Emerson EWT19S2 Service Manual

5-6 L6118EA
12. 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
F.B.T= 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 con-
trol unit and select "C/D" mode. (Display changes
Service remote control unit. Display changes "C/
D," "VCO," "7F," "FRENCH," "ACCESS CODE,"
"STEREO," "VIDEO TONE," "FM-MODE" and
"AV-OUT" cyclically when "VOL p" button is
pressed.) Then press "1." The display will momen-
tarily 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 horizon-
tal 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.
13. 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 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 recep-
tor to the center on the tube surface (CRT).
5. Enter the Service mode. (See page 5-1) Press "VOL
p" button on the Service remote control unit and se-
lect "C/D" mode. (Display changes Service remote
control unit. Display changes "C/D," "VCO," "7F,"
"FRENCH," "ACCESS CODE," "STEREO," "VIDEO
TONE," "FM-MODE" and "AV-OUT" 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" buttons to ad-
just the values of color.
8. Adjust Red and Blue color so that the temperature be-
comes 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 horizon-
tal line becomes pure white.
10. Turn the unit 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 perform 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

Emerson EWT19S2 Specifications

General

Brand	Emerson
Model	EWT19S2
Category	TV
Language	English