Troubleshooting - Hitachi 42PD9800TA Service Manual

7. Troubleshooting

How to get to Burn-in mode
This mode displays the test patterns of some single color raster in turn. These signals are from built-in gener-
ator of panel. So it can be presumed that maybe the panel has some trouble when the screen of Burn-in
mode is abnormal.
Using the R-side control buttons with the set turned off (standby) can activate this mode.
Press the SUB-POWER( ) button and VOLUME DOWN(
than 5 seconds. (This operation is equal to select service Adjustment Menu No.407 and change data from 0
to 1.)
The set turns on with single color raster and the OSD of [BURN IN: ON].
To escape from this mode, press the SUB-POWER( ) button and
more than 5 seconds. Burn-in mode will be released.
How to check method of the use accumulation time for panel.
Select No.594 of Service Adjustment Menu.
Power [PWB Power]
Power cannot be turned on (LED does not light)
Is the input voltage
applied to Power supply unit ?
(CN61 (1),(3)）
Yes
Are the voltages
applied to CN63(1)pin,
CNPPS1(1)(7)pins, and CNPPS2
(1)(3)(5)(7)(9)pins of Power
supply unit ?
Yes
Check MAIN / SUB PWB
42PD9800TA (FW1)
) button at the same time, and hold for more
No
AC Fuse
F902 T6.3AH
No
[CN63] (1) +5V
[CNPPS1] (1) +5.4V / (7) +10.6V
[CNPPS2] (1) +33V / (3) +10.6V
(5) +5.4V / (7) +5V
(9) +3.3V
28
button at the same time, and hold for
FILTER PWB
Power supply unit
*Re-adjustment is reqired.
Plese refer to 'Power Unit
Vs Adjustment' page.