HITACHI 42PD8800TA SERVICE MODE AND TROUBLESHOOTING
HITACHI 42PD8800TA PLASMA DISPLAY
SERVICE MODE AND TROUBLESHOOTING
SERVICE MODE
Using the front control buttons with the set turned off (standby) can activate it.
Press the SUB-POWER button, INPUT SELECT button and DOWN ARROW button at
the same time, and hold for more than 5 seconds.Using the front control buttons with the set turned off (standby) can activate it.
The set turns on in adjustment mode with OSD.
# Changing data and Selecting Adjustment code When the set is in adjustment mode, the cursor LETT, RIGHT, UP, DOWN and OK buttons of the remote control or front panel may be used as the adjustment keys.
UP, DOWN buttons are used for selecting adjustment code.
LETT, RIGHT buttons are used for changing data values.
OK button is used for confirming the data.
After finishing the necessary adjustment press MENU button. Adjustment mode is released and the set returns to normal condition.
# Memory Initialize operation
NOTE: The execution of this function returns the adjustment codes to the preset values, therefore, adjustment data will be lost.
Procedure
(1) Enter Adjustment Mode.
(2) Select MEMORY INIT adjustment code (No.818) and change the data value from 0 to 1.
(3) Activate MEMORY INIT by pressing OK button.
(4) Select No.712 and change data value from 1 to 0.
(5) Check that the receiving channel goes to P1. Unit is set to preset values.
(1) Enter Adjustment Mode.
(2) Select MEMORY INIT adjustment code (No.818) and change the data value from 0 to 1.
(3) Activate MEMORY INIT by pressing OK button.
(4) Select No.712 and change data value from 1 to 0.
(5) Check that the receiving channel goes to P1. Unit is set to preset values.
Factory Reset
After all of the adjustments of main chassis are finished, perform FACTORY RESET.
Press the SUB-POWER button, INPUT SELECT button and DOWN ARROW button at the same time, and hold for more than 5 seconds. The unit is set to factory settings.
After all of the adjustments of main chassis are finished, perform FACTORY RESET.
Press the SUB-POWER button, INPUT SELECT button and DOWN ARROW button at the same time, and hold for more than 5 seconds. The unit is set to factory settings.
Power Unit Vs, Va Adjustment
1) Turn Vs ADJ to adjust Vs voltage to be
within ±0.1V of the value specified in the label on the panel.
Adjust within ± 1V at Vs1
Adjust within ± 0.1V at Vs2
2) Turn Va ADJ to adjust Va voltage to be within
±0.2V of the value specified in the label on the panel.
Adjust within ± 1V at Va1
Adjust within ± 0.2V at Va2
Adjust within ± 1V at Va1
Adjust within ± 0.2V at Va2
3) Reconfirm that Vs voltage remains within
±0.1V of the specified value. Readjust if it’s outside of the margin.
RGB Amplitude Adjustment (PC D-Sub input)
1) Receive PC signal (VGA [60Hz]), and indicate Service
Adjustment Menu.(Main)
2) Select No.652 of Service Adjustment Menu. Press
[OK] key more than 2 seconds to start the automatic adjustment. The adjustment
completes when the OSD reappears.
[Note] Never adjust without use of the specified
signal. If that were done by mistake, the picture would become abnormal in
black level, contrast and color.
In this case, it will be recovered by re-adjustment in the specified way.
In this case, it will be recovered by re-adjustment in the specified way.
RGB Amplitude Adjustment (Main/Sub)
1) Receive 576p or 480p adjustment signal on AV1
terminal input. Indicate Service Adjustment Menu.
2)Select No.652 (RGB amplitude gain adjustment Main) of Service Adjustment Menu. Press [OK] key more than 2 seconds to start the automatic adjustment.
The adjustment completes when the indication [Auto Mode] at the bottom of the screen disappears.
3)Select No.653 (RGB amplitude gain adjustment Sub) of Service Adjustment Menu. Press [OK] key more than 2 seconds to start the automatic adjustment. The adjustment completes when the indication [Auto Mode] at the bottom of the screen disappears.
2)Select No.652 (RGB amplitude gain adjustment Main) of Service Adjustment Menu. Press [OK] key more than 2 seconds to start the automatic adjustment.
The adjustment completes when the indication [Auto Mode] at the bottom of the screen disappears.
3)Select No.653 (RGB amplitude gain adjustment Sub) of Service Adjustment Menu. Press [OK] key more than 2 seconds to start the automatic adjustment. The adjustment completes when the indication [Auto Mode] at the bottom of the screen disappears.
Video Color Temperature Adjustment (Cool)
1) Perform the following adjustment with the
remote control.
2) Set the CRT color analyzer (CA100) at the
center of the panel.
3) Ensure that the service adjustment menu
(sub menu) No. 0, 1, 2, are all set as 255.
4) After receiving the video signal, step down
the two (or one) among adjustment No. 0, 1, 2 and adjust the values as shown
below.
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 generator of panel. So it can be presumed that maybe the panel has some trouble when the screen of Burn-in mode is abnormal.
LCD mode also has burn-in mode and some single color signals, which generated by FC PWB. Using the front control buttons with the set turned off (standby) can activate this mode. Press the SUB-POWER button, INPUT SELECT button and VOLUME DOWN button at the same time, and hold for more than 5 seconds.
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, INPUT SELECT button and UP ARROW button at the same time, and hold for more than 5 seconds. Burn-in mode will be released.
This mode displays the test patterns of some single color raster in turn. These signals are from built-in generator of panel. So it can be presumed that maybe the panel has some trouble when the screen of Burn-in mode is abnormal.
LCD mode also has burn-in mode and some single color signals, which generated by FC PWB. Using the front control buttons with the set turned off (standby) can activate this mode. Press the SUB-POWER button, INPUT SELECT button and VOLUME DOWN button at the same time, and hold for more than 5 seconds.
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, INPUT SELECT button and UP ARROW button at the same time, and hold for more than 5 seconds. Burn-in mode will be released.
How to recover the remote and front key function
If remote and front key cannot operate after miss set special function by front keys, these functions can recover by below method. Press the SUB-POWER button, INPUT SELECT button and DOWN ARROW button at the same time, and hold for more than 5 seconds. The set turns on the service menu mode. Select No.535 and No.536 then each data set from [0] to [1].
Or
Press the SUB-POWER button and DOWN ARROW button at the same time, and hold for more than 5 seconds.
If remote and front key cannot operate after miss set special function by front keys, these functions can recover by below method. Press the SUB-POWER button, INPUT SELECT button and DOWN ARROW button at the same time, and hold for more than 5 seconds. The set turns on the service menu mode. Select No.535 and No.536 then each data set from [0] to [1].
Or
Press the SUB-POWER button and DOWN ARROW button at the same time, and hold for more than 5 seconds.
How to check method of the use accumulation time for panel.
Select No.814 of Service Adjustment Menu.
Select No.814 of Service Adjustment Menu.
Select No.813 of Service Adjustment Menu change data from [0] to [1] press OK.
