Sanyo P50842-00 Troubleshooting Manual

Contents

Repair Flow Chart:Trouble ConditionGreen Power LED and LCD backlights is ON, but no video or OSD.LCD backlight is ON,but TV has NO VIDEO or OSD.For analog board:Is the 12V supplied from “K8B Pin 6/7”?For digital board:Is power 12V supllied from “K5A Pin5”?Replace“Power board” and“Wire harness”.For digital board:Is power 12V to TCON suppliedfrom“K7200 Pin1/2/3/4” ?Analog board can not work.Replace “analog board”.Is FFC singal working?(see TABLE*1.0)Confirm FFC cable connectionand then check video or OSD again.T.Cnt.Board or LCD panel can not work.1st:Replace“T.Cnt.Board&FFC Cable”.If T.Cnt.board&FFC cable has noproblem, then 2nd:Replace“LCD Panel”.Digital board can not work.Replace “digital board”.Digit board can not work.Replace “digital board”.If FFC singal output is OK, the digital board isnormally OK, but can not be sure. Ifthe T Cont Board & FFC has no problem,please try the digital Board before changingthe panel.Page 3(TABLE*1.0)Main board:"FFC Clock"Test Points50" Models LVDS Clock on digital boardP50842-00 Z6WEP50842M-00 Z6WEMP50842-01 Z6WFP50842M-01 Z6WFMK7200 Pin32 clock+K7200 Pin33 clock-Note:The bandwidth of the oscilloscope and probe must be at least 100MHZ or higher to check if the clock pulse exists.