LG LST-4200A Service Manual - Page 53
Circuit Diagram
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Circuit Diagram 1. POWER Circuit Diagram No Power BD101, R105 are Defective -30VA No Power D108 is Defective 12V No Power D125 is Defective No Power D102 is Defective No Digitron appeared D107, R123, ZD102 are Defective 3.3V No Power D105 is Defective 30VA No Power D110 is Defective Switching Error IC101 is Defective 5VA No Power D106 is Defective No Power F101 is Defective Switching Error IC102, IC103 is Defective 3-51 3-52
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3-51
3-52
Circuit Diagram
1. POWER Circuit Diagram
No Power
F101 is Defective
No Power
BD101, R105 are Defective
No Power
D102 is Defective
Switching Error
IC101 is Defective
Switching Error
IC102, IC103 is Defective
No Digitron appeared
D107, R123, ZD102 are Defective
-30VA No Power
D108 is Defective
30VA No Power
D110 is Defective
12V No Power
D125 is Defective
3.3V No Power
D105 is Defective
5VA No Power
D106 is Defective