WorkCentre 7435 Family IIT Calibration
Xerox Internal Use Only
IIT Calibration IIT Calibration is made up of the following calibration features.
White Reference CCD Calibration – Reflection Ratio and B* Calibration Coefficients Optical Axis Calibration
• This routine should only be run after replacing a CCD Lens Assembly, Xenon Lamp, IIT /IPS PWB, or if directed by the service documentation • RUNNING THIS ROUTINE WITH INCORRECT PAPER, OR AN INCORRECT OR DIRTY/DAMAGED TEST PATTERM CAN ADVERSLY AFFECT IMAGE QUALITY
IIT Calibration
White Reference White Reference
Value
Red
136
Green
137
Blue
141
White Reference values should b e 135 + 5 bits Things to do, check if these readings are off • Make sure NVM location 715-106 (paper code) is set to 5 for XC (Digital Color Xpressions+) or 6 for XE (Color Tech+). • Make sure you use 10 sheets of 11X17 Color Expressions + 98 brightness paper to perform the setup. Kit #(128E1460) • Clean both sides of the Document Glass, Document Cover, White Reference Strip, Reflector, and Mirror. • Clean the Exposure Lamp with a clean cloth and Film Remover. • Clean the Lens with Lens and Mirror Cleaner and lint free cloth. • Replace the Xenon lamp. Lamp ballast PWB, IIT/IPS PWB, and CCD Lens Assembly Note: If White Reference numbers are off and you do not have color expressions 98 media input the values on the manufacturing sheets in tray 1 for 715-092 through 715094
CCD Calibration b* Calibration
PCON
SCAN
Correction Coefficient
3
3
b* Patch Measurement Value
225
211
b* Standard Value
225
225
Result
OK
OK
b* Calibration – the Patch Measurement shoul d be within + 10 bits of the Standard Value Things to do, check if judgment fails • Make sure you have the correct test pattern (82E13120) and it is clean and free of defects. • Make sure the test pattern is positioned with the L.E. toward the left of the platen glass. • Clean both sides of the Document Glass, Document Cover, White Reference Strip, Reflector, and Mirror. • Clean the Exposure Lamp with a clean cloth and Film Remover. • Clean the Lens with Lens and Mirror Cleaner and lint free cloth. • Replace the Xenon lamp. Lamp ballast PWB, IIT/IPS P WB, and CCD Lens Assembly If the standard value is 0 and the judgment fails go to NVM locati ons 715-260 and 715-266 and set them both to 225
CCD Calibration Reflection Ratio R
G
B
Y
73
107
215
M
136
227
208
C
230
171
101
K
242
242
243
Result
ok
• 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. • Highlighted squares in the above table should be 200 or higher • Yellow subtracts Blue (blue 200 or higher) • Magenta subtracts green (green 200 or higher) • Cyan subtracts red (red 200 or higher)
CCD Calibration Things to do, check if these readings are off Make sure you have the correct test pattern (82E13120) and it is clean and free of defects. Make sure the test pattern is positioned with the L.E. toward the left of the platen glass. Clean both sides of the Document Glass, Document Cover, White Reference Strip, Reflector, and Mirror. Clean the Exposure Lamp with a clean cloth and Film Remover. Clean the Lens with Lens and Mirror Cleaner and lint free cloth. If problem remains try replacing the Xenon lamp. Lamp ballast PWB, IIT/IPS PWB, and CCD Lens Assembly
Optical Axis Optical Axis Correction
Result
ok
Front Nut Correction angle
-15
Rear Nut Correction angle
-15
The purpose of this adjustment is to align the CCD with the Lens. This procedure should only be performed if the Lens or CCD is replaced, or if the documentation specifically directs. Follow your Service Documentation Adjustment 6.1 to complete this adjustment.
IIT Calibration
Created by: Katie Lazarus-Born
