White Balance Adjustment - Sylvania CD202SL8 Service Manual

6. H. Position Adjustment
Purpose: To obtain correct horizontal position of
screen image.
Symptom of Misadjustment: If H. Position is incor-
rect, horizontal position of image on the screen may
not be properly displayed.
Test point Adj. Point
[CH. o / p]
---
buttons
Tape M. EQ.
--- Pattern Generator
1. Operate the unit for at least 20 minutes.
2. Enter the Service mode in TV/VIDEO mode.
3. Press [8] button on the service remote control unit
and select "H-P" mode.
4. Input monoscope pattern.
5. Press [CH. o / p] buttons on the service remote
control unit so that the left and right side of the
monoscope pattern are equal to each other.

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
Note: Use the 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
Mode Input
Mono-
---
scope
Spec.
---
Mode Input
White Ras-
RF ter (APL
100%)
Spec.
See below
Color Analyzer
Fig. 3
receptor to the center on the tube surface (CRT).
5. Enter the Service mode in TV/VIDEO mode.
6. Press [VOL n] button on the service remote
control to enter "C/D" mode. (Display changes "C/
D," "YUV MEMORY," "TUNER," "QAM," "DTV-H,"
"D-SOUND," "DL V-CHIP," and "RC5" cyclically
when [VOL n] button is pressed.)
7. Press [4] button on the service remote control unit
for Red adjustment. Press [5] button on the service
remote control unit for Blue adjustment.
8. In each color mode, press [CH. o / p] buttons to
adjust values of color.
9. Adjust Red and Blue color so that the temperature
becomes 9200K (x: 286 / y: 294) ±3%.
10. At this time, check if horizontal line is white. If not,
adjust Cut-off Adjustment until the horizontal line
becomes pure white.
11. Turn off and on again to return to the 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.
6-4 P7450EA