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

Use control bar after selecting ÒH-SIZEÓ in left
menu to adjust the horizontal size of the display
pattern to 306 mm (17Ó) and 267 mm (15Ó).
(Tolerance: ± 3 mm.)

If ÒH-SIZEÓ is not enough to adjust it, select
ÒSIZE B+Ó by turns.

4-2-4 (b) VERTICAL SIZE ADJUSTMENT
CONDITIONS

Scanning frequency: 68 kHz/85 Hz (17Ó)

54 kHz/85 Hz (15Ó)
Display image: Crosshatch pattern
Brightness: Maximum
Contrast: Maximum

Use control bar after selecting ÒV-SIZEÓ in left
menu to adjust the vertical size of the display
pattern to 230 mm (17Ó) and 200 mm (15Ó).
(Tolerance: ± 3 mm.)

4-2-4 (c) HORIZONTAL POSITION ADJUSTMENT
CONDITIONS

Scanning frequency: 68 kHz/85 Hz (17Ó)

54 kHz/85 Hz (15Ó)

Display image: Crosshatch pattern

Use control bar after selecting ÒH-POSITIONÓ 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 (17Ó)

54 kHz/85 Hz (15Ó)

Display image: Crosshatch pattern

Use control bar after selecting ÒV-POSITIONÓ in
left menu to center the vertical image on the
raster.

4-2-5 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 4-2. Standard Modes Linearity: 640x480/75Hz,

800x600/85Hz and 1024x768/85Hz

Table 4-3. Other Modes Linearity: VGA, SVGA, XGA,

MAC, etc.

4-2-5 (a) HORIZONTAL LINEARITY ADJUSTMENT
CONDITIONS

Scanning frequency: 68 kHz/85 Hz (17Ó)

54 kHz/85 Hz (15Ó)
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.

4-2-5 (b) VERTICAL LINEARITY ADJUSTMENT
CONDITIONS

Scanning frequency: 68 kHz/85 Hz (17Ó)

54 kHz/85 Hz (15Ó)
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 ÒV-LINEARITY
BALÓ in left menu to optimize the image.

4 Alignment and Adjustments

4-4 DP15H*/DP17L*

Figure 4-5. Pinbalance

4 : 3

5 : 4

Horizontal: 17.8~20.5
Vertical : 17.8~20.5

Horizontal: 16.7~19.2
Vertical : 17.8~20.5

Supported Timing Mode

Each block (10 %)

Difference between

adjacent blocks (5 %)

Horizontal: Less than 0.96 mm
Vertical : Less than 0.96 mm

Horizontal: Less than 0.90 mm
Vertical : Less than 0.96 mm

4 : 3

5 : 4

Horizontal: 18.2~20.1
Vertical : 18.2~20.1

Horizontal: 17.1~18.9
Vertical : 18.2~20.1

Standard Modes Linearity

Each block (10 %)

Difference between

adjacent blocks (4 %)

Horizontal: Less than 0.77 mm
Vertical : Less than 0.77 mm

Horizontal: Less than 0.72 mm
Vertical : Less than 0.77 mm

4-2-6 Trapezoid Adjustment

CONDITIONS

Scanning frequency: 68 kHz/85 Hz (17Ó)

54 kHz/85 Hz (15Ó)
Display image: Crosshatch pattern
Brightness: Maximum
Contrast: Maximum

Use control bar after selecting ÒTRAPEZOIDÓ in
left menu to make the image area rectangular.

Figure 4-4. Trapezoid

4-2-7 Pinbalance Adjustment

CONDITIONS

Scanning frequency: 68 kHz/85 Hz (17Ó)

54 kHz/85 Hz (15Ó)
Display image: Crosshatch pattern
Brightness: Maximum
Contrast: Maximum

Figure 4-5. Pinbalance

Use control bar after selecting ÒPINBALANCEÓ in
left menu to optimize the image.

4-2-8 Parallelogram Adjustment

CONDITIONS

Scanning Frequency: 68 kHz/85 Hz (17Ó)

54 kHz/85 Hz (15Ó)
Display image: Crosshatch pattern
Brightness: Maximum
Contrast: Maximum

Use control bar after selecting ÒPARALLELÓ in
left menu to make the image area rectangular.

Figure 4-6. Parallelogram

4-2-9 Side Pincushion Adjustment

CONDITIONS

Scanning frequency: 68 kHz/85 Hz (17Ó)

54 kHz/85 Hz (15Ó)

Display image: Crosshatch pattern

Use control bar after selecting ÒPINCUSHIONÓ in
left menu to straighten the sides of the image area.

