Magnavox CT202MW8, Руководство по обслуживанию, Страница: 24 / 89

1-7-3 P7753EA
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.
Note: TP1301(BLUE) --- Sub CBA
1. Connect oscilloscope to TP1301.
2. Input a color bar signal from RF input.
Enter Service mode.
3. Enter the Service mode in TV 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,” “Y SW,” “B-S,” “BS2,”
and “C-ANG” cyclically when [0] button is
pressed.)
5. Press [CH
o
/
p
] buttons on the remote control
unit so that the carrier leakage B-Out (3.58 MHz)
value becomes minimum on the oscilloscope.
4. H f
0
Adjustment
Purpose: To get correct horizontal position and size of
screen image.
Symptom of Misadjustment: Horizontal position and
size of screen image may not be properly displayed.
Note: R2583 --- Sub CBA
1. Connect frequency counter to R2583 and ground.
2. Operate the unit for at least 20 minutes.
3. Enter the Service mode in TV mode.
4. Press [2] button on the service remote control unit
and select H-ADJ mode.
5. Press [CH.
o
/
p
] buttons on the service remote
control unit so that the display will change “0” to
“7.”
6. At this moment, choose display “0” to “7” when the
frequency counter display is closest to 15.734 kHz
±
300 Hz.
Test Point Adj. Point Mode Input
TP1301
(BLUE)
[CH
o
/
p
]
buttons
--- Color Bar
Tape M. EQ. Spec.
---
Oscilloscope
Pattern Generator
---
Figure
Fig. 2
minimum
Test Point Adj. Point Mode Input
R2583 [CH.
o
/
p
] buttons Video ---
Tape M. EQ. Spec.
--- Frequency Counter 15.734 kHz
±
300 Hz