Hitachi 28LD5200E Service Manual page 21

Picture is not displayed (LED is lighting)
Is the LED red or
green/orange
Is backlight lighting?
Is the voltage of
P802[5]pin on the Power
supply unit high?
Yes(high)
Is the voltage of
P804[1][2][3][4]pin on the
Power supply unit 16V?
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red
green/orange?
Yes
Is it the power
saving mode?
No
Input signal Cable
or Formatter PWB
Yes
No
No(low)
Power supply unit
Formatter PWB
Power supply
Yes
Inverter unit
28LD5200E (PW1L)
Is Voltage applied
to P804[1]pin of the Power
supply unit?
Yes
Is Voltage applied
to EJF1[3]pin of the
Joint PWB?
Yes
Formatter PWB
Is the voltage of
EFJ1[1]pin, EFJ2[1][2]pins applied
to of the Formatter
Yes
Is the voltage of
EFJ2[5][6][9][10]pins applied
to of the Formatter
Yes
or
Is the voltage of
No
EFP2[1][2]pins on the Formatter
PWB 12V?
Yes
unit
Formatter PWB
Panel Module
21
No
[1] +5V
Power supply
No
[3] +5V
Joint PWB
No
PWB?
EFJ1 EFJ2
Power supply
[1] +10V [1] +6V
[2] +6V
No
PWB?
EFJ2
Joint PWB
[5] +3.3V [9] +1.8V
[6] +3.3V [10] +1.8V
No
Power supply
or
unit
unit
unit