Panasonic TC-L55WT50 Service Manual

Also see for Viera TC-L55WT50: Quick setup guide Owner's manual Manual de usuario

Panasonic TC-L55WT50 Service Manual Manual pdf 16 page image

167.2. Power LED Blinking timing chart1. SubjectInformation of LED Flashing timing chart.2. ContentsWhen an abnormality has occurred the unit, the protection circuit operates and reset to the stand by mode. At this time, thedefective block can be identified by the number of blinks of the Power LED on the front panel of the unit.7.3. LCD Panel test modePurpose:To find the possible failure point where in LCD Panel or Printed Circuit Board when the abnormal picture is displayed.How to Enter:While pressing [VOLUME ( - )] button of the main unit, press [OPTION] button of the remote control three times within 2seconds.How to Exit:Disconnect AC plug from wall outlet.How to confirm:If the abnormal picture is displayed, go into LCD Panel test mode to display the several test patterns.And then, judge by the following method.Still abnormal picture is displayed: The cause must be in LCD Panel.Normal picture is displayed: The cause must be in A board.Remarks:The test pattern is created by the circuit in LCD Panel.In LCD Panel test mode, this test pattern is displayed unaffected by signal processing for RF or input signal.If the normal picture is displayed, LCD Panel must be okay and the cause of failure must be in A board.Blinking Times Contents Check point1 BACK LIGHT SOS LCD PANELP-Board3 STM IROM BOOT PROGRAM SOS A-BoardP-Board7 SUB 3.3V SENSE SOS A-Board8 SOS (T-CON power) A-Board9 SOUND SOS A-BoardSpeaker10 ZWEI/FRC SOS A-Board12 BE SOS A-Board13 EMERGENCY SOS A-Board20 2nd BOOT PROGRAM SOS(Watchdog timer over flow)A-Board21 2nd BOOT PROGRAM SOS(System error)A-Board22 2nd BOOT PROGRAM SOS(Main system bus freeze)A-Board23 2nd BOOT PROGRAM SOS(Accidental interrupt signal)A-Board24 2nd BOOT PROGRAM SOS(NAND Flash memory data transfer error finish)A-Board25 2nd BOOT PROGRAM SOS(Unsupported NAND Flash memory)A-Board