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cornboats
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 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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