 Posted: Fri Nov 08, 2013 10:23 am Post subject: LG50 PC1D |
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| I have trouble fault finding a fault on psu board YPSU-JO12B.
Changed shorted Q855 SD20N60 power fet Symptom-fuse keeps blowing. All other Power fets tested ok. removed Relays RL101 & R102 & tested ok removed C603 & c603 power capacitors and tested ok. removed diode D601 and tested ok. Last time I tested the thyristers TH01 blew up as well as flowing fuse. Any help would be welcome. |
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