Samsung DP15HS, DP17, DP17LS 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) MAGNETIC FIELDS
Whenever possible, use magnetic field isolation
equipment such as a Helmholtz field to surround
the monitor. If a Helmholtz field is not available,
frequently degauss the unit under test.
Caution: Other electrical equipment may cause
external magnetic fields which may
interfere with monitor performance.
Use an external degaussing coil to limit magnetic
build up on the monitor. If an external degaussing
coil is not available, use the internal degaussing
circuit. However, do not use the internal
degaussing circuit more than once per 30 minutes.
4-1-1 (c) 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 (d) SIGNAL
Analog, 0.7 Vp-p positive at 75 ohm, internal
termination
Sync: Separate
(TTL level negative/positive)
4-1-1 (e) SCANNING FREQUENCY
Horizontal: 30 kHz to 70 kHz (Automatic)
Vertical: 50 Hz to 160 Hz (Automatic)
Unless otherwise specified, adjust at the
17Ó: 1024 x 768 mode (68 kHz/85 Hz),
15Ó: 800 x 600 mode (54 kHz/85 Hz) signals.
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 (Ð) 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. Software: Softjig or DM200
6. Interface Board Ver. 2.0 Code No.
BH81-90001K
7. Parallel communications cable (25-pin to
25-pin); Code No. BH81-90001H
8. Signal cable (15-pin to 15-pin cable with
additional 3-pin connector); Code No.
BH81-90001J
9. 5 V DC adapter, not supplied
10. Personal computer
Note: Softjig AssÕy (includes items 6, 7 and 9)
Code No. BH81-90001L
4-1-2 (b) COLOR ADJUSTMENTS
1. All equipment listed in 4-1-2 (a), above
2. Color analyzer, or any luminance
measurement equipment
DP15H*/DP17L* 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.
4-1-3 Connecting the SoftJig
Connect the monitor to the signal generator and/
or PC as illustrated in Figures 4-1 and 4-2.
Note: The signal cable connector which includes
the 3-wire cable must connect to the
monitor. If you use Setup 2 (PC only, no
signal generator) you can only make
adjustments to the signal timing available
on that computer system. To make
corrections to all factory timings requires
the use of an additional signal generator.
4 Alignment and Adjustments
4-2 DP15H*/DP17L*
MONITOR
INTERFACE
BOARD VER. 2.0
PC
SIGNAL
GENERATOR
3-WIRE
CABLE
SIGNAL CABLE
5V DC
ADAPTOR
PARALLEL CABLE
Figure 4-1. Setup 1, With Signal Generator
MONITOR
INTERFACE
BOARD VER. 2.0
PC
3-WIRE CABLE
SIGNAL CABLE
PARALLEL CABLE
D-SUB
CONNECTOR
5V DC
ADAPTOR
Figure 4-2. Setup 2, Without Signal Generator
4-2-1 HIGH VOLTAGE ADJUSTMENT
Signal: 1024 x 768 (68 kHz/85 Hz) (17Ó)
800 x 600 (54 kHz/85 Hz) (15Ó)
Display image: DonÕt care
Contrast: Minimum
Brightness: Minimum
Limit: 26.5 kV ± 0.2 kV (17Ó)
25 kV ± 0.2 kV (15Ó)
exception) 26.0 kV ± 0.2 kV for 17Ó SDD CRT that
the DY type is DMX-1791AT
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.
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
① Select matching model name in ÒModelÓ field.
➁ Select Ò @7: Zero BeamÓ in menu after
selecting ÒExtra 1Ó
➂ Adjust high voltage using control bar after
selecting ÒHV MINÓ
➃ Turn the power off/on after adjustment
finished.
➄ Check the high voltage has been fixed with
adjusted value after reselecting Ò@7: Zero BeamÓ.
4-2-2 SCREEN VOLTAGE ADJUSTMENT
CONDITIONS
Signal: 1024 x 768 (68 kHz/85 Hz) (17Ó)
800 x 600 (54 kHz/85 Hz) (15Ó)
Display image: DonÕt care
Contrast: Minimum
Brightness: Minimum
Limit: 26.5 kV ± 0.2 kV (17Ó)
25 kV ± 0.2 kV (15Ó)
Screen Voltage adjustment procedure using softjig
is all the same as 4-2-1 but selecting ÒG2 CONTÓ
on the contrary to ÒHV MINÓ.
Table 4-1
4-2-3 CENTER RASTER
Adjust SW401 so that the back raster comes to the
center when you apply each basic mode for 15Ó
and 17Ó.
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: 306 mm (H) x 230 mm (V) for
17Ó, 267 mm (H) x 200 mm (V) for 15Ó.
Adjust the horizontal position and vertical
position to ² 4.0 mm of the center point of the
screen.
|A-B| ² 4.0 mm. |C-D| ² 4.0 mm.
Figure 4-3. Centering
* In Softjig window, ÒGeometryÓ has to be
selected for GD adjustment.
4-2-4 (a) HORIZONTAL SIZE ADJUSTMENT
CONDITIONS
Scanning frequency: 68 kHz/85 Hz (17Ó)
54 kHz/85 Hz (15Ó)
Display image: Crosshatch pattern
Brightness: Maximum
Contrast: Maximum
4 Alignment and Adjustments
DP15H*/DP17L* 4-3
4-2 Display Control Adjustments
C
A
DISPLAY AREA
EDGE OF BEZEL
B
D
17”
15”
CRT type Screen Voltage
M41QAR361X11*(*)
M41QAQ261X11*(*)
M41LFQ903X28(L), etc
M41EHN325X160/3F**U
M41EHN323X160/3F**U
M41LLJ507XX43*(F5), (F5W3)
M41LLH507XX43*(F5)
M36QAM351X11*(*)
M36LGE128X2**(*)
M36KUK35X02(*/LP), etc
480V
±
10V
500V
±
10V
630V
±
10V
560V
±
10V
600V
±
10V
520V
±
10V
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