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7. White Balance Adjustment
Purpose: To mix red, green and blue beams correctly
for pure white.
Symptom of Misadjustment: White becomes bluish
or reddish.
Test Point
Adj. Point
CH. o / p
Screen
buttons
Tape
M. EQ.
Pattern
---
Generator,
Color analyzer
Figure
Color Analyzer
Note: Use service remote control unit
1. Operate the unit more than 20 minutes.
2. Face the unit to the east. Degauss the CRT using
a degaussing coil.
3. Input the White Raster (APL 100%).
4. Set the color analyzer to the CHROMA mode and
after zero point calibration, bring the optical
receptor to the center on the tube surface (CRT).
5. Enter the Service mode. Press "VOL p" button on
the service remote control to enter "C/D" mode.
6. Press "4" button on the service remote control unit
for Red adjustment. Press "5" button on the service
remote control unit for Blue adjustment.
7. In each color mode, press "CH. o / p" buttons to
adjust values of color.
8. Adjust Red and Blue color so that the temperature
becomes 9200K (x: 286 / y: 294) ±3%.
9. At this time, check that horizontal line is white. If
not, adjust Cut-off Adjustment until the horizontal
line becomes pure white.
10. Turn off and on again to return to normal mode.
Receive APL 100% white signal and confirm that
Chroma temperatures become 9200K (x: 286 / y:
294) ±3%.
Note: Confirm that Cut Off Adj. is correct after this
adjustment, and attempt Cut Off Adj. if needed.
All manuals and user guides at all-guides.com
8. Sub-Brightness Adjustment
Purpose: To get proper brightness.
Symptom of Misadjustment: If Sub-Brightness is
incorrect, proper brightness cannot be obtained by
adjusting the Brightness Control.
Mode
Input
White Ras-
RF
ter (APL
100%)
Spec.
See below
Fig. 3
Note: IQW Setup level --- 7.5 IRE
1. Enter the Service mode. (See page 1-6-1.)
2. Press "PICTURE" button on the service remote
3. Turn the power off and on again, using the main
1-6-4
Test Point
Adj. Point
CH. o / p
---
buttons
Tape
M. EQ.
Pattern
---
Generator
Figure
White
Use service remote control unit
Then input IQW signal from RF Input.
control unit and select "BRT" mode. (Display
changes "BRT," "CNT," "COL," "TNT," "V-TNT," and
"SHP" cyclically when "PICTURE" button is
pressed.) Press "CH. o / p" buttons so that the
bar is just visible (See above figure).
power button on the TV unit.
Mode
Input
RF
IQW
Spec.
See below
Black
This bar
just
visible
Fig. 4
T8201EA
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