Panasonic TH-50PH12U Service Manual ▷ View online
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TH-50PH12U
24. Disconnect the connectors (C33, C35, SS11, SS24).
25. Remove the flexible cables from the connectors (SS52,
25. Remove the flexible cables from the connectors (SS52,
SS55, SS58).
26. Remove 6 screws and then remove SS-Board and SS2-
Board.
27. Remove 9 screws and then remove P-Board.
28. Remove 6 screws and then remove the Barriers.
29. Remove the flexible cables from the connectors (C10,
C20, C22, C32).
30. Remove 12 screws.
31. Pull the bottom of the Plasma Display Panel forward
(arrow1).
32. Slide the Plasma Display Panel and then remove the
Plasma Display Panel (arrow2).
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TH-50PH12U
33. Remove the Rear Cover Hook Left and Right from the
Plasma Display Panel.
34. Remove the 8 Rear Cover Spacers and Rear Cover
Spacer Rings from the Plasma Display Panel.
Caution:
• Please confirm the installation place of Rear Cover Hook
Left and Right, Rear Cover Spacer and Rear Cover
Spacer Ring when you exchange the Plasma Display
Panel, and install them in an original installation place
after exchanging the Plasma Display Panel.
Spacer Ring when you exchange the Plasma Display
Panel, and install them in an original installation place
after exchanging the Plasma Display Panel.
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TH-50PH12U
10 Measurements and Adjustments
10.1. Adjustment Procedure
10.1.1.
Driver Set-up
10.1.1.1. Item / Preparation
1. Set Aging pattern (white pattern signal) by IIC mode.
2. Set the picture controls as follows.
2. Set the picture controls as follows.
Picture menu: Standard
Picture: +25
Aspect: Full
Picture: +25
Aspect: Full
Caution
1. First perform Vsus adjustment.
2. Confirmation of Vscn voltage should be performed after
2. Confirmation of Vscn voltage should be performed after
confirmation of Vad adjustment.
When Vad=-180V, Voltage of Vscn is -35V ±4V.
When Vad=-180V, Voltage of Vscn is -35V ±4V.
10.1.1.2. Adjustments
Adjust driver section voltages. (Refer to the panel data on the
Panel Label).
Check or adjust the following voltages with the multimeter.
Panel Label).
Check or adjust the following voltages with the multimeter.
*See the Panel Label.
Name
Test Point
Voltage
Volume
Remarks
Vsus
TPVSUS
(SS)
(SS)
Vsus ± 2V
VR251 (P)
*
Ve
TPVE (SS)
Ve ± 2.5V
Fixed
*
Vset
TPVSET
(SC)
(SC)
290V ± 9V
Fixed
Vad
TPVAD (SC) -180V ± 2V
VR16600
(SC)
(SC)
Vscn
TPVSCN
(SC)
(SC)
Vad_base:
+145V±4V
GND_base:
-35V±6V
+145V±4V
GND_base:
-35V±6V
Fixed
Vda
TP9 (P)
60V +1V , -2V Fixed
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TH-50PH12U
10.1.2.
Initialization Pulse Adjust
1. Set Aging pattern (white pattern signal) by IIC mode.
2. Set the picture controls as follows.
2. Set the picture controls as follows.
Picture menu: Standard
Picture: +25
Aspect: Full
Picture: +25
Aspect: Full
3. Connect Oscilloscope to TPSC1 and adjust VR16601 for 210V ± 10V.
10.1.3.
P.C.B. (Print Circuit Board) exchange
10.1.3.1. Caution
1. To remove P.C.B., wait 1 minute after power was off for discharge from electrolysis capacitors.
10.1.3.2. Quick adjustment after P.C.B. exchange
Adjust the following voltages with the multimeter.
*See the Panel Label.
Caution
Caution
Absolutely do not reduce Vsus voltage below Ve not to damage the P.C.B.
Test Point
Volume
Level
TPSC1 (SC)
VR16601 (SC)
210V ± 10V
at 100
at 100
µs
period on the down slope.
P.C.B.
Name
Test Point
Voltage
Volume
Remarks
P Board
Vsus
TPVSUS (SS)
Vsus ± 2V
VR251 (P)
*
SC Board
Vad
TPVAD (SC)
-180V ± 2V
VR16600 (SC)
Vscn
TPVSCN (SC)
Vad_base:+145V±4V
GND_base: -35V±6V
GND_base: -35V±6V
Fixed
Vset
TPVSET (SC)
290V ± 9V
Fixed
SS Board
Ve
TPVE (SS)
Ve ± 2.5V
Fixed
*
Vda
TPVDA (P)
60V +1V , -2V
Fixed
D, DS, DN Board
White balance and Sub brightness for NTSC, PAL, HD, PC and 625i signals
DN Board
Set Market Select Number to correct destination by MS mode (See chap. 6.1.4)
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