Panasonic TH-50PF11EK Service Manual ▷ View online
29
TH-50PF11EK
28. Remove 11 screws.
29. Pull the bottom of the Plasma Display Panel forward
(arrow1).
30. Slide the Plasma Display Panel and then remove the
Plasma Display Panel (arrow2).
31. Remove the Rear Cover Hook Right and Rear Cover
Hook Left from the Plasma Display Panel.
32. 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
Right, Rear Cover Hook Left, Rear Cover Spacer and
Rear Cover Spacer Ring when you exchange the Plasma
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.
place after exchanging the Plasma Display Panel.
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TH-50PF11EK
9 Measurements and Adjustments
9.1.
Adjustment Procedure
9.1.1.
Driver Set-up
9.1.1.1.
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=-140V, Voltage of Vscn is 5V ±4V.
When Vad=-140V, Voltage of Vscn is 5V ±4V.
9.1.1.2.
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 ± 1V
VR16000
(SS)
(SS)
*
Vset
TPVSET
(SC)
(SC)
325V + 7V, -
9V
9V
Fixed
Vad
TPVAD (SC) -140V ± 1V
VR16600
(SC)
(SC)
Vscn
TPVSCN
(SC)
(SC)
Vad+145V ±
4V
4V
Fixed
Vda
TPVDA (SS) 75V + 1V, -2V Fixed
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TH-50PF11EK
9.1.2.
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 VR16602 for 250V ± 10V.
9.1.3.
P.C.B. (Print Circuit Board) exchange
9.1.3.1.
Caution
1. To remove P.C.B., wait 1 minute after power was off for discharge from electrolysis capacitors.
9.1.3.2.
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)
VR16602 (SC)
250V ± 10V
at 100
at 100
µ
s
period on the down slope.
P.C.B.
Name
Test Point
Voltage
Volume
Remarks
P Board
Vsus
TPVSUS
Vsus ± 2V
VR251 (P)
*
SC Board
Vad
TPVAD
-140V ± 1V
VR16600 (SC)
Vscn
TPVSCN
Vad + 145V ± 4V
Fixed
Vset
TPVSET
325V + 7V, -9V
Fixed
SS Board
Ve
TPVE
Ve ± 1V
VR16000 (SS)
*
Vda
TPVDA
75V + 1V, -2V
Fixed
D, DS 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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TH-50PF11EK
9.1.4.
Adjustment Volume Location
9.1.5.
Test Point Location
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