Samsung AN19J-L Alignment and Adjustments

CONFIDENTIAL

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: TTL level, negative/positive

4-1-1 (d) SCANNING FREQUENCY

Horizontal:	30 kHz ~ 85 kHz (Automatic)
Vertical:	50 Hz ~ 160 Hz (Automatic)

Unless otherwise specified, adjust at the 1024 x 768 mode (68 kHz/85 Hz) signal.

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.

AN19L*/AN19J*

4-1

4 Alignment and Adjustments

4-2 Display Control Adjustments

CONFIDENTIAL

4-2-1 HIGH VOLTAGE

4-2-4 Centering

Signal:	1024 x 768 (68 kHz/85 Hz)
Display image:	Don’t care
Contrast:	Minimum
Brightness:	Minimum
Limit:	27.0 kV ± 0.2 kV

Measure the high voltage level at the anode cap. High voltage should be within the limit as above.

4-2-2 SCREEN VOLTAGE CHECK

CONDITIONS

Signal:

1024 x 768 (68 kHz/85 Hz)

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: 352 mm (H) x 264 mm.

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 image:		Full White Pattern
Contrast:		Minimum
Brightness:		Minimum
Limit:		27.0 kV ± 0.2 kV
No Adjustment.
Only check with below table.
			Table 4-1
	CRT Type		Screen Voltage
SDI	M46QCE261X211		530V ± 10V	AN19L*
SDI	M46QCK761X214		530V ± 10V	AN19J*

4-2-3 CENTER RASTER

Adjust VR401 so that the back raster comes to the center when you apply each basic mode.

	C
	DISPLAY AREA
A	B
	EDGE OF BEZEL
	D

Figure 4-3. Centering

4-2-4 (a) HORIZONTAL SIZE ADJUSTMENT

CONDITIONS
Scanning frequency:	68 kHz/85 Hz
Display image:	Crosshatch pattern
Brightness:	Maximum
Contrast:	Maximum

Use control bar after selecting “H-SIZE” in left menu to adjust the horizontal size of the display pattern to 352 mm with OSD “H-SIZE” fixed “39”. (Tolerance: ±3 mm.)

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 264 mm. (Tolerance: ± 3 mm.)

4-2	AN19L*/AN19J*

4 Alignment and Adjustments

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.

4-2-5 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 Table 4-2, an image appears distorted, elongated or squashed.

Horizontal Linearity = 2x X max-X min x100

			X max+X min
Vertical Linearity = 2x		Y max-Y min				x100
			Y max+Y min
	Table 4-2
			Adjacent Linearity			Entire Linearity
Preset mode			≤	4%		≤	8%
Pre-load mode (48kHz~)			≤	5%		≤	10%
Pre-load mode (under 48kHz)			≤	5%		≤	14%

Preset Mode : 68KHz / 85Hz

Pre-load Mode : Refer to Timing Chart

CONFIDENTIAL

4-2-5 (a) HORIZONTAL LINEARITY ADJUSTMENT

CONDITIONS
Scanning frequency:	68 kHz/85 Hz
Display image:	Crosshatch pattern
Brightness:	Maximum
Contrast:	Maximum

To adjust Horizontal Linearity, refer to Table 4-2 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
Display image:	Crosshatch pattern
Brightness:	Maximum
Contrast:	Maximum

To adjust the Vertical Linearity, refer to Table 4-2 for the tolerance range.

Use control bar after selecting “V-LINEARITY BAL” in left menu to optimize the image.

AN19L*/AN19J*

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