Samsung AP17JS, AP17KS Alignment and Adjustments
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)
AP17KS
: 30 kHz to 85 kHz (Automatic) AP17JS
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
AP17K*/AP17J* 4-1
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 Alignment and Adjustments
4-2 AP17K*/AP17J*
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 hight 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 ≤ 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: 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 : ±3mm.)
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).
4-2-4 (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: ± 3 mm.)
4-2-4 (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.
4-2-4 (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 Display Control Adjustments
4-2-1 HIGH VOLTAGE ADJUSTMENT
C
A
DISPLAY AREA
EDGE OF BEZEL
B
D
4 Alignment and Adjustments
AP17K*/AP17J* 4-3
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: 640x480/85Hz,
800x600/85Hz and 1024x768/85Hz
Table 4-2. Other Modes Linearity: VGA, SVGA, XGA,
MAC, etc.
4-2-4 (a) HORIZONTAL LINEARITY ADJUSTMENT
CONDITIONS
Scanning frequency: 68 kHz/85 Hz
Display image: Crosshatch pattern
Brightness: Maximum
Contrast: Maximum
To adjust the Horizontal Linearity, refer to Tables
4-2 and 4-3 for the tolerance range.
Increase or decrease H_LIN to optimize the
image.
4-2-4 (b) VERTICAL LINEARITY ADJUSTMENT
CONDITIONS
Scanning frequency: 68 kHz/85 Hz
Display image: Crosshatch pattern
Brightness: Maximum
Contrast: Maximum
To adjust the Vertical Linearity, refer to Tables 4-2
and 4-3 for the tolerance range.
Use control bar after selecting “V-LINEARITY
BAL” in left menu to optimize the image.
4-2-5 Trapezoid Adjustment
CONDITIONS
Scanning frequency: 68 kHz/85 Hz
Display image: Crosshatch pattern
Brightness: Maximum
Contrast: Maximum
Use control bar after selecting “TRAPEZOID” in
left menu to make the image area rectangular.
Figure 4-4. Trapezoid
4-2-6 Pinbalance Adjustment
CONDITIONS
Scanning frequency: 68 kHz/85 Hz
Display image: Crosshatch pattern
Brightness: Maximum
Contrast: Maximum
Figure 4-5. Pinbalance
Use control bar after selecting “PINBALANCE” in
left menu to optimize the image.
| A - B | < 4 mm
A
B
B
A
4 : 3
5 : 4
Horizontal: 20.5~23.5
Vertical : 20.5~23.5
Horizontal: 19.18~22.07
Vertical : 20.5~23.5
Supported Timing Mode
Each block (14 %)
Difference between
adjacent blocks (5 %)
Horizontal: Less than 1.10 mm
Vertical : Less than 1.10 mm
Horizontal: Less than 1.03 mm
Vertical : Less than 1.10 mm
4 : 3
5 : 4
Horizontal: 20.9~23.1
Vertical : 20.9~23.1
Horizontal: 19.60~21.65
Vertical : 20.9~23.1
Standard Modes Linearity
Each block (10 %)
Difference between
adjacent blocks (4 %)
Horizontal: Less than 0.88 mm
Vertical : Less than 0.88 mm
Horizontal: Less than 0.82 mm
Vertical : Less than 0.88 mm
D1 D2 D1
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