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