Xerox WorkCentre 7132, Service Documentation

Page: 1198 / 1726

January 2007
4-247 WorkCentre 7132
ADJ 9.1.7, ADJ 9.1.8
Repairs/Adjustments Reversion 4.0
Figure 5 Shift of colors K and Y
ADJ 9.1.8 IIT Calibration
Purpose
The IIT Calibration is accomplished in two stages, White Reference Adjustment and CCD Cali-
bration.
• The White Reference Adjustment calculates the White Reference Correction using white
paper placed on the platen glass (reflectance difference from true white), and machine
NVM value for “True White”.
• CCD Calibration uses the standard test pattern, 82E13120 to calibrate the sensitivity of
the CCD. It looks at the 5 squares in the upper center of the test pattern as a reference to
do the calibration.
NOTE:
White Reference Adjustment
Adjustment
1. For the White Reference Check, use Xerox Digital Color Xpr or Co
paper. Result values for RGB should be approximately 130 to 145.
• Digital Color Xpr 24 lb. paper = 98 Brightness rating (90 gsm).
• Col paper = (90 gsm).
2. Place 10 sheets of A3 or 11 x 17” (short edge lead) clean white paper on the Document
Glass.
3. Enter the UI Diagnostic Mode.
4. Enter Max Setup, IIT Calibration, White Reference Adjustment.
5. Press the Start on the screen.
6. Result values for RGB should be in the range of 130 to 145. (Table 1)
7. If the values are within range proceed to the CCD Calibration Adjustment below.
8. If the values are out of range continue with this procedure.
CAUTION
If the Lens Kit was replaced, the Optical Axis Alignment (ADJ 9.1.9) must be performed.
9. If the Lens Kit was replaced, go to ADJ 9.1.9.
10. NVM 715-XXX is set to a 1. (With DADF, the lamp will park to the left.)
11. Make sure you have placed 10 sheets of 11 x 17 digital color Xpr paper against
the registration edge of the platen glass (98 Brightness).
12. Clean the Optics:
a. Switch off the power and allow the Exposure Lamp to cool off.
b. Using the optical Cleaning Cloth, clean the front and rear of the Document Glass, the
White Reference Strip, Reflector, and Mirrors.
The color K is shifted toward the
Trail Edge. The color Y is shifted toward
the Lead Edge.
Table 1 White Reference
R 135
G 136
B 138