Samsung AV17 Alignment and Adjustments
4 Alignment and Adjustments
This section of the service manual explains how to make permanent adjustments to the monitor. Directions
are given for adjustments using the monitor Interface Board Ver. 2.0 and software (Softjig).
4-1 Adjustment Conditions
Caution: Changes made without the Softjig are saved only to the user mode settings. As such, the
settings are not permanently stored and may be inadvertently deleted by the user.
4-1-1 Before Making Adjustments
4-1-1 (a) ORIENTATION
When servicing, always face the monitor to the
east.
4-1-1 (b) WARM-UP TIME
The monitor must be on for 30 minutes before
starting alignment. Warm-up time is especially
critical in color temperature and white balance
adjustments.
4-1-1 (c) SIGNAL
Analog, 0.7 Vp-p positive at 75 ohm, internal
termination
Sync: Separate
(TTL level negative/positive)
4-1-1 (d) SCANNING FREQUENCY
Horizontal : 30 kHz to 70 kHz (Automatic)
Vertical : 50 Hz to 160 Hz (Automatic)
Unless otherwise specified, adjust at the
1024 x 768 mode (68 kHz/85 Hz),
Refer to Table 2-1 on page 2-3.
4-1-2 Required Equipment
The following equipment may be necessary for
adjustment procedures:
4-1-2 (a) DISPLAY CONTROL ADJUSTMENT
1. Non-metallic (–) screwdriver:
1.5, 2.5, 3 mm
2. Non-metallic (+) screwdriver:
1.5, 2.5, 3 mm
3. Digital Multimeter (DMM), or
Digital Voltmeter
4. Signal generator, or
DM200 software
5. Personal computer
4-1-2 (b) COLOR ADJUSTMENTS
1. All equipment listed in 4-1-2 (a), above
2. Color analyzer, or any luminance
measurement equipment.
4-1-3 After Making Adjustments
After finishing all adjustments, test the monitor in
all directions. If, for example, the monitor does not
meet adjustment specifications when facing north,
reposition the monitor to face east and readjust.
This time, try for an adjustment closer to the ideal
setting within the tolerance range. Test the unit
again in all directions. If the monitor again fails to
meet specifications in every direction, contact
your Regional After Service Center for possible
CRT replacement.
AV17** 4-1
4 Alignment and Adjustments
4-2 Display Control Adjustments
4-2-1 HIGH VOLTAGE
Signal: 1024 x 768 (68 kHz/85 Hz)
Display image: Don’t care
Contrast: Minimum
Brightness: Minimum
Limit: 26.0 kV ± 0.3 kV
Measure the high voltage level at the anode cap.
High voltage should be within the limit as above.
4-2-2 CENTER RASTER
Adjust SW401 so that the back raster comes to the
center when you apply basic mode for 17”.
4-2-3 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 ≤ 5.0 mm of the center point of the
screen.
Run the All Mode save in the Right Menu.
Caution : Do not Run the All mode Save at the
other scannig times except for 1024x768
(68kHz/85Hz).
4-2-3 (b) VERTICAL SIZE ADJUSTMENT
CONDITIONS
Scanning frequency: 68 kHz/85 Hz
Display image: Crosshatch pattern
Brightness: Maximum
Contrast: Maximum
Use control bar after selecting “V-SIZE” in left
menu to adjust the vertical size of the display
pattern to 234 mm.(Tolerance: ± 4 mm.)
4-2-3 (c) HORIZONTAL POSITION ADJUSTMENT
CONDITIONS
Scanning frequency: 68 kHz/85 Hz
Display image: Crosshatch pattern
Use control bar after selecting “H-POSITION” in
left menu to center the horizontal image on the
raster.
|A-B| ≤ 5.0 mm. |C-D| ≤ 5.0 mm.
A
C
DISPLAY AREA
B
EDGE OF BEZEL
D
Figure 4-1. Centering
* In Softjig window, “Geometry” has to be
selected for GD adjustment.
4-2-3 (a) HORIZONTAL SIZE ADJUSTMENT
CONDITIONS
Scanning frequency: 68 kHz/85 Hz
Display image: Crosshatch pattern
Brightness: Maximum
Contrast: Maximum
Click Standard Dump on the right Menu in the
general field.
Use control bar after selecting size B+ in the left
Menu to adjust the horizontal size of the display,
Pattern to 312mm(Tolerance : ±4mm.)
4-2-3 (d) VERTICAL POSITION ADJUSTMENT
CONDITIONS
Scanning frequency: 68 kHz/85 Hz
Display image: Crosshatch pattern
Use control bar after selecting “V-POSITION” in
left menu to center the vertical image on the
raster.
4-2-4 Linearity
Linearity affects the symmetry of images as they
appear on the screen. Unless each row or column
of blocks in a crosshatch pattern is of equal size,
or within the tolerances shown in Tables 4-2 and
4-3, an image appears distorted, elongated or
squashed.
Table 4-1. Standard Modes Linearity:
1024x768/85Hz
Standard Modes Linearity
Difference between
adjacent blocks (4 %)
Horizontal: Less than 0.88 mm
Vertical : Less than 0.88 mm
4 : 3
Each block (10 %)
Horizontal: 20.9~23.1
Vertical : 20.9~23.1
4-2 AV17**
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