4 Alignment and Adjustments
This section of the service manual explains how to make permanent adjustments to the monitor.
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 Adjustments4-1-1 (g) CENTER RASTER
Adjust VR401 so that the back raster comes to the
4-1-1 (a) ORIENTATIONcenter when you apply a signal of 91 kHz/85 Hz.
When servicing, always face the monitor to the
east.4-1-2 Required Equipment
4-1-1 (b) WARM-UP TIMEThe following equipment may be necessary for
adjustment procedures:
The monitor must be on for 30 minutes before
starting alignment. Warm-up time is especially4-1-2 (a) DISPLAY CONTROL ADJUSTMENT
critical in color temperature and white balance
1. Non-metallic (�) screwdriver: 1.5 mm
adjustments. Non-metallic (�) screwdriver: 3 mm
4-1-1 (c) SIGNAL2. Philips (+) screwdriver: 1.5 mm
Analog, 0.7 Vp-p positive at 75 ohm, internal3. Non-metallic hexkey: 2.5 mm
termination4. Digital Multimeter (DMM), or
Sync: Separate/Composite Digital Voltmeter (DVM)
(TTL level negative/positive)5. Signal generator, or
Sync-on-Green:Computer with a video board that uses the
Composite sync 0.3 Vp-p negativeET-4000 chipset (strongly recommended if
(Video 0.7 Vp-p positive)using Samsung DM 200 software) and that
displays: 1280 x 1024 @ 85 Hz, or 1600 x 1200
4-1-1 (d) SCANNING FREQUENCY@ 85 Hz (maximum).
Horizontal: 30 kHz to 96 kHz (Automatic)6. Personal computer
Vertical:50 Hz to 160 Hz (Automatic)
4-1-2 (b) COLOR ADJUSTMENTS
Unless otherwise specified, adjust at the
1024 x 768 mode (H: 68 kHz, V: 85 Hz) signals. 1. All equipment listed in 4-1-2 (a), above
2. Color analyzer, or any luminance
Refer to Table 2-1 on pages 2-2 and 2-3.
measurement equipmen
4-1-1 (e) HIGH VOLTAGE ADJUSTMENT
Signal:1024 x 768 mode (68 kHz/85 Hz)4-1-3 After Making Adjustments
Display image: Full white
Contrast:Maximum After finishing all adjustments, test the monitor in
Brightness:Maximumall directions. If, for example, the monitor does not
Limit:26 kV ? 0.5 kVmeet adjustment specifications when facing north,
(19�: 27 kV ? 0.5 kV)reposition the monitor to face east and readjust.
Measure the hight voltage level at the anode cap.This time, try for an adjustment closer to the ideal
High voltage should be within the limit as above.setting within the tolerance range. Test the unit
If the high voltage needs adjustment use theagain in all directions. If the monitor again fails to
Softjig.meet specifications in every direction, contact
your Regional After Service Center for possible
4-1-1 (f) G2 (SCREEN) VOLTAGE CRT replacement.
The Screen Voltage is fixed in the firm so donOt
need to adjust the Screen voltage.
G Adjust the screen VR of FST so that the G2 (screen) voltage it is 540 ? 10V (AQ19FS)
AQ17HS/AQ17IS/AQ17NS4-1
AQ19MS/AQ19IS/AQ19NS/AQ19FS |
ACEC
