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(i) With the CRT biasing determined, do not touch the cutoff for that color.
(j) Use only two of the cutoffs that are indicated by the CRT color biasing template for
the adjustment until the low color is within specs. If there is difficulty in getting the
low color within specifications then move to high brightness color adjustment.
(k) Specifications for the white balance adjustment is at 9300 - x = 283±5, y = 298±5, Y=
33±1
(l) Set the contrast to maximum at 0x60.
(m) For high light color adjustment use R Drive for CIE x adjustments, G Drive for CIE y
adjustments. For brightness adjustment, use the R, G, B Drives and adjust them
together.
(n) Adjust the contrast to achieve about 2.5±1fl.
(o) Check and adjust the low light color until it is within the specification.
(p) Repeat steps (j) to (p) until the high and low color is within specifications.
(q) To save the color settings click on the “Save” button.
5. Auto white balance alignment
(a) Set the pattern to “VPT Page”.
(b) Initialize the CA100 by selecting [Minolta>Setup>Initialize CA100].
(c) Check that the remote light on the CA100 is lighted.
(d) To zero calibrate the probe select [Minolta>Setup>Zero Calibrate Probe].
(e) Place and hold the CA100 probe in the center of the white page.
(f) Select [Rework>White Balance>X-Align White Balance].
(g) When the white balance adjustment pass, the message shown is: “ Passed white
balance adjustment”.
VPT check and calibration
1. Equipment: calibrated CA100.
2. Condition:
(a) Timing mode is 1024x768@99Hz – select [Quantum Data>801 Formats>Cab 3 =
1024x768@99Hz].
(b) Pattern is “VPT Page” – select [Quantum Data>801 Patterns>VPT Page].
(c) Make sure the contrast is set at maximum 0x60.
3. VPT calibration check
(a) If the VPT data is downloaded from the factory file or original video board then
Select [Rework>VPT Tests>Check Calibration].
(b) Select memory channel 5 of CA100 to measure 9300.
(c) Take the reading of the CA100 and compare with the reading display from the
software.
(d) Pass the VPT calibration if the difference between the measured and calculated x, y
readings are within ± 5 units (e.g. if CA100 measured x = 285 and y = 300 and the
calculated x = 283, y = 298 then the VPT calibration check is a pass). If it failed then
performed the VPT calibration process described next.
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