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13. 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
Screen-Control
Screen
CHo / p
buttons
Tape
M. EQ.
Pattern
Generator,
Color analyzer
Note: Use Service remote control unit
1. Operate the unit more than 20 minutes.
2. Face the unit to east. Degauss the CRT using De-
gaussing 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 recep-
tor to the center on the tube surface (CRT).
5. Enter the Service mode. Press "VOL p" button on
the Service remote control unit and select " C/D "
mode. (Display changes " C/D ", "VCO ", " 7F " and
" FRENCH " cyclically when "VOL p" button is
pressed.) then Press No. 8 button on the Service
remote control Unit.
6. Press No. 4 button on the service remote control
unit for Red adjustment. Press N0. 5 button on the
Service remote control unit for Blue adjustment.
7. In each color mode, Press "CH o / p" button to ad-
just the values of color.
8. Adjusting Red and Blue color so that the tempera-
ture becomes 9200K (x : 286 / y : 294) ±3%.
9. At this time, Re-check that Horizontal line is white.
If not, Re-adjust Cut-off Adjustment until the Hori-
zontal Line becomes pure white.
10. Turn off and on again to return to normal mode. Re-
ceive APL 100% white signal and Check 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.
Mode
Input
White
Raster
RF
(APL
100%)
Spec.
See below
Figure
Color Analyzer
Fig. 3
14. 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.
Test Point
Adj. Point
CHo / p
---
Tape
---
Generator
White
Note: IQW Setup level --- 7.5 IRE
Use Service remote control unit
1. Enter the Service mode. (See page 5-1)
Then input IQW signal from RF Input.
2. Press " MENU " button on the Service remote con-
trol unit and Select " BRT " mode. (Display changes
" BRT ", " CNT ", " CLR ", and " TNT " cyclically when
MENU button is pressed). Press "CH o / p" buttons
so that the bar is just visible (See above figure).
3. Turn the power off and on again. (Main power but-
ton on the TV unit.)
15. Focus Adjustment
Purpose: Set the optimum Focus.
Symptom of Misadjustment: If Focus Adjustment is
incorrect, blurred images are shown on the display.
Test Point
Adj. Point
---
Focus Control
Tape
Pattern
---
Generator
Note: Focus VR (FBT) --- Main CBA FBT= Fly Back Transformer
1. Operate the unit more than 30 minutes
2. Face the unit to the East and Degauss the CRT us-
ing Degaussing Coil.
3. Input the Monoscope Pattern.
4. Adjust the Focus Control on the FBT to obtain
clear picture.
5-6
Mode
RF
buttons
M. EQ.
Spec.
Pattern
See below
Figure
Black
This bar
just
visible
Fig. 4
Mode
RF
M. EQ.
Spec.
See below
Input
IQW
Input
Mono-
scope
L6310EA
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