Samsung AN17HS - Page 5

4 Alignment and Adjustments
This section of the service manual explains how to make permanet adjustments to the monitor.
Use the MTI-2031 jig and soft jig when adjust this part.
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.
INTERFACE BOARD
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15P SIGNAL CABLE
CABLE
SIGNAL
CABLE
COMMUNICATION
Figure 4-2. When using only PC
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
Syne: Separate /Composite
(TTL level negative/positive)
Syne-on-Green:
Composite sync 0.3 Vp-p negative
(Video 0.7 Vp-p positive)
Table 4-1. MDL File and DOC File on each model
Model MOL File DDC File Remarks
ANISIS | AN19|_SDI_BNC_v00 | SM957DF3.dde | Syncmaster
ANI9MS | AN?9MS_SDI_v0O | SM957P_3.dde | Syncmaster
ANISMT | ANISMT_SDI_vO0 | SM957P_3.dde | Syncmaster
ANI7IS ANi7\_SDI_voo SM757DF2.ddc | Syncmaster
ANI7HS AN17H_SDi_vO0 | SM703DF2.ddc | Syncmaster
ame iad
AN17HS/AN17IS/
AN1SMS/AN1SIS/AN1SMT
4-1-1 (d) SCANNING FREQUENCY
Horizontal: 30 kHz ~ 96 kHz (Automatic)
Vertical: 50 Hz ~ 160 Hz (Automatic)
4-1-1 (e) HIGH VOLTAGE ADJUSTMENT
Signal: 1024 x 768 mode (68 kHz / 85 Hz)
Display image: Full white
Contrast: Maximum
Brightness: Maximum
Limit: AN17 inch
Direct POINT : 26.0KV + 0.5KV
Indirect POINT : 200V + 1V
AN19 inch
Direct POINT : 27.0KV + 0.5KV
Indirect POINT : 210V + 1V
Measure high voltage with the indirect point
(LOCATION: EY511). If vou need, use the soft he.
4-1-1 (f} G2 (SCREEN) VOLTAGE
Adjust G2 voltage with screen VR of FBT up to
the voltage of 520V (17 inch) 530V (19 inch)
4-1
4 Alignment and Adjustments
4-2 Display Control Adjustments
4-2-1 Display Control Adjustments
4-2-1(a) HOW TO ADJUST THE SCREEN
Refer to the contents from 4-2-1 to 4-2-9.
1. Choose the MDL file of the relevant model on
MDL file.
2. Delete the user.
3. Dump the stand mode from the soft jig
geometry mode.
4. Save the all mode after adjusting the screen in
the standard mode (68 kHz / 85 Hz).
5. Savethe mode after adjusting the screen in the
other modes.
Notice : Don’t save the all mode after adjusting the
other mode.
4-2-2(b) TERMS OF THE SCREEN ADJUSTMENT
Scanning frequency: 68 kHz / 85 Hz
Screen: Latticed pattern
Brightness: The minimum (Cut-off)
Image: tThe maximum
4-2-2 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: see table 4-3.
1024 x 768 mode (68 kHz / 85 Hz)
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.
: -+— DISPLAY AREA
A r “8
r--— EDGE OF BEZEL
Figure 4-3. Centering
4-2-2 (a) HORIZONTAL SIZE ADJUSTMENT
Click on the << or >> box next to SIZE B+ to
adjust the horizontal size of the display pattern
to 312 mm / 356 mm (Tolerance: + 3 mm) as the
“H_SIZE” is “60” on the OSD.
4-2-2 (b) VERTICAL SIZE ADJUSTMENT
Click on the << or >> box next to V_SIZE to
adjust the vertical size of the display pattern to
234 mm / 264 mm. (Tolerance : + 3 mm)
4-2-2 (c) HORIZONTAL POSITION ADJUSTMENT
Click on the << or >> box next to H_POSI to
center the horizontal image on the raster.
ts
~2-2 (d) VERTICAL POSITION ADJUSTMENT
ick on the << or >> box next to V_POSI to
center the vertical image on the raster.
a)
4-2-3 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 Table 4-1, an
image will appear distorted, elongated or
squashed.
F ( ‘ X max-X min
Horizontal Linearity = 2x ————————-x100
X max+X min
Y max-Y min
Vertical Linearity = 2x ———_______ x100
Y max+Y min
Table 4-2.
—
Adjacent Linearity| Entire Linearity
Preset mode <4% < 8%
Pre-load mode (48 kHz~} <5% < 10%
i
Pre-load mode (under 48 kHz} S5% < 14%
# Preset Mode : 68 kHz / 85 Hz
Pre-load Mode : Refer to Timing Chart
4-2-3 (a) HORIZONTAL LINEARITY ADJUSTMENT
To adjust the Horizontal Linearity, refer to Table
4-1 for the tolerance range
Click on the << or >> box next to H_LLIN to
optimize the image.
Table 4-3
{Horizontal x Vertical Size Table}
17" 196
Horizontal 312 352
Verticai 234 264
_—_— SSeS
4-2
AN17HS/AN171S/
AN1SMS/AN191S/AN19MT