Panasonic PV20DF25 - MONITOR/DVD COMBO, Service Manual

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Fig. E6-2
7. Select V SIZE in EVR adjustment mode and adjust so that
the top 4th line is just in view, and that the Bottom edge is
between the 9th line and the 11th line.
8. Select H-CENTER in EVR adjustment menu and adjust so
that B is approximately equal to width C.
9. (For model with 27 inch CRT)
Adjust R766 so that the left 4th line is just in view.
10. Supply a Crosshatch Pattern Signal to the Video Input Jack.
Then, confirm that the picture is no distortion.
7.2.10. WHITE BALANCE ADJUSTMENT
Purpose: To set the standard white level for each
color temperature.
Symptom of
Misadjustment : White becomes bluish or reddish.
Test Point : TP50 (CRT C.B.A)
Adjustment : FOCUS CONTROL
(Flyback Transformer),
SCREEN CONTROL (Flyback
Transformer),
SUB BRIGHT (EVR),
G DRIVE (EVR),
B DRIVE (EVR),
R CUT-OFF (EVR),
G CUT-OFF (EVR),
B CUT-OFF (EVR)
Specification : Refer to descriptions below.
Input : Video Input Jack,
Monoscope Pattern Signal,
White Pattern Signal
Mode : STOP
Equipment : NTSC Video Pattern Generator,
White Pattern Generator,
Oscilloscope
1. Supply a Monoscope Pattern Signal to the Video Input
Jack.
2. Connect the Oscilloscope to TP50 on the CRT C.B.A.
(Use TP47 for GND.)
3. Select SUB BRIGHT and move the shaded area to the
value in EVR adjustment mode.
4. Adjust the FOCUS CONTROL on the Flyback Transformer
so that the "a" and "b" are the sharpest.
Fig. E7-1
5. Turn the SCREEN CONTROL on Flyback Transformer fully
counterclockwise.
6. Press DISPLAY key on the remote control for collapse
scan. (Refer to "HOW TO ENTER SERVICE MODE.")
7. Adjust SUB BRIGHT in EVR adjustment mode so that the
level A is 175 VDC±5 VDC.
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PV-20DF25 / PV-27DF25 / PV-27DF5 / PV-20DF25-K / PV-27DF25- K