4-2-10 Tilt Adjustment

CONDITIONS

Scanning Frequency: 68 kHz/85 Hz (17Ó)

54 kHz/85 Hz (15Ó)
Display image: Crosshatch pattern
Brightness: Maximum
Contrast: Maximum

Use control bar after selecting ÒROTATIONÓ in
left menu to correct the tilt of the display.

4-2-11 Degauss

No adjustments are available for the degaussing
circuit. The degaussing circuit can effectively
function only once per 30 minutes.

4-2-12 To Delete the User Mode Data

To delete the adjustment data from the user
modes, click Ò@4: USER DELETEÓ in right ment.

4-2-13 Save the Data

To save the adjustment data for a mode, press
Ò@3: ALL MODE SAVEÓ in right ment.

4 Alignment and Adjustments

DP15H*/DP17L* 4-5

| A - B | < 4 mm

A

4 mm

B

B

A

D1 D2 D1

| C1 |, | C2 | ≤ 2.0 mm, | D1 |, | D2 | ≤ 2.0 mm.

Figure 4-7. Pincushion

C2

C1

D1 D2

CAUTION:Check below condition before color

adjustment
Video signal : Analog 0.7 Vp-p (at 75 Ω)
Sync : TTL level (H, V seperate signal)

* Select ÒColorÓ in Softjig menu for color adjustment.

4-3-1 Color Coordinates (Temperature)

Color temperature is a measurement of the
radiant energy transmitted by a color. For
computer monitors, the color temperature refers
to the radiant energy transmitted by white. Color
coordinates are the X and Y coordinates on the
chromaticity diagram of wavelengths for the
visible spectrum.

CONDITIONS

Measurement instrument: Color analyzer
Scanning frequency: 68 kHz/85 Hz (17Ó)

54 kHz/85 Hz (15Ó)

Display image: White flat field at

center of display area

Luminance: Maximum

PROCEDURE

Use the directions in sections 4-3-2 through 4-3-3
to adjust the color coordinates for:
9300K to x = 0.283 ± 0.02, y = 0.298 ± 0.02
6500K to x = 0.313 ± 0.02, y = 0.329 ± 0.02

4-3-2 Color Adjustments for 9300K

4-3-2 (a) BACK RASTER COLOR ADJUSTMENT
CONDITIONS

Scanning frequency: 68 kHz/85 Hz (17Ó)

54 kHz/85 Hz (15Ó)
Display image: Back raster pattern
Brightness: Maximum
Contrast: Maximum

1. Select Ò@1: CHANNEL 1Ó in right menu to

control the color for 9300K.

2. Adjust the luminance of the back raster to

between 0.5 to 0.7 ft-L using contron bar after
selecting ÒGREEN CUTOFFÓ in the menu.

3. Use control bar after selecting ÒBLUE

CUTOFFÓ in left menu to set the ÒyÓ
coordinate to 0.298 ± 0.02.

4. Use control bar after selecting ÒRED

CUTOFFÓ in left menu to 0.283 ± 0.02.

* If color values would not be matched desirable

values, repeat sequence 3 and 4 after readjusting
ÒGREEN CUTOFFÓ control a little different.

4-3-2 (b) WHITE BALANCE ADJUSTMENT
CONDITIONS

Scanning frequency: 68 kHz/85 Hz (17Ó)

54 kHz/85 Hz (15Ó)
Display image: White box pattern
Brightness: 0.06ft-L at Back Raster

Pattern Display
Contrast: Maximum

Figure 4-8. White Box Pattern

1. Use control bar after selecting ÒRED GAINÓ,

ÒGREEN GAINÓ and ÒBLUE GAINÓ to adjust
the luminance to 45 ft-L (15Ó) and 46 ft-L
(17Ó) with the color coordinates ranged for
9300K to x = 0.283 ± 0.02, y = 0.298 ± 0.02.

exception) 17Ó SDD CRT type-named
(*/S-2) : 42ft-L.

4-3-2 (c) ABL ADJUSTMENT
CONDITIONS

Scanning frequency: 68 kHz/85 Hz (17Ó)

54 kHz/85 Hz (15Ó)
Display image: Full white pattern
Brightness: Maximum
Contrast: Maximum

Figure 4-9. Full White Pattern

1. Check the ABL. If it is not within the

specifications, use the ABL controls to adjust
it. (15Ó: 33 ± 1 ft-L, 17Ó: 36 ± 1 ft-L )

2. Select Ò@4: COLOR SAVEÓ to save the data.

3. Select Ò@6: ALL COLOR SAVEÓ to save the

CH2.

