LG CS480 5 free download

File name CS480_5.pdf

TROUBLE SHOOTING GUIDE BASIC GUIDE CHECK FOLLOW NO SMPS SECOND NO POWER B+ OUTPUT PROCEDURE YES CHECK HORIZONTAL NO FOLLOW OUTPUT NO RASTER WAVEFORM PROCEDURE YES FOLLOW CHECK NO NO VERTICAL VERTICAL OUTPUT DEFLECTION WAVEFORM PROCEDURE YES CHECK FOLLOW VIDEO OUTPUT NO NO CHARACTER, WAVEFORM NO CONTRAST PROCEDURE YES FOLLOW OTHER PROCEDURES - 14 - 1. NO POWER NO POWER CHECK C908 NO TROUBLE IN DC VOLTAGE? F901, R901, D901, D902 DC=MORE THAN 130V YES CHECK TROUBLE IN NO CHECK NO T901 Q901, Q902, IC901,R904, PIN 3 ? IC901 R905, R912, D906, D907 YES YES TROUBLE IN D909, R916 CHECK TROUBLE IN SMPS SECOND NO D931~D933, D936, D937 DC VOLTAGE ? OR THEIR CONNECTED COMPONENTS 6.3V, 11.5V, 39V, 65V, 77V YES CHECK NO TROUBLE IN IC931 PIN 3 IC931 CIRCUIT VOLTAGE (5V)? YES TROUBLE IN OTHER PRIMARY CIRCUIT - 15 - 2. NO CHARACTER NO CHARACTER CHECK NO TROUBLE IN IC301 PIN 8 (8V)? IC302 11.5V LINE YES CHECK NO TROUBLE IN IC301 PIN 2, 4, 6 ? PC SIGNAL, C301, C302, C303