Panasonic TX-PR42C10 Service Manual ▷ View online
25
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
R737 (P)
*
Ve
TPVE (SS)
Ve ± 2.5V
Fixed
*
Vset
TPVSET (SC)
290V ± 9V
Fixed
Vad
TPVAD (SC)
-180V ± 2V
VR16600 (SC)
Vscn
TPVSCN (SC)
Vad_base : + 145V ± 4V
GND_base : - 35V ± 6V
GND_base : - 35V ± 6V
Fixed
Vda
TPVDA (P)
60V + 1V, - 2V
Fixed
26
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)
210 V ± 10 V
P.C.B.
Name
Test Point
Voltage
Volume
Remarks
P Board
Vsus
TPVSUS (SS)
Vsus ± 2V
R737 (P)
*
SC Board
Vad
TPVAD (SC)
-180V ± 2V
VR16600 (SC)
A Board
White balance and Sub brightness for RF and 1080i signals
27
8.1.4.
Adjustment Volume Location
8.1.5.
Test Point Location
28
8.2.
Adjustment
8.2.1.
Sub-Contrast adjustment
Name of measuring instrument
Connection
Remarks
RF generator
Base Band signal generator
HD signal generator
Base Band signal generator
HD signal generator
Steps
Remarks
Adjustment of TV (RF system)
Note:
In adjustment, you must setting to modulation of signal at 85%.
1. Receive a RF PAL 100% Full White or Split Colour bar shown as below.
2. Goes into service adjustment mode.
3. Push a [ 1 ] or [ 2 ] key, and goes into adjustment mode for [ CONTRAST ].
3. Push a [ 1 ] or [ 2 ] key, and goes into adjustment mode for [ CONTRAST ].
Adjustment
1. The colour key yellow button of remote control is pushed.
2. The OSD character of sub-contrast becomes red.
2. The OSD character of sub-contrast becomes red.
(Inside under automatic adjustment)
3. The OSD character of sub-contrast returns to black.
4. End.
4. End.
Ref.:
RF signal modulation spec.
UK models: 80%
Other models: 90%
UK models: 80%
Other models: 90%
Note:
Sub-contrast adjustment is unadjusted
for AV/ HD input.
But, when needing the adjustment cho-
sen manually, please refer to [ alterna-
tive method ].
for AV/ HD input.
But, when needing the adjustment cho-
sen manually, please refer to [ alterna-
tive method ].
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