3.12.4 Port Status
Thistestmodeisnotapplicabletoeldserviceofthismachine.
3.12.5 Set Background Level
Thebackgroundlevelisanestablishedthresholdusedtohelpmeasurethereî™ective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î™ash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î™ash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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