go at normal value,but i disconnected and riconnected power supply.....tension returned at 6.33 and 11.5 v
if i put in short circuit out pin of opto...tension is ok.
i have replaced electrolitic too...but nothing.


thank you

verdelli Italy

 
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