Panasonic TH-50PY80P / TH-50PZ80B / TH-50PZ80E Service Manual ▷ View online
25
Caution:
• Please confirm the installation place of Spacer and
Spacer Ring when you exchange the Plasma Panel, and
install Spacer and Spacer Ring in an original installation
place after exchanging the Plasma Panel.
install Spacer and Spacer Ring in an original installation
place after exchanging the Plasma Panel.
7.23. Remove the S-Board
1. Remove the Cabinet assy. (See section 7.19.)
2. Disconnect the connector (S1).
3. Remove the screws (
2. Disconnect the connector (S1).
3. Remove the screws (
×2
) and remove the S-Board
metal frame.
4. Remove the screws (
×2
) and remove the S-Board.
7.24. Remove the K-Board
1. Remove the Cabinet assy. (See section 7.19.)
2. Remove the S-Board. (See section 7.20.)
3. Remove the screws (
2. Remove the S-Board. (See section 7.20.)
3. Remove the screws (
×2 ).
4. Disconnect the connector (K1) and Remove the K-Board.
7.25. Remove the plasma panel (fin-
ished)
1. Place the new plasma panel (finished) on the flat surface
of the table (covered by a soft cloth), with the plasma
panel surface facing downward.
panel surface facing downward.
2. Attach the C1-Board, C2-Board and the C3-Board, con-
nect the flexible cables (
×15) from the plasma panel to the
C1-Board, C2-Board and the C3-Board, and fit the flexi-
ble cable holders.
ble cable holders.
3. Attach the Hooks (left, right) and fit the stand brackets (L,
R) to the new plasma panel.
4. Place the plasma panel section on the servicing stand.
5. Attach the cabinet assy and each P.C.Board and so on, to
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
*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: OFF
Aspect: 16 : 9
PNR: OFF
Aspect: 16 : 9
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.
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.
panel data 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
Fixed
Vad
TPVAD (SC) -140V ± 1V
VR16600
(SC)
(SC)
Vscn
TPVSCN
(SC)
(SC)
Vad+145V ± 4V Fixed
Vda
TPVDA (SS) 75V + 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: OFF
Aspect : 16 : 9
PNR: OFF
Aspect : 16 : 9
3. Connect Oscilloscope to TPSC1 (SC).
Check the voltage (T2) at 100 us 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)
VR16602 (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)
-140V ± 1V
VR16600 (SC)
SS Board
Ve
TPVE (SS)
Ve ± 1V
VR16000 (SS)
*
A, D Board
White balance and Sub brightness for NTSC, PAL, HD, PC and 625i signals
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8.1.4.
Adjustment Volume Location
8.1.5.
Test Point Location
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