Hitachi 28LD5200E Service Manual page 21

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