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Service Manual: PTX8500 UHD
4. Troubleshooting
Defect
Code
Symptom
Checking
Actions
R500
No Power
1.Check AC power source, power cord and AC switch.
2.Check PSU
3.Check normal booting.(Refer to page24-Q2)
If PSU abnormal then swap PSU
else Swap AD board.
D33
Power on no display
1.Check PSU
2.Check normal booting.(Refer to page 24-Q2)
3.Check Video source and video cable.
4.Check normal screen.(Test mode, Refer to Page 25-Q3)
Swap PSU
Swap AD board
Swap LCM
D34
Power on no signal
1.Check normal booting.(Refer to page 24-Q2)
2.Check Video source and video cable.
3.Check normal screen.(Test mode, Refer to Page 25-Q3)
Reset to factory default. (Refer to Page23-Q1)
Swap AD board
D30
Power on display
abnormal
1. Check normal booting.(Refer to page 24-Q2)
2. Check Video source and video cable.
3. Check normal screen.(Test mode, Refer to Page 25-Q3)
Reset to factory default. (Refer to Page23-Q1)
Swap AD board
Swap LCM
R501
Turn off abnormal
1. Check OSD key lock function.
2. RCU defect or no battery.
3. OSD Keypad defect.
Reset to factory default. (Refer to Page23-Q1)
swap AD board
Swap keypad
R502
Power saving abnormal
1. Check video source and unplug all video cable.
Reset to factory default. (Refer
to Page23-Q1) Swap AD Board
D20
Display shift
1. Check video source and unplug all video cable.
2. Plug the video cable again.
Auto tune
Reset to factory default. (Refer to Page23-Q1)
D17
Press panel waving
1. Check LVDS wire connection.
2. Check normal screen.(Test mode, Refer to Page 25-Q3)
Reset to factory default. (Refer to Page23-Q1)
swap LVDS wire
Swap AD Board
Swap PSU
Swap LCM
D500
Display noise
1. Check video source and video cable.
2. Check LVDS wire connection.
3. Check normal screen.(Test mode, Refer to Page 25-Q3)
Reset to factory default. (Refer to Page23-Q1)
Swap LVDS wire
Swap AD Board
Swap PSU
Swap LCM
D37
Display flicker
1. Check LVDS wire connection.
Reset to factory default
Swap LVDS wire
Swap AD Board
Swap PSU
Swap LCM
D06
R.G.B. display
abnormal
1. Check video cable.
2. Reset to factory default
3. Check LVDS wire connection.
Swap LVDS
Swap AD Board
Swap LCM
D501
Gray scale display
abnormal
1. Check LVDS wire connection.
Reset to factory default
Swap LVDS
Swap AD Board
Swap LCM
D15
Vertical weak line
1. Check LVDS wire connection.
Swap LVDS
Swap AD Board Swap LCM
D502
Vertical band defect
LCM replace
D503
Horizontal band defect
LCM replace
D37
Beat display flicker or
shut down
1. Check video source and cable connection.
2. Check all wire
Swap wire
Swap AD Board
Swap PSU
D17
Display wave
1. Check video source and cable connection.
Swap PSU
Swap AD Board
Swap LCM
D16
Display shake
1. Check video source and cable connection.
Swap PSU
Swap AD Board
Swap LCM
E11
Polarizer Scratch
LCM replace
E14
LCM broken
LCM replace
D19
Display Mura
LCM replace
Summary of Contents for PTX-8500 UHD
Page 1: ...Page 1 21 Service Manual PTX8500 UHD Legamaster Service Manual Model No PTX 8500 UHD ...
Page 6: ...Page 6 21 Service Manual PTX8500 UHD 2 1 3 Remove the Bezel 2 1 4 Panel BKT 24 screws ...
Page 8: ...Page 8 21 Service Manual PTX8500 UHD 3 Parts descriptions 3 1 Module E ...
Page 10: ...Page 10 21 Service Manual PTX8500 UHD 3 2 Wiring 3 2 1 Wiring for PCBA ...
Page 11: ...Page 11 21 Service Manual PTX8500 UHD OPS Dockingboard ...
Page 15: ...Page 15 21 Service Manual PTX8500 UHD 4 1 Check PSU Functions 4 1 1 11012413061 AA ...