No.51921
TM-A101G
25
It must be set the composite VIDEO signal input and 4:3 scan mode when adjust the white balance. It is no required to adjust in
the under scan screen mode.
Item Test equipment Test points
Adjustment
locations
Adjustment procedure
White
Balance
(Low light)
adjustment
Signal generator
(Monoscope pattern)
SCREEN VR
[Lower knob :
in FBT]
W01 R CUTOFF
W02 G CUTOFF
W03 B CUTOFF
[SERVICE MENU]
x
xx
x
Under the condition that B1 voltage adjustment
has been finished.
1. Input the monoscope pattern signal.
2. Select the WHITE BALANCE BLOCK mode from
<BLOCK SELECT> screen.
3. Confirm the initial setting value of W01, W02,
W03 in the SERVICE MENU are 120.
4. Select the CUTOFF adjustment mode.
5. Press “SERV” switch to display the single
horizontal line. Carefully adjust the SCREEN VR
to horizontal line appears faintly, not to shine
much.
6. Gradually turn the SCREEN VR from the left to
the right direction to bring one of the red, green
and blue colours faintly visible.
7. Then select the CUTOFF switch (R, G or B) that
colour except for appears first, and adjusting 2
colours CUTOFF values by pressing the +key,
and make horizontal line visible white.
8. Readjust the SCREEN VR to appear the
horizontal line faintly, and cancel the horizontal
line to press the “SERV” switch.
White
Balance
(High light)
6500K
adjustment
Signal generator
(Monoscope pattern)
Colour Analyser or
Colour temperature
meter
W04 R DRIVE
W05 B DRIVE
[SERVICE MENU]
x
xx
x
Under the condition that Low light adjustment
has been correctly finished.
1. Input the monoscope pattern signal.
2. Select the WHITE BALANCE BLOCK mode from
<BLOCK SELECT> screen.
3. Select the DRIVE adjustment mode (High light
mode).
4. Apply the sensor of the colour temperature
meter to the CRT surf ace, portion of the 100%
white, adjust the W04 (R DRIVE) or W05 (B
DRIVE) to setting 6500K (x=0.313, y=0.329).
5. Exit the SERVICE MENU by pressing the “EXIT”
key.
6. Check the white balance tracking is finest when
CONTRAST and BRIGHT are up and down.
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