Panasonic TX-PR50V10 Service Manual ▷ View online
25
7.24. Replace the plasma panel
Caution:
A new plasma panel itself without Hanger metals is
fragile.
To avoid the damage to new plasma panel, carry a new
plasma panel taking hold of the Hanger metals after
assembling the Hanger metals and the Stand brackets.
fragile.
To avoid the damage to new plasma panel, carry a new
plasma panel taking hold of the Hanger metals after
assembling the Hanger metals and the Stand brackets.
1. Place a carton box packed a new plasma panel on the flat
surface of the work bench.
2. Open a box and without taking a new plasma panel;
Attach the C1-Board, C2-Board and the C3-Board, con-
nect the flexible cables from the plasma panel to the C1-
Board, C2-Board and the C3-Board, and fit the flexible
cable holders.
nect the flexible cables from the plasma panel to the C1-
Board, C2-Board and the C3-Board, and fit the flexible
cable holders.
3. Attach the Hanger metals and the Stand brackets to the
new plasma panel.
4. Place the plasma panel on the servicing stand taking hold
of the Hanger metals.
5. Attach the cabinet assy and each P.C.Board and so on, to
the new plasma panel.
*When fitting the cabinet assy, be careful not to allow any
debris, dust or handling residue to remain between the
front glass and plasma panel.
26
8 Measurements and Adjustments
8.1.
Adjustment Procedure
8.1.1.
Driver Set-up
8.1.1.1.
Item / Preparation
1. Input a white signal to plasma video input.
2. Set the picture controls as follows.
2. Set the picture controls as follows.
Picture menu: Dynamic
PNR: Min
Aspect: 16:9
PNR: Min
Aspect: 16:9
Caution
1. First perform Vsus adjustment.
2. The Vscn voltages are measured from the Vad (Vad_base), but may be measured from the GND (GND_base) in an
2. The Vscn voltages are measured from the Vad (Vad_base), but may be measured from the GND (GND_base) in an
unavoidable case.
8.1.1.2.
Adjustments
Adjust driver section voltages referring the panel data on the panel data label.
Check or adjust the following voltages with the multimeter.
Check or adjust the following voltages with the multimeter.
*See the Panel label.
Name
Test Point
Voltage
Volume
Remarks
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
GND_base : - 47V ± 3V
VR16841
(SC)
(SC)
Vda
TP9 (P)
60V + 1V, - 2V
Fixed
27
8.1.2.
Initialization Pulse Adjust
1. Input the White signal to plasma video input.
2. Set the picture controls as follows.
2. Set the picture controls as follows.
Picture menu : Dynamic
PNR : Min
Aspect : 16:9
PNR : Min
Aspect : 16:9
3. Connect Oscilloscope to TPSC1 (SC).
Check the voltage (T2) at 100
μs period on the down slop.
8.1.3.
P.C.B. (Printed Circuit Board) exchange
8.1.3.1.
Caution
1. To remove P.C.B., wait 1 minute after power was off for discharge from electrolysis capacitors.
8.1.3.2.
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 below Ve not to damage the P.C.B.
Test point
Volume
Level
T2
TPSC1 (SC)
VR16601 (SC)
250 V ± 10 V
P.C.B.
Name
Test Point
Voltage
Volume
Remarks
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
GND_base : - 47V ± 3V
VR16841 (SC)
A/D Board
White balance and Sub brightness for NTSC, PAL, HD, PC and 625i signals
28
8.1.4.
Adjustment Volume Location
8.1.5.
Test Point Location
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