Samsung CF21G Series Service Manual page 10

4 Alignment and Adjustments
4-2-2 (b) VERTICAL LINEARITY ADJUSTMENT
CONDITIONS
Scanning frequency: 91 kHz / 85 Hz
Display image: Crosshatch pattern
Brightness: Cut-off
Contrast: Maximum
To adjust the Vertical Linearity, refer to Table 4-1
for the tolerance range.
Use control bar after selecting "V_LINEARITY
BAL" in left menu to optimize the image.
4-2-3 Trapezoid Adjustment
CONDITIONS
Scanning frequency: 91 kHz / 85 Hz
Display image: Crosshatch pattern
Brightness: Cut-off
Contrast: Maximum
Use control bar after selecting "TRAPEZOID" in
left menu to make the image area rectangular.
| A - B | < 5 mm
A
B
Figure 4-4. Trapezoid
4-2-4 Pinbalance Adjustment
CONDITIONS
Scanning frequency: 91 kHz / 85 Hz
Display image: Crosshatch pattern
Brightness: Cut-off
Contrast: Maximum
| D1 |, | D2 | ≤ 2.0 mm
D1 D2
Figure 4-5. Pinbalance
Use control bar after selecting "PINBALANCE" in
left menu to optimize the image.
4-2-5 Parallelogram Adjustment
CONDITIONS
Scanning Frequency: 91 kHz / 85 Hz
Display image: Crosshatch pattern
Brightness: Cut-off
Contrast: Maximum
Use control bar after selecting "PARALLEL" in
left menu to make the image area rectangular.
CF21G*
4-2-6 Side Pincushion Adjustment
CONDITIONS
Scanning frequency:
Display image:
Brightness:
Contrast:
Use control bar after selecting "PINCUSHION" in
left menu to straighten the sides of the image area.
A
B
4-2-7 Degauss
No adjustments are available for the degaussing
circuit. The degaussing circuit can effectively
function only once per 30 minutes.
4-2-8 Save the Data
D1
To save the adjustment data for factory
frequencys, press FACTORY SAVE.
4-2-9 To Delete the User Mode Data
To delete the adjustment data from the user
modes, click "@4: USER DELETE" in right menu.
CONFIDENTIAL
4 mm
Figure 4-6. Parallelogram
91 kHz / 85 Hz
Crosshatch pattern
Cut-off
Maximum
| C1 |, | C2 | ≤ 2.0 mm, | D1 |, | D2 | ≤ 2.0 mm.
C2
D1
C1
Figure 4-7. Pincushion
D2
4-3