Symphonic ST27S3, Service Manual

Page: 17 / 52

5-4 L6609EA
9. PIN Cushion Adjustment
Purpose: To obtain correct straight vertical line of
screen image.
Symptom of Misadjustment: If H.Pin cushion is incor-
rect, vertical line of image on the screen may not be
properly displayed.
Note: Use Service remote control unit
1. Operate the unit for at least 20 minutes.
2. Receive the Cross hatch Pattern.
3. Adjust VR561 so that the cross hatch pattern will
be straight line of display.
4. Turn the Power off and on again. (Main power but-
ton on the TV unit.)
10. 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
" C/D ", " 7F ", " FRENCH ", " ACCESS CODE ", "
STEREO ", " VIDEO TONE ", " FM-MODE ", and "
V-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.
Test Point Adj. Point Mode Input
--- VR561 RF
Cross
hatch
Tape M. EQ. Spec.
--- Cross hatch
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