PANASONIC VIERA TC-P42S1 - SERVICE MODE - HOTEL MODE - SELF CHECK MODE - PCB EXCHANGE - WHITE BALANCE ADJUSTMENT

TO ENTER 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

• Switch off the power with the [POWER] button on the main unit or the [POWER] button on the remote control to EXIT service mode.
• [VOL] button...Value of sub items change in forward direction ( + ), in reverse direction ( - ).

SERVICE TOOL MODE

• Select [SRV-TOOL] in Service Mode.
•  Press [OK] button on the remote control.

To 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.

To Exit;  Disconnect the AC cord from wall outlet.

Hotel mode: Purpose. To Restrict a function for hotels.

Access command to the Hotel mode setup menu In order to display the Hotel mode setup menu, 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.

• Self-check function to test the unit.

1. Checking the IIC bus lines
2. Power LED Blinking timing

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.
• To Exit: Disconnect the AC cord from wall outlet.

Adjustments

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

Caution

• First perform Vsus adjustment.
• The Vscn voltages are measured from the Vad (Vad_base), but may be measured from the GND (GND_base) in an unavoidable case.

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

Name	Test Point	Voltage	Volume
Vsus	TPVSUS (SS)	Vsus ± 2V	VR251(P)
Ve	TPVE (SS)	Ve ± 2.5V	Fixed
Vset	TPVSET (SC)	290V ± 9V	Fixed
Vad	TPVAD (SC)	- 195V ± 2V	VR16600 (SC)
Vscn	TPVSCN (SC)	Vad_base : 148V ± 1V GND_base : - 47V ± 3V	VR16841 (SC)
Vda	TP9 (P)	60V + 1V, - 2V	Fixed

See the Panel label.

P.C.B. (Printed Circuit Board) exchange

Caution: To remove P.C.B., wait 1 minute after power was off for discharge from electrolysis capacitors.

Quick adjustment after P.C.B. exchange: Adjust the following voltages with the multimeter.

P.C.B.	Name	Test Point	Voltage	Volume
P Board	Vsus	TPVSUS (SS)	Vsus ± 2V	VR251 (P)
SC Board	Vad	TPVAD (SC)	- 195V ± 2V	VR16600 (SC)
SC Board	Vscn	TPVSCN (SC)	Vad_base : 148V ± 1V GND_base : - 47V ± 3V	VR16841 (SC)
A Board		White balance and Sub brightness for NTSC, PAL, HD, PC and 625i signals

See the Panel label. Caution:  Absolutely do not reduce Vsus below Ve not to damage the P.C.B.

WHITE BALANCE ADJUSTMENT

• 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.
• Set the Picture menu to [vivid] and output the W/B pattern.

• Check that the color temperature is [Cool].
• Set to serviceman mode, WB-ADJ.
• Set [R-CUT] [G-CUT] [B-CUT] the values written in table 1.
• Attach the sensor of color analyzer to the center of highlight window.
• Fix G drive at C0h and adjust [B-DRV] and [R-DRV] so x, y value of color analyzer become the [Color temperature High] in table.
• 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.
• Set color temperature to [Normal].
• Set [R-CUT] [G-CUT] [B-CUT] the values written in table 1.
• Attach the sensor of color analyzer to the center of highlight window.
• Fix G drive at C0h and adjust [B-DRV] and [R-DRV] so x, y value of color analyzer become the [Color temperature Mid] in table.
• 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.
• Set color temperature to [Warm].
• Set [R-CUT] [G-CUT] [B-CUT] the values written in table 1.
• Attach the sensor of color analyzer to the center of highlight window.
• Fix G drive at C0h and adjust [B-DRV] and [R-DRV] so x, y value of color analyzer become the [Color temperature Low] in table.
• 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.
• Set color temperature to [Cool].

                                                            Click on the image to enlarge