10
3. White Balance adjustment:
A. Choose key of OSD and press it for above 10s,then enter into factory setting area for
modulation.
B. Brightness & contrast ratio MAX, fix to G-BIAS,fix to 40.
C. Raster Max modulation: Raster Pattern, adjust R or B bias and G2, make x=271±10, y=301±10,
Y=1.50±0.2 cd/m
2
D. Raster cut off modulation: Raster Pattern, adjust brightness to make Cut off: 0.34±0.01
cd/m
2
,and then put 9300K & 6500K into it.
E. Small white screen appears(P149),
Raster 0.34±0.01 cd/m
2
,set R or G or B gain,make
x=283±10, y=297±10，Y=145±1 cd/m
2
,then save it into 9300K color temperature,set R or G or B
gain, make x=313±10, y=329±10, then save it into 6500K color temperature.
F.White screen appears, Raster 0.34±0.01 cd/m
2
, adjust factory AB value, make it 9300K, color
temperature Y=108±1 cd/m2.
G. Raster modulation, adjust brightness and make it for: 0.04±0.01 cd/m
2
H. White screen appears,brightness cut off, set R or G or B gain,make x=313±10, y=329±10，
Y=80±1 cd/m
2
,then save it into sRGB color temperature, then exit factory setting area.
I. After modulation, it’s necessary to check if the white balance accords with the normal
specification. If not, which needs reset.
4. Focus Adjustment:
A. Set mode 6 1024×768, PATTERN 101 , Fv: 85Hz with character full page.
B. Set for under RECALL state .
C. Then adjust focus VR1 to a fine vertical line.
D. Adjust focus VR2 to a fine horizontal line.
E. Repeat step C & D.
5. Purity Adjustment
A. Be sure that the display is not being exposed to any external magnetic fields.
B. Ensure that the spacing between the Purity, Convergence, Magnet, (PCM), assembly and the
CRT stem is 29mm. (See below diagram)
C. Produce a complete, red pattern on the display. Adjust the purity magnet rings on the PCM
assembly to obtain a complete field of the color red. This is done by moving the two tabs in such
a manner that they advance in an opposite direction but at the same time to obtain the same
angle between the two tabs, which should be approximately 180'.
D. Check the complete blue and complete green patterns to observe their respective color purity.
Make minor adjustments if needed.
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