Canon imageRUNNER 2520 Series Service Manual

Also see for imageRUNNER 2520 Series: Service manual

2-52Action to Take after Replacing the RAMCAUTION:The ADRAM is powered from the secondary battery unit to back up the image memoryeven after the main power switch is turned OFF and the power plug is removed fromthe outlet.If the SW3 on the main controller PCB is pressed with the image backed up, the entiredata stored in the memory is cleared. Be sure to output the data stored in the memorybefore pressing the SW3.Laser Exposure SystemAction to Take after Replacing the Laser Scanner UnitWhen replacing the laser unit, enter the values recorded on the label affixed to the laser unitto be replaced for the following in the service mode:145 146 147 136 148 149 150SW No.PRINT > Bitswitch > 136 Laser horizontal scanning direction write position adjustment(A)PRINT > Bitswitch > 145 Laser horizontal scanning direction magnification ratioadjustment(A-B)PRINT > Bitswitch > 146 Laser horizontal scanning direction magnification ratioadjustment(A-C)PRINT > Bitswitch > 147 Laser horizontal scanning direction magnification ratioadjustment(A-D)PRINT > Bitswitch > 148 Laser horizontal scanning direction write position adjustment(A-B)PRINT > Bitswitch > 149 Laser horizontal scanning direction write position adjustment(A-C)PRINT > Bitswitch > 150 Laser horizontal scanning direction write position adjustment(A-D)•••••••F-2-2F-2-2Image position adjustmentCopy 10 sheets from each pickup position to check that the image margin and non-imagearea is within the standard.Each cassettePickup trayIf it is not within the standard, go through the following procedures to adjust it.CAUTION:If changing the value of service mode item in this adjustment, enter the changed valuein the service label.Margin Along the Leading EdgeService mode> PRINT> PRINT NUMERIC> 0532 54 6 8 10 12 14 16 18 200Paperleading edgeDecrease the value.(a decrease of '10' willincrease the margin by 1 mm)Increase the value.(an increase of '10' willincrease the margin by 1 mm)1st side of copy: 2.5+/-1.5mm••F-2-3F-2-3All manuals and user guides at all-guides.com