Trouble Shooting
API Confidential
No Copy/Reproduction Allowed
3-1
Chapter 3
ALIGNMENT PROCEDURE
3.1Preparation for alignment :
(I) Setup unit and keep it warm up at least 30 minutes
(II) Signal mode
Mode
Frequency (H/V)
Display
1
31.47 K / 70.04 ( - / + )
640 * 400 (VGA 1)
2
31.47 K / 59.94 ( - / - )
640 * 480 (VGA 1)
3
46.875 K / 75 ( + / + )
800 * 600 (VESA)
4
53.674K / 85.062 (+/+)
800 * 600 (SVGA5)
5
60.02 K / 75 ( + / + )
1024 * 768 (UVGA7)
6
68.677 K / 84.996 ( + / + )
1024 * 768 (UVGA8)
7
79.98K / 75.02 ( + / + )
1280 * 1024(VESA)
8
81.25K / 64.81 (+ / +)
1600 * 1200 (VESA)
9
91.146K / 85.024 ( + / +)
1280 * 1024 (VESA)
3.2 B Adjustment
a. Input mode 91K (1280x1024) with cross-hatch Pattern.
b. Set brightness and contrast in OSD to maximal value
c. Adjust main board VR701 to main
200V
±
0.5V
3.3 HV Adjustment
a. Input mode 91K (1280x1024) with cross-hatch pattern.
b. Adjust VR302 to let anode voltage be
27
±
0.1KV (for Hitachi CRT) or 26
±
0.1KV(for Philips CRT)
3.4 H-center Adjustment
a. Input mode 91K (1280x1024) with cross-hatch pattern
b. If raster center is near the center of the screen
#
plug the HECN Wire into M305.
If raster center is near the right side of the screen
#
plug the HECN Wire into M306.
If raster center is near the left side of the screen
#
plug the HECN Wire into M307.
3.5 H-size preset
a. Input mode
31K (640x480)
with cross-hatch pattern
b. Use OSD to adjust H-size maximum
c. Adjust VR301 to make H-size
just overscreen
3.6 Factory setting mode adjustment
1.H-phase
: Set picture to the center of screen
2.H-Size
: Set picture to 360
±
2 mm
3.V-center
: Set picture to the center of screen
4.V-size
: Set picture to 270
±
2 mm
5.Tilt
: Let tilt
±
0.5mm between edge to edge
6.Pincushion
: Set picture to a real rectangular
7.Unbalance
: Set picture to a real rectangular
8.Trapezoid
: Set picture to rectangular or balance of top and bottom
9.Parallelogram: Set picture to rectangular or balance of top and bottom
10.Top Corner : Set the line of top corner to a straight line
11.Bottom Corner: Set the line of bottom corner to a straight line
3.7 Focus adjustment
a. Input mode
91K (1280x1024)
with green cross-hatch pattern
b. Adjust V(F2) Focus VR of FBT to make vertical line between center
and corner area of CRT clear
Summary of Contents for 7299sl
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Page 6: ...vi API Confidential No Copy Reproduction Allowed 7299sl Service Guide Appendix A A 1 ...
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