Advertisement
3.8 ADJUSTMENT PROCEDURE
3.8.1 DISPLAY UNIT
Mesuring
Item
instrument
PDP POWER
DC voltmeter
SUPPLY
VOLTAGE
Signal generator
Resistor (5Ω/5W)
Item
CN0AU/CN0AT
Measured
Disconnected
Designated
Value for Panel
Vs
±0.5V
Designated
Value for Panel
Vd
±0.5V
5.25 ± 0.1V
5V
CN0C4
(PDP POWER PWB: Chassis Base)
Vs
1
NC
2
3
Vd
4
NC
5V
5
GND
6
Designated Panel Voltage
Designated Panel Voltage
Vs/Vd Voltage Label
Vs/Vd Voltage Label
SUB POWER
SUB POWER
PWB
PWB
AUDIO
AUDIO
PWB
PWB
LINE FILTER PWB
LINE FILTER PWB
Chassis
Chassis
Base
Base
Designated Value for Panel/Layout of Adjustment VR
Designated Value for Panel/Layout of Adjustment VR
Test point
Adjustment part
CONNECTOR
R628:170V ADJ
CN0C4
(Vs VR)
[PDP POWER
R721: 60V ADJ
PWB]
(Vd VR)
CN0AU/CN0AT
Adjustment
Connected
Designated
Value for Panel
±0.5V
Designated
Value for Panel
±0.5V
5.20 ± 0.1V
5Ω/5W
/5W
5V
Vd
(Load Resistor)
(Load Resistor)
Fig.1
Voltage Adjustment VR (Vs, Vd)
Voltage Adjustment VR (Vs, Vd)
CN0C4
R628
CN0AU
170V
Connector for
Connector for
Adjustment
Adjustment
R721
CN0AT
60V
Fig.1
Fig.1
PDP POWER PWB
PDP POWER PWB
DISPLAY INTERFACE
DISPLAY INTERFACE
PWB
PWB
Display Input
Display Input
Terminal
Terminal
(Rear View)
(Rear View)
<When PDP POWER PWB is not Replaced>
(1) Connect the load resistor (5Ω/5W) to the CN0C4
connector on the PDP POWER PWB. (Fig.1)
(2) Adjust Vs (170V ADJ) VR and Vd (60 ADJ) VR such
that the Vs and Vd Load Resistor voltage tally with
those in the table.
(3) Ensure that the voltage between Pins 5 and 6 of
CN0C4 (5V) coincides with the table's value.
(4) Input the NTSC (525i) all-black signal and check
VR
that voltage coincides with the values in the table.
(5) Readjust if the adjusted value is different from those
R628
in the table.
NOTE:
R721
Designated value for the panel is printed on a small la-
bel on the top left corner at the back of the PDP.
-
<When PDP POWER PWB is Replaced>
CAUTION:
Before making adjustments, be sure not to turn on the
power when the CN0AT and CN0AU connectors are
connected, as this may cause the panel to break down.
(1) Disconnect the CN0AT and CN0AU connectors on
the PDP POWER PWB.
(2) Connect the load resistor (5Ω/5W) to the CN0C4
connector and turn on the power.
(3) Adjust Vs (170V ADJ) VR and Vd (60 ADJ) VR so
that the Vs and Vd voltage coincides with the values
in the table.
Vs
(4) Ensure that the voltage between Pins 5 and 6 of
CN0C4 (5V) coincides with the values in the table.
(5) Turn off the power, and connect the CN0AT and
CN0AU connectors and turn on the power again.
(6) Input the NTSC (525i) all-black signal and check
that it coincides with the Values in the table.
(7) If the adjusted value is different from those in the
table, fine-tune without unplugging the connectors.
CAUTION:
Designated power supply voltage of the panel (Vs, Vd)
varies according to the PDP units.
Pay careful attention during adjustment, as any error in
procedure may cause the PDP to break down.
Description
(No.52108)1-43
PD-42DXT
Advertisement
