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28LD5200E (PW1L)
No(low)
No
red
green/orange
Yes(high)
Yes
No
Yes
Is the LED red or
Is backlight lighting?
green/orange?
Picture is not displayed (LED is lighting)
Is the voltage of
P802[5]pin on the Power
supply unit high?
Is the voltage of
EFP2[1][2]pins on the Formatter
PWB 12V?
Is the voltage of
P804[1][2][3][4]pin on the
Power supply unit 16V?
Is it the power
saving mode?
Input signal Cable
or Formatter PWB
Yes
No
Inverter unit
No
Yes
[1] +5V
[3] +5V
Is Voltage applied
to P804[1]pin of the Power
supply unit?
Is Voltage applied
to EJF1[3]pin of the
Joint PWB?
Power supply
unit
No
Yes
Joint PWB
Formatter PWB
Power supply
unit
Power supply unit
or
Formatter PWB
Power supply
unit
No
Yes
Formatter PWB
or
Panel Module
Is the voltage of
EFJ1[1]pin, EFJ2[1][2]pins applied
to of the Formatter
PWB?
EFJ1
[1] +10V
EFJ2
[1] +6V
[2] +6V
No
Yes
Power supply
unit
Is the voltage of
EFJ2[5][6][9][10]pins applied
to of the Formatter
PWB?
EFJ2
[5] +3.3V [9] +1.8V
[6] +3.3V [10] +1.8V
No
Yes
Joint PWB
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