Hitachi 32LD7800TA Service Manual page 40

[ Power ]
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
P806[1]pin on the Power
supply unit high?
Yes(high)
>2V
Is the voltage of
P801,P802[1][2][3][4][5]pin on the
Power supply unit 24V?
Yes
Inverter unit
32LD7800TA (PW2L)
red
Yes
Input signal Cable
or Formatter PWB
Yes
No(low)
<2V
Joint
or
Formatter PWB
No
Power supply
unit
40
Is Voltage applied
to P804[1]pin of the Power
supply unit?
No
Is Voltage applied
to PJF1[7]pin of the
Joint PWB?
No
Formatter PWB
Is the voltage of
PFJ1[1]pin, PFJ2[1][2]pins applied
to of the Formatter
PWB?
Yes
PFJ1
[1] +10V
Is the voltage of
PFJ2[5][6][9][10][11]pins applied
to of the Formatter
PWB?
Yes
PFJ2
[5] +3.3V [9] +1.8V
[6] +3.3V [10] +1.8V
Is the voltage of
PFJ5[4][7]pins on the Formatter
PWB 12V?
Yes
Formatter PWB
or
Panel Module
Yes
[1] +5V
Power supply
unit
Yes
[7] +5V
Joint PWB
No
PFJ2
Power supply
[1] +6V
unit
[2] +6V
No
Joint PWB
[11] +1.8V
No
Power supply
unit