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Confidential
5G PDP Service Seminar
4. Trouble Shooting
5. Attention Point for Repair
6. Service Factory Mode
CONTENTS
4. TROUBLE SHOOTING AND DIAGNOSIS.............................................................. 3
4.1 LED LIGHTING PATTERN........................................................................... 3
4.2 BLOCK DIAGAM OF POWER DOWN SIGNAL SYSTEM ON PANEL..................... 5
4.3 BLOCK DIAGRAM OF SHUT DOWN SIGNAL SYSTEM ON PANEL...................... 7
4.4 BLOCK DIARAM OF SHUT DOWN SIGANL SYSTEM ON MR............................. 8
4.5 DEFECTIVE LOCATIONS ASSUMED FROM THE NUMBER OF LED FLASHING...... 9
4.6 SERVICING USING ONLY THE MEDIA RECEIVER........................................... 10
5 ATTENTION POINTS FOR REPIAR .................................................................... 11
5.1 BACKUP WHEN THE MAIN ASSY IS ADJUSTED.............................................. 11
5.2 POWER ON/OFF FUNCTION FOR THE LARGE-VOLTAGE SYSTEM..................... 14
5.3 METHOD FOR REPLACING THE SERVICE PANEL ASSY................................... 15
6 SERVICE FACTORY MODE AND RS-232C COMMAND.......................................... 16
6.1 SERVICE FACTORY MODE.......................................................................... 16
6.2 LIST OF RS-232C COMMANDS.................................................................... 30
6.3 OUTLINE OF GET COMMANDS................................................................... 33
MEMO
-2-
4 TROBLE SHOOTING
4.1
LED LIGHTING PATTERTN
Unit state LED lighting Pattern for MR LED lighting Pattern for Panel
Stand-by Lit in red
Power management
Power on Lit in green
Normal
STB with no MR Flashing in red
1s 1s
STB with no PDP Flashing in red
1s 1s
Misconnection of
system cable Flashing alternately in red and 1s 1s
*1 green ( at 1- sec intervals)
MR Shut Down Flashing in green X times (0.5 0.5 0.5s 0.5s 2.5s
sec intervals + 2.5sec
-3-
MR Power Down Flashing in red X times (0.5 MR
sec intervals + 2.5sec 0.5 0.5s 2.5s abnormal
MR Trap SW working Red and green on MR lit
PDP Shut Down Flashing in green X times (0.5 0.5 0.5 2.5s
sec intervals + 2.5sec
Panel
PDP Power Down Flashing in red X times (0.5
sec intervals + 2.5sec 0.5 2.5s abnormal
Backup data isn't copied Flashing in green X times (0.2 0.2s
to a new D.Video Assy sec ) and lit in red.
*1: At the same time, panel screen is displayed red / green alternately