HOW TO ENTER SERVICE MODE – HITACHI 42PD7500 Plasma Display – ERROR CODES – LED BLINKING CODES – SELF DIAGNOSIS – BURN-IN MODE

HOW TO ENTER SERVICE MODE – HITACHI 42PD7500 Plasma Display – ERROR CODES – LED BLINKING CODES – SELF DIAGNOSIS – BURN-IN MODE

How to enter Service Mode _ Error Display Codes _ LED blinking codes _ Self Diagnosis _ Signal circuit Self Diagnosis _ Burn in mode – Factory Reset - Memory Initialize -  HITACHI 42PD7500 – Plasma Display

 

LED BLINKING CODES

Self-Diagnosis Function
This chassis has 2 modes of self-diagnosis function.
1.  PDP panel check mode. It indicates the one latest record of the PDP panel failure with blinking of the power indication light (LED).
2. Signal circuit check mode.

 It indicates the check result on some points of the signal circuit and the history of them with On-Screen Display (OSD).

PDP panel self-diagnosis function
This function is for a PDP panel failure with no picture.
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 ▼ button on the bottom of the monitor at the same time, and keep it for more than 5 seconds after the power turned on.

2. It generates red blinking series of the power indicator light.
3. Any operation would cancel the Self -Diagnosis mode.
4. The next table shows the PDP PWB in which failure most probably would be allocated according to the number of blinks.

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 ▲ button on the bottom 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.
4. The following table shows the OSD symbols and contents of failure PWB in which failure most probably would be allocated according to the number of blinks.

If you clear history of failure, make FACTORY RESET: enter the factory setting mode; press the SUB-POWER( ) button, INPUT SELECT button and ▲  button on the bottom of the monitor at the same time. And keep it for more than 5 seconds after the power turned on.

ERROR CODES DISPLAY

Factory Reset
After all of the adjustments of main chassis are finished, perform FACTORY RESET.
Press the SUB-POWER button, INPUT SELECT button and ▲ button at the same time, and hold for more than 5 seconds.

The unit is set to factory settings.

Memory Initialize operation
NOTE: The execution of this function returns the adjustment codes to the preset values, therefore, adjustment
data will be lost.
Procedure* Enter Adjustment Mode.
* Select MEMORY INIT adjustment code (No.658) and change the data value from 0 to 1.
* Activate MEMORY INIT by pressing OK button for more than 3 seconds.
* Select No.525 and change data value from 1 to 0.
* Check that the receiving channel goes to P1. Unit is set to preset values.

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 PDP panel. So it can be presumed that maybe the panel has some trouble when the screen of Burn-in mode is abnormal.
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 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 ▼ 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], and select No.536 and data set from (0) to (1).
Or
Press the SUB-POWER button and Vol+ 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.

How to get to Adjustment (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 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 ▲, ▼, ◄, ►  and OK buttons of the remote control or front panel
may be used as the adjustment keys.

> ▲, ▼ buttons are used for selecting adjustment code.

> ◄, ► 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.