5-4
L6315EA
8. Cut-off Adjustment
Purpose: To adjust the beam current of R, G, B, and
screen voltage.
Symptom of Misadjustment: White color may be
reddish, greenish or bluish.
Note: Screen Control FBT --- Main CBA
FBT= Fly Back Transformer
Use service remote control unit
1. Degauss the CRT and allow CRT to operate for 20
minutes before starting the alignment.
2. Input the Black Raster Signal from RF Input.
3. Enter the Service mode. (See page 5-1)
4. Press "VOL
p
" button on the service remote control
unit and select "C/D" mode. (Display changes "C/
D," "7F", "FRENCH," "ACCESS CODE," "STE-
REO," "VIDEO TONE," "FM MODE," and "V-OUT"
cyclically when "VOL
p
" button is pressed.) then
press "1." The display will momentarily show "CUT
OFF R" (R= Red.) Now there should be a horizontal
line across the center of the picture tube. If needed
gradually turn the screen control on the flyback,
clockwise until the horizontal line appears. Adjust
the Red Cut off by pressing the "CH
o
/
p
" buttons.
Proceed to Step 5 when the Red Cut off adjustment
is done.
5. Press the "2" button. The display will momentarily
show "CUT OFF G" (G=Green.) Adjust the Green
Cut off by pressing the "CH
o
/
p
" buttons. Proceed
to step 6 when the Green Cut off adjustment is done.
6. Press the "3" button. The display will momentarily
show "CUT OFF B" (B=Blue.) Adjust the Blue cut
off by pressing the "CH
o
/
p
" buttons. When
done with steps 4, 5 and 6 the horizontal line
should be pure white if not, then attempt the Cut off
adjustment again.
9. White Balance Adjustment
Purpose: To mix red, green and blue beams correctly
for pure white.
Symptom of Misadjustment: White becomes bluish
or reddish.
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," "7F", "FRENCH,"
"ACCESS CODE," "STEREO," "VIDEO TONE,"
"FM MODE," and "V-OUT" cyclically when "VOL
p
" button is pressed.) Then press "8" button on
the Service remote control Unit.
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
" 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.
Test Point
Adj. Point
Mode
Input
---
Screen-Control
CH
o
/
p
buttons
RF
Black
Raster
Tape
M. EQ.
Spec.
---
Pattern
Generator
See Reference
Notes below.
Figure
PATTERN GENERATOR
Fig 2
EXT. INPUT
Test Point
Adj. Point
Mode
Input
Screen
Screen-Control
CH
o
/
p
buttons
RF
White
Raster
(APL
100%)
Tape
M. EQ.
Spec.
Pattern
Generator,
Color analyzer
See below
Figure
Color Analyzer
Fig. 3
