Cornboats
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Nov 8, 2013, 11:18 AM
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LG50 PC1D- PSU fault
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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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