Zenith P42W46X Service Manual - Page 17
No Raster - stand
UPC - 044642701499
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TROUBLE SHOOTING GUIDE 4. No Raster (1) Symptom ¯ Does't minute discharge at module. ¯ It maintains the condition where the front LED is green. (2) Check follow Is normal the Power No Board? Yes Is normal the each No connector? Yes Is normal the No Y- Board? Yes Is normal the No Z- Board? Yes Is normal the No X- Board? Yes Is normal the No Ctrl Board? Yes Is normal the No VSC Board? Yes Is normal the No COF of X, Y, Z? Is output the normality Low/High voltage except Stand-by 5V? No Replace Power Board. After connecting well each connector, No the normality it operates? Replace connector. Is normal the output Is normal the Fuse(F52) on Y-B/D? Yes voltage after remove Yes (In case of open is replace) P5, P6 connector of Y-B/D? Replace Y-Board. Is normal the output Is normal the Fuse(FS1, FS2) on Z- Yes voltage after remove Yes B/D? (In case of open is replace) P1 connector of Z-B/D? Replace Z-Board. Is normal the output voltage after Yes remove P1, 2, 3, 4, 6, 7 connector of X-B/D? After remove P1, P2, P3, P4 output voltage normality: Replace Right X-B/D After remove P6, P7 output voltage normality: Replace Left X-B/D Is normal the output voltage after Yes remove P1, 2, 101, 300, 701, 702 connector of Ctrl-B/D? Replace X-Board. Is normal the output voltage after Yes After remove P1000 normal operation: Replace Analog Board remove P1000, P1200? After remove P1200 normal operation: Replace Digital Board After crisis COF of each board, check the normality operates. If in case normality operates, correspondence COF Fail is replace the module. - 17 -