Set Background Level - Muratec MFX-2550 Field Engineering Manual

3.12.4 Port Status
This test mode is not applicable to field service of this machine.

3.12.5 Set Background Level

The background level is an established threshold used to help measure the reflective ability of a
scanned document. This threshold can change if the scanner lamp, CCD, or the ballast is replaced;
therefore this mode should be used to reset the threshold when these items are changed.
The Set Background Level mode allows the level to be set without erasing memory contents.
1. Press <Setting>, <*>, <0>, <9>, then select [Background level].
2. Select the scanner to adjust. On MFX-2550, only [Front] is available.
3. Press [Start].
After the background level setting, the machine goes back to the ready screen.
3.12.6 Make color Gamma
The machine has a color gamma data table as color scanning correction data. The color gamma table
adjusts RGB color balance, and is unique per machine because of the optical variation. Both the main
board and compact flash memory card on the network board keep the color gamma table, and the
same data will be saved on both parts when you make a color data though below operation.
Perform this operation to remake the color gamna table when the following parts is replaced:
• Lamp
• Inverter
• Main board and compact flash memory card (replaced at the same time)
Either of the following chart is requied to make the color Gamma:
2007-01 No.20071020
NOTE
Use a clean chart that is not tanned or folder.
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