Dc945 Iit Calibration (Color Image Control) - Panasonic DP-C321 Service Handbook

3. 4. 4. 24 DC945 IIT Calibration (Color Image Control)

Description
• <White Reference Adjustment> Calculates and sets the White Reference Correction Coefficient.
• <CCD Calibration> Corrects the IIT sensitivity variations.
• <Optical Axis Correction> Reads the glass Regi positions (Lead/Side) with the platen open
when the lens unit is replaced, and calculates and displays the Regi Skew amount based on the
difference with the target value.
Function details
Reference Refer to ADJ1.1.7 IIT Calibration (DC945) in Chapter 2 for details on DC945 IIT
Calibration.
Procedure
1. Select the "Color Image Ctrl" tab on the Service Mode screen.
2. Select [DC945] on the IIT screen.
3. The IIT Calibration screen is displayed.
The following measurement items can be selected:
• White Reference Adjustment
• CCD Calibration
• Optical Axis Correction
<White Reference Adjustment>
1. Select and execute the White Reference.
2. Follow the instructions on the screen to execute. (Load 10 sheets or more on the Platen.)
The software to be adjusted was produced for P paper. For details, refer to ADJ1.1.7
DC945 IIT Calibration.
3. The Setup Value (3) is displayed on the White Reference Setup Value screen.
The M/C carries out the following operations:
(1) Carries out shading to stabilize the IIT state.
(2) Obtains the shading data.
(3) Carries out sampling of white paper data, then calculate and set up the White
Reference Correction Coefficient. (NVM715-080~082 are set.)
(4) Carries out shading to reflect the result of the White Reference Adjustment.
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<CCD Calibration>
1. Select and execute the CCD Calibration.
2. Follow the instructions shown in the screen. Place the Chart on the Platen Glass and select
[OK].
3. The data obtained is displayed in the CCD Calibration Setup Value column.
4. Select [Close] to return to the IIT screen.
<Optical Axis Correction>
1. Select the Optical Axis Correction from the measurement items.
2. Open the Platen, and click [Execute] without placing anything on the glass.
3. Click [OK] on the confirmation message.
After execution, the following data will appear. (Check while lowering the scroll bar in the
Execution Result Value area.)
• Judgement: OK/NG
• Front NUT Correction Angle: (Displayed in numbers)
• Rear NUT Correction Angle: (Displayed in numbers)
4. At NG, perform the required adjustments. (Refer to Chapter 2 ADJ1.1.7.)
Chapter 3 Troubleshooting