PANASONIC TC-P42X1 LED BLINKING ERROR CODES SERVICE MODE AND ADJUSTMENTS

PANASONIC TC-P42X1 LED BLINKING ERROR CODES SERVICE MODE AND ADJUSTMENTS

PANASONIC TC-P42X1

PLASMA TV

LED BLINKING ERROR CODES SERVICE MODE AND ADJUSTMENTS 

Troubleshooting Guide
Use the self-check function to test the unit.
1. Checking the IIC bus lines
2. Power LED Blinking timing
Check of the IIC bus lines
How to access
Self-check indication only:
Produce TV reception screen, and while pressing [VOLUME ( - )] button on the main unit, press [OK] button on the remote control for more than 3 seconds.
Self-check indication and forced to factory shipment setting:

Produce TV reception screen, and while pressing [VOLUME ( - )] button on the main unit, press [MENU] button on the remote control for more than 3 seconds.
Exit
Disconnect the AC cord from wall outlet.

POWER LED BLINKING ERROR CODE
When an abnormality has occurred the unit, the protection circuit operates and reset to the stand by mode. At this time, the defective block can be identified by the number of blinks of the Power LED on the front panel of the unit.

CLICK ON THE IMAGE TO ZOOM IN 

 How to enter into Service Mode

While pressing [VOLUME ( - )] button of the main unit, press [INFO] button of the remote control three times within 2 seconds.

Key command
[1] button...Main items Selection in forward direction
[2] button...Main items Selection in reverse direction
[3] button...Sub items Selection in forward direction
[4] button...Sub items Selection in reverse direction
[VOL] button...Value of sub items change in forward direction ( + ), in reverse direction ( - )

How to exit
Switch off the power with the [POWER] button on the main unit or the [POWER] button on the remote control.

Service tool mode
How to access
1. Select [SRV-TOOL] in Service Mode.
2. Press [OK] button on the remote contro

Display of SOS History
SOS History (Number of LED blinking) indication.
From left side; Last SOS, before Last, three occurrence before, 2nd occurrence after shipment, 1st occurrence after shipment.
This indication except 2nd and 1st occurrence after shipment will be cleared by [Self-check indication and forced to factory shipment setting].
POWER ON TIME/COUNT
Note : To display TIME/COUNT menu, highlight position, then press MUTE for (3sec).
Time : Cumulative power on time, indicated hour : minute by decimal
Count : Number of ON times by decimal
Note : This indication will not be cleared by either of the self-checks or any other command.
Exit
1. Disconnect the AC cord from wall outlet.

Hotel mode
 Access command to the Hotel mode setup menu In order to display the Hotel mode setup menu, please enter the following command (within 2 second).
[TV] : Vol. [Down] + [REMOTE] : INPUT (3 times)

To exit the Hotel mode setup menu
Disconnect AC power cord from wall outlet.

Measurements and Adjustments
Adjustment Procedure
Driver Set-up
Item / Preparation
1. Input a white signal to plasma video input.
2. Set the picture controls as follows.
Picture menu: Vivid
Normal: Set
Aspect: Full
Caution
1. First perform Vsus adjustment.
2. Confirmation of Vscn voltage should be performed after confirmation of Vad adjustment.
When Vad=-180V, Voltage of Vscn is -35V ±4V.

Adjustments
Adjust driver section voltages referring the panel data on the panel data label.
Check or adjust the following voltages with the multimeter.

Name	Test Point	Voltage	Volume
Vsus	TPVSUS (SS)	Vsus ± 2V	R737 (P)
Ve	TPVE (SS)	Ve ± 2.5V	Fixed
Vset	TPVSET (SC)	290V ± 9V	Fixed
Vad	TPVAD (SC)	-180V ± 1V	VR16600(SC)
Vscn	TPVSCN (SC)	Vad + 145V ± 4V	Fixed
Vda	TPVDA (P)	60V + 1V, - 2V	Fixed

Initialization Pulse Adjust
1. Input the White signal to plasma video input.
2. Set the picture controls as follows.
Picture menu : Vivid
Normal : Set
Aspect : Full
3. Connect Oscilloscope to TPSC1 (SC).
Check the voltage (T2) at 100μs period on the down slop.

T2 > TPSC1 (SC)  > VR16601 (SC)  > 210 V ± 10 V

White balance adjustment

Procedure

# Make sure the front panel to be used on the final set is fitted.
# Make sure a color signal is not being shown before adjustment.
# Put the color analyzer where there is little color variation.
1. Set the Picture menu to [vivid] and output the W/B pattern.

2. Check that the color temperature is [Cool].
3. Set to serviceman mode, WB-ADJ.
4. Set [R-CUT] [G-CUT] [B-CUT].
5. Attach the sensor of color analyzer to the center of highlight window.
6. Fix G drive at C0h and adjust [B-DRV] and [R-DRV] so x, y value of color analyzer become the [Color temperature High].
7. Increase RGB together so the maximum drive value in RGB becomes FC. That is, set [ALL DRIVE] to FC.
Execute adjustment again. When that, the maximum value of R/G/B DRV should be FC, and either R/G/B DRV should be FC.
8. Set color temperature to [Normal].
9. Set [R-CUT] [G-CUT] [B-CUT] .
10. Attach the sensor of color analyzer to the center of highlight window.
11. Fix G drive at C0h and adjust [B-DRV] and [R-DRV] so x, y value of color analyzer become the [Color temperature Mid].
12. Increase RGB together so the maximum drive value in RGB becomes FC. That is, set [ALL DRIVE] to FC.
Execute adjustment again. When that, the maximum value of R/G/B DRV should be FC, and either R/G/B DRV should be FC.
13. Set color temperature to [Warm].
14. Set [R-CUT] [G-CUT] [B-CUT].
15. Attach the sensor of color analyzer to the center of highlight window.
16. Fix G drive at C0h and adjust [B-DRV] and [R-DRV] so x, y value of color analyzer become the [Color temperature Low].
17. Increase RGB together so the maximum drive value in RGB becomes FC. That is, set [ALL DRIVE] to FC.
Execute adjustment again. When that, the maximum value of R/G/B DRV should be FC, and either R/G/B DRV should be FC.
18. Set color temperature to [Cool].