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Equipment Repairs => PLASMA TV forum => Topic started by: Cornboats on December 03, 2013,04:44:00

Title: LG50 PC1 psu bad short keeps blowing fuse
Post by: Cornboats on December 03, 2013,04:44:00
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.