FUNAI LH850-M32 Service Manual page 18

1. Purity Check Mode
This mode cycles through full-screen displays of red,
green, blue, and white to check for non-active pixels.
1. Enter the Service mode.
2. Each time pressing [7] button on the remote
control unit, the display changes as follows.
Purity Check Mode
White mode
Black mode
Red mode
Green mode
Blue mode
White 20% mode
Note:
When entering this mode, the default setting is White mode.
3. To cancel or to exit from the Purity Check Mode,
press [BACK] button.
[7] button
[7] button
[7] button
[7] button
[7] button
[7] button
2. VCOM Adjustment
Test Point
Screen
M. EQ.
Color analyzer
To avoid interference from ambinent
light, this adjustment should be
performed in a dark room.
Perpendicularity
L = 3 cm
1. Operate the unit for more than 20 minutes.
2. Set the color analyzer and bring the optical
receptor to the center on the LCD-Panel surface
after zero point calibration as shown above.
Note: The optical receptor must be set
perpendicularly to the LCD Panel surface.
3. Enter the Service mode.
4. To enter the "VCOM-2 adjustment mode", press [3]
button on the remote control unit.
To enter the "VCOM-1 adjustment mode", press [2]
button on the remote control unit.
5. Press [P /
unit so that the color analyzer value becomes
minimum.
6. To cancel or to exit from the VCOM Adjustment,
press [BACK] button.
5-2
Adj. Point
[P /
buttons
Spec.
See below
Figure
Color Analyzer
] buttons on the remote control
]
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