Signal:
Display image: Don’t care
Contrast:
Brightness:
Limit:
Measure the hight voltage level at the anode cap.
High voltage should be within the limit as above.
If the high voltage needs adjustment use the
following procedure.
1024 x 768 (68 kHz/ 85 Hz)
Minimum
Minimum
26.0 kV ± 0.3 kV
PROCEDURE
1.
Turn the power off and disconnect the AC line
cord from the power source.
2.
Turn the power on after connecting high
voltage Probe.
3.
Using the jig, adjust the high voltage to the
specification.
* High Voltage Adjustment PROCEDURE using Softjig
x
Select matching model name in “Model” field.
Select “ @7: Zero Beam” in menu after
selecting “Extra 1”
Adjust high voltage using control bar after
selecting “HV MIN”
Turn the power off/ on after adjustment
finished.
Check the high voltage has been fixed with
adjusted value after reselecting “@7: Zero Beam”.
4-2-2 SCREEN VOLTAGE ADJUSTMENT
CONDITIONS
Signal:
Display image: Don’t care
Contrast:
Brightness:
Limit:
Screen Voltage adjustment procedure using softjig
is all the same as 4-2-1 but selecting “G2 CONT”
on the contrary to “HV MIN”.
4-2-3 CENTER RASTER
Adjust SW401 so that the back raster comes to the
center when you apply basic mode for 17”.
1024 x 768 (68 kHz/ 85 Hz)
Minimum
Minimum
520 V ± 10 V
4-2-4 Centering
Centering means to position the center point of
the display in the middle of the display area.
Horizontal size and position and vertical size and
position control the centering of the display.
Adjust the horizontal size and vertical size to their
optimal settings: 312 mm (H) x 234 mm (V).
Adjust the horizontal position and vertical
position to
≤
4.0 mm of the center point of the
screen.
|A-B|
≤
4.0 mm. |C-D|
≤
4.0 mm.
Figure 4-3. Centering
* In Softjig window, “Geometry” has to be
selected for GD adjustment.
4-2-4 (a) HORIZONTAL SIZE ADJUSTMENT
CONDITIONS
Scanning frequency:
Display image:
Brightness:
Contrast:
68 kHz/ 85 Hz
Crosshatch pattern
Maximum
Maximum
Use control bar after selecting “H-SIZE” in left
menu to adjust the horizontal size of the display
pattern to 312 mm.(Tolerance: ± 3 mm.)
If “H-SIZE” is not enough to adjust it, select
“SIZE B+” by turns.
4-2-4 (b) VERTICAL SIZE ADJUSTMENT
CONDITIONS
Scanning frequency:
Display image:
Brightness:
Contrast:
68 kHz/ 85 Hz
Crosshatch pattern
Maximum
Maximum
Use control bar after selecting
“V -SIZE”
in left
menu to adjust the vertical size of the display
pattern to 234 mm.(Tolerance: ± 3 mm.)
4 Alignment and Adjustments
SyncMaster 753DF/755DF
4-3
4-2 Display Control Adjustments
4-2-1 HIGH VOLTAGE ADJUSTMENT
C
A
DISPLAY AREA
EDGE OF BEZEL
B
D