Symphonic SC724FDF Service Manual page 28

11. 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 M. EQ.
--- Pattern Generator
Note: Focus VR --- FBT (Sub CBA), FBT= Fly Back
Transformer
1. Operate the unit more than 30 minutes.
2. Face the unit to the East and degauss the CRT
using a degaussing coil.
3. Input the monoscope pattern.
4. Adjust the Focus Control on the FBT to obtain a
clear picture.
12. H. Position Adjustment
Purpose: To obtain correct horizontal position and
size of screen image.
Symptom of Misadjustment: Horizontal position and
size of screen image may not be properly displayed.
Test point Adj. Point
CH. o / p
---
buttons
Tape M. EQ.
--- Pattern Generator
1. Enter the Service mode. (See page 1-7-1.)
Press [8] button on the remote control unit and
select H-P mode.
2. Input monoscope pattern.
3. Press [CH. o / p] buttons on the remote control
unit so that the left and right side of the monoscope
pattern are equal to each other.
4. Turn the power off and on again.
13. V. Shift Adjustment
Purpose: To obtain correct vertical position of screen
image.
Symptom of Misadjustment: If V. position is incor-
rect, vertical position of image on the screen may not
be properly displayed.
Mode Input
--- Monoscope
Spec.
See below.
1. Enter the Service mode. (See page 1-7-1.)
2. Input monoscope pattern.
3. Press [CH. o / p] buttons on the remote control
14. V. Size Adjustment
Purpose: To obtain correct vertical height of screen
image.
Symptom of Misadjustment: If V. Size is incorrect,
Mode Input
vertical height of image on the screen may not be
properly displayed.
--- Monoscope
Spec.
---
1. Enter the Service mode. (See page 1-7-1.)
2. Input monoscope pattern.
3. Press [CH. o / p] buttons on the remote control
1-7-8
Test point Adj. Point
CH. o / p
---
buttons
Tape M. EQ.
--- Pattern Generator
Press [9] button on the remote control unit and
select V-P mode. (Press [9] button then display will
change to V-P and V-S).
unit so that the top and bottom of the monoscope
pattern are equal to each other.
Test point Adj. Point
CH. o / p
---
buttons
Tape M. EQ.
--- Pattern Generator
Press [9] button on the remote control unit and
select V-S mode. (Press [9] button then display will
change to V-P and V-S).
unit so that the monoscope pattern is 90±5% of
display size and the circle is round.
Mode Input
--- Monoscope
Spec.
---
Mode Input
--- Monoscope
Spec.
90±5%
T2127EA