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TROUBLESHOOTING USING LED AND OSD
1. Display
(1) OSD
Three kinds of error messages are displayed on the screen, and the power is turned off 10 sec later.
(2) LED
LED error is displayed continuously after the power is turned off.
2. Error types and check points
On screen display Cause Check point
ERROR MESSAGE CONDITION 1
Fan protector operated
Fan
Main power PCB
Main/Digital PCB
ERROR MESSAGE CONDITION 2 Temperature protector
operated
Ambient temperature of unit
Main/Digital PCB
Temp. sensor IC6950
(1) OSD
LED lamp display status Cause Check point
Steady light (Red)
Stand-by status
1 time (Red) / 1 time (Green)
Flashes once Red LED and flashes
once Green LED every 3 sec.
No power
Power supply protector
operated
Main power PCB
(2) LED
1 time (Red) / 2 times (Green)
Flashes once Red LED and flashes
twice Green LED every 4 sec.
No power
Power supply protector
operated
PDP panel
1 time (Red) / 3 times (Green)
Flashes once Red LED and flashes
three Green LED every 5 sec.
No power
Power supply protector
operated
Main/Digital PCB
2 times (Red) / 1 time (Green)
Flashes twice Red LED and flashes
once Green LED every 4 sec.
Temperature protector
operated
Ambient temperature of unit
2 times (Red) / 2 times (Green)
Flashes twice Red LED and flashes
twice Green LED every 5 sec.
Temperature protector
operated
Main/Digital PCB
Temp. sensor IC6950
3 times (Red) / 2 times (Green)
Flashes three Red LED and flashes
twice Green LED every 6 sec.
EEPROM device fault
Main/Digital PCB
Main/Digital PCB
3 times (Red) / 3 times (Green)
Flashes three Red LED and flashes
three Green LED every 7 sec.
EEPROM device Read /
Write fault
Main/Digital PCB
4 times (Red) / 1 time (Green)
Flashes four Red LED and flashes
once Green LED every 6 sec.
Main/Digital circuit fault
Main/Digital PCB
5 times (Red) / 1 time (Green)
Flashes five Red LED and flashes
once Green LED every 7 sec.
Video circuit fault
Video PCB
6 times (Red) / 1 time (Green)
Flashes six Red LED and flashes
once Green LED every 8 sec.
Fan protector operated
Fan 1
Main/Digital PCB
6 times (Red) / 2 time (Green)
Flashes six Red LED and flashes
twice Green LED every 10 sec.
Fan protector operated
Fan 2
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