4 Alignment and Adjustments

4-6 DP15H*/DP17L*

4-3 Color Adjustments

1/3H-1/2H

1/3V-1/2V

FRONT BEZEL OPENING
BACK RASTER

WHITE WINDOW

FRONT BEZEL OPENING
BACK RASTER

WHITE WINDOW

4-3-2 (d) WHITE BALANCE ADJUSTMENT VERIFICATION
CONDITIONS

Scanning frequency: 68 kHz/85 Hz (17Ó)

54 kHz/85 Hz (15Ó)

Display image: Back raster pattern

Full White Pattern

X-Y Coordinates: x = 0.283 ± 0.02,

y = 0.298 ± 0.02
ABL Luminance Refer to 4-3-2(c)
Brightness: Maximum
Contrast: 5 ft-L, 24 ft-L

1. Check whether the color coordinates of the

back raster satisfy the above spec.
If they do not, return to 4-3-2 (a) and readjust

all settings.

2. Display a full white pattern.

3. Select ÒGeometryÓ in softjig menu.

4. Select Ò@7: 5-ft Ò in right menu.

5. Check whether the white coordinates of the

video meet the above coordinates spec.

6. Select Ò@8: 24-ft Ò in right menu.

7. Check whether the white coordinates of the

video satisfies the above spec.
If they do not, return to 4-3-2 (a) and readjust

all settings.

Select ÒColorÓ and click Ò@2: CHANNEL 2Ó
for color ajdustment for 6500K
Repeat the sequence of 9300K adjustment.
The luminance values the same as 9300K, but
the color coordinated of back raster and white
box are : x = 0.313

± 0.02 y = 0.329 ± 0.02

4-3-3 Luminance Uniformity Check

Luminance is considered uniform only if the ratio
of lowest to highest brightness areas on the screen
is not less than 7.5:10.

CONDITIONS

Scanning frequency: 68 kHz/85 Hz (17Ó)

54 kHz/85 Hz (15Ó)

(1024 x 768)
Display image: White flat field
Brightness: Cut off point at 24 ft-L
Contrast: Maximum

PROCEDURE

Measure luminance at nine points on the display
screen (see figure below).

4-3-4 Focus Adjustment

CONDITIONS

Scanning frequency: 68 kHz/85 Hz (17Ó)

54 kHz/85 Hz (15Ó)

(1024 x 768)
Display image: ÒHÓ character pattern
Brightness: Cut off point
Contrast: Maximum

PROCEDURE

1. Adjust the Focus VR on the FBT to display the

sharpest image possible.

2. Use Locktite to seal the Focus VR in position.

4-3-5 Color Purity Adjustment

Color purity is the absence of undesired color.
Conspicuous mislanding (unexpected color in a
uniform field) within the display area shall not be
visible at a distance of 50 cm from the CRT
surface.

CONDITIONS

Orientation: Monitor facing east
Scanning frequency: 68 kHz/85 Hz (17Ó)

54 kHz/85 Hz (15Ó)
Display image: White flat field
Luminance: Cut off point at the center

of the display area

Note: Color purity adjustments should only be

attempted by qualified personnel.

4 Alignment and Adjustments

DP15H*/DP17L* 4-7

Figure 4-10. Luminance Uniformity Check Locations

PROCEDURE

For trained and experienced service technicians
only.

Use the following procedure to correct minor
color purity problems:

1. Make sure the display is not affected by
external magnetic fields.

2. Very carefully break the glue seal between the
2-pole purity convergence magnets (PCM), the
band and the spacer (see Figures 4-12).

3. Make sure the spacing between the PCM
assembly and the CRT stem is 29 mm ± 1 mm.

4. Display a green pattern over the entire display
area.

5. Adjust the purity magnet rings on the PCM
assembly to display a pure green pattern.
(Optimum setting: x = 0.295 ± 0.015,
y = 0.594 ± 0.015)

6. Repeat steps 4 and 5 using a red pattern and
then again, using a blue pattern.

Table 4-4. Color Purity Tolerances

(For 9300K color adjustment: x = 0.283 ± 0.02, y = 0.298 ± 0.02)

7. When you have the PCMs properly adjusted,
carefully glue them together to prevent their
movement during shipping.

4 Alignment and Adjustments

4-8 DP15H*/DP17L*

Red: x = 0.640 ± 0.015 y = 0.323 ±0.015
Green: x = 0.295 ± 0.015 y = 0.594 ±0.015
Blue: x = 0.142 ± 0.015 y = 0.066 ±0.015