LG CS767 5 free download

File name CS767_5.pdf

TROUBLESHOOTING GUIDE 1 . NO POWER NO POWER CHECK NO TROUBLE IN P901 OK? POWER CORD CHECK NO TROUBLE IN FUSE F901 FUSE OK? CHECK NO TROUBLE IN D901 (DCV)? D901 DCV = 140 336V TROUBLE IN CHECK NO IC901(STR6707) IC901 OK? R912, R913 CHECK NO TROUBLE IN Q901, Q902 Q901, Q902, D903 OK? CHECK CHECK TROUBLE IN NO SMPS TRANSFORMER SMPS SECONDARY Q905 SECONDARY OK? B+ LINE SHORT CIRCUIT NO TROUBLE IN TROUBLE IN PRIMARY OTHER Q904, Q905, Q909 COMPONENTS - 12 - 2. NO CHARACTER NO CHARACTER CHECK NO REFER SCREEN CONTROL NO RASTER CLOCKWISE CHECK TROUBLE IN NO IC301 PIN #4,6,9 R/G/B SIGNAL, SIGNAL LEVEL SIGNAL CABLE TROUBLE IN CHECK IC301 NO IC301 PIN #17,20,26 CLAMP (PIN 14) SIGNAL LEVEL IC301 12V VOLTAGE CHECK NO TROUBLE IN IC302 PIN #3,4,10 Q308, Q309, Q310, Q311, SIGNAL D310, D311, D312 CHECK NO TROUBLE IN CATHODE VIDEO PERIPHERAL CIRCUIT LEVEL OF CRT PWB TROUBLE IN CONNECTOR ASS'Y (MAIN P702 & P703-VIDEO P302) - 13 - 3. NO RASTER NO RASTER CHECK NO VOLTAGE(CRT TROUBLE IN HEATER) 6.3V 6.3V LINE CHECK NO