Saturday, October 17, 2015

HITACHI 32LD7800TA SERVICE MODE

HITACHI 32LD7800TA 


SERVICE MODE 

Adjustment Mode
How to get to Adjustment mode
Using the center of the upper control buttons with the set turned off (standby) can activate it.
Press the SUB-POWER  button, INPUT SELECT  button and DOWN button at the same time, and hold for more than 5 seconds.
The set turns on in adjustment mode with OSD.
Changing data and Selecting Adjustment code
When the set is in adjustment mode, the cursor LEFT, RIGHT ,UP , DOWN  and OK buttons of the remote control or the control buttons may be used as the adjustment keys. UP, DOWN buttons are used for selecting adjustment code. LEFT , 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.658) and change the data value from 0 to 1.
(3) Activate MEMORY INIT by pressing OK button for more than 3 seconds.
(4) Select No.525 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 UP button at the same time, and hold for more than 5 seconds. The unit is set to factory settings.
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 LCD panel. So it can be presumed that maybe the panel has some trouble when the screen of Burn-in mode is abnormal.
Using the center of the upper 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 button at the same time, and hold for more than 5 seconds. Burn-in mode will be released.
How to recover the remote and the center of the upper key function
If remote and the center of the upper key cannot operate after miss set special function by the center of the upper keys, these functions can recover by below method.
Press the SUB-POWER button, INPUT SELECT  button and UP button at the same time, and hold for more than 5 seconds. The set turns on the service menu mode.
Select No.535 and data set from [0] to [1].
Or
Press the SUB-POWER  button and DOWN 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.518 of Service Adjustment Menu.
Seif-Diagnosis
Signal circuit self-diagnosis function
This function is for the failure of the signal circuit, for example the phenomenon as below: "Sometimes power turns off abnormally." "Sometimes picture disappears abnormally." To enter to this Self-Diagnosis mode, follow the next steps:
Preparation:
1) The Power Cord should be connected to AC line and the Main Power switch should be turned on.
2) Turn the power off by the SUB-POWER button of the monitor or the remote control.
Procedure:
1) Press the SUB-POWER  button and UP button on the center of the upper of the monitor at the same time, and keep it for more than 5 seconds after the power turned on.
2) The monitor will be turned on, and it will display On-Screen Display of the Self-check result and the failure history as below.
3) Any operation would cancel the Self -Diagnosis mode.
If you clear history of failure, make FACTORY RESET: enter the factory setting mode; press the SUB-POWER button, INPUT SELECT button and UP button on the center of the upper of the monitor at the same time. And keep it for more than 5 seconds after the power turned on.