Sylvania CD202SL8 Service Manual page 22

3. C-Trap Adjustment
Purpose: To get minimum leakage of the color signal
carrier.
Symptom of Misadjustment: If C-Trap Adjustment is
incorrect, stripes will appear on the screen.
Test point Adj. Point
[CH. o / p]
TP1503
(BLUE) buttons
Tape M. EQ.
Oscilloscope
---
Pattern Generator
Figure
minimum
Note: TP1503 (BLUE)--- Main CBA
1. Connect oscilloscope to TP1503.
2. Input a color bar signal from RF input.
3. Enter the Service mode in TV/VIDEO mode.
4. Press [0] button on the service remote control unit
and select "C-TRAP" mode. (Display changes "C-
TRP," "D-T TV," "D-T EXT," "D-T DVD," "B-S," and
"B-S2" cyclically when [0] button is pressed.)
5. Press [CH. o / p] buttons on the remote control
unit so that the carrier leakage B-Out (3.58MHz)
value becomes minimum on the oscilloscope.
6. Turn the power off and on again.
4. V. Size Adjustment
Purpose: To obtain correct vertical height of screen
image.
Symptom of Misadjustment: If V. Size is incorrect,
vertical height of image on the screen may not be
properly displayed.
Mode Input
--- Color Bar
Spec.
---
1. Operate the unit for at least 20 minutes.
2. Enter the Service mode in TV/VIDEO mode.
3. Press [9] button on the service remote control unit
4. Input monoscope pattern.
5. Press [CH. o / p] buttons on the remote control
Fig. 2
5. V. Position 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.
1. Operate the unit for at least 20 minutes.
2. Enter the Service mode in TV/VIDEO mode.
3. Press [9] button on the service remote control unit
4. Input monoscope pattern.
5. Press [CH. o / p] buttons on the service remote
6-3
Test point Adj. Point
[CH. o / p]
---
buttons
Tape M. EQ.
--- Pattern Generator
and select V-S mode. (Display changes "V-S" and
"V-P" cyclically when [9] button is pressed.)
unit so that the monoscope pattern is 90±5% of dis-
play size and the circle is round.
Test point Adj. Point
[CH. o / p]
---
buttons
Tape M. EQ.
--- Pattern Generator
and select "V-P" mode. (Display changes "V-S" and
"V-P" cyclically when [9] button is pressed.)
control unit so that the top and bottom of the
monoscope pattern are equal each other.
Mode Input
--- Monoscope
Spec.
90±5%
Mode Input
--- Monoscope
Spec.
---
P7450EA