PANASONIC TH-42PZ700U SERVICE MODE AND POWER SUPPLY CIRCUIT

PANASONIC TH-42PZ700U SERVICE MODE AND POWER SUPPLY CIRCUIT

PANASONIC TH-42PZ700U 

SERVICE MODE AND POWER SUPPLY CIRCUIT 

Self-check Function
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 timing chart
1. Subject
Information of LED Flashing timing chart.
2. Contents
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.

Service Mode
How to enter into Service Mode
While pressing [VOLUME ( - )] button of the main unit, press [RECALL] 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 control.

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-check or any other command.

Exit
1. 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.

Name	Test Point	Voltage
Vsus	TPVSUS (SS)	Vsus ± 2V
Ve	TPVE (SS)	Ve ± 1V
Vset	TPVSET (SC)	365V ± 7V
Vad	TPVAD (SC)	-140V ± 1V
Vscn	TPVSCN (SC)	Vad+148V ± 1V
Vda	TPVDA (SS)	75V + 1V, -2V

White Balance Adjustment

Ensure aging is adequate.
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. Output a white balance pattern.
2. Check that the color temperature is “Cool”.
3. Set to serviceman mode, WB-ADJ.
4. Set “R-CUT” “G-CUT” “B-CUT” the values written.
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 FCh. That is, set “ALL DRIVE” to FCh.
8. Set color temperature to “Normal”.
9. Set “R-CUT” “G-CUT” “B-CUT” the values written.
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 FCh. That is, set “ALL DRIVE” to FCh.
13. Set color temperature to “Warm”.
14. Set “R-CUT” “G-CUT” “B-CUT” the values written.
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 FCh. That is, set “ALL DRIVE” to FCh.
18. Set color temperature to “Cool”.
[ adjustment of “Normal” “Warm” by data shift from “Cool” adjust. ] For “Normal” “Warm” adjustment, set values that the adjusted value of “Cool”
19. Copy values adjusted by HD pattern to the NTSC data area of EEPROM.

Hotel mode

1. Purpose
Restrict a function for hotels.
2. 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] : TV/VIDEO (3 times)

POWER SUPPLY CIRCUIT 

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