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Konica Minolta bizhub 4750 bizhub 4750/4050 Maintenance/Troubleshooting User G - Page 24

NOTICE, Imaging Unit

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3.2 When a paper jam has occurred 3 3 Lift the handle, then pull out the Imaging Unit. NOTICE Do not touch the surface of the OPC drum. Doing so may cause reduce printing quality. 4 Place the Imaging Unit on a flat surface. NOTICE Do not leave the Imaging Unit on a place exposed to direct sunlight for 10 minutes or more. Long-term exposure will lead to reduced printing quality. 5 Lift the flap in the front-side of inside the main unit. [Maintenance/Troubleshooting] 3-7

Section	Page
Table of contents	2
1 Cleaning This Machine	5
1.1 Before getting started	5
1.2 Cleaning the outside of this machine	7
Control Panel	7
Exhaust Air Duct	7
Outer Covers	7
Original Glass	8
Original Cover Pad	8
2 Checking and Replacing Consumables	10
2.1 Checking the status of consumables	10
Consumables replacement messages	10
Checking the consumable level	10
2.2 Replacing consumables	11
2.2.1 Replacing a Toner Cartridge	11
Handling a Toner Cartridge	11
Storing Toner Cartridges	11
Replacement procedure	12
2.2.2 Replacing an Imaging Unit	13
2.2.3 Replacing a Staple Kit	15
3 Clearing Paper Jam and Staple Jam	19
3.1 To prevent a paper jam	19
3.2 When a paper jam has occurred	20
3.2.1 Clearing a paper jam in the Manual Feed Tray	20
3.2.2 Clearing a paper jam in Tray 1	21
3.2.3 Clearing a paper jam in Tray 2/3/4	22
3.2.4 Clearing a paper jam in ADF	23
3.2.5 Clearing a paper jam in the Front Cover	23
3.2.6 Clearing a paper jam in the Rear Cover	26
3.2.7 Clearing a paper jam in the Output Tray	27
3.2.8 Clearing a paper jam in the outlet of the Finisher	27
3.2.9 Clearing a paper jam in the rear of the Finisher	28
3.3 Troubleshooting for paper jam	30
3.4 Clearing a staple jam	32
4 Troubleshooting	35
4.1 The power is not turned on	35
4.2 The Touch Panel is not displayed	36
4.3 Cannot print	37
4.3.1 Cannot print	37
4.3.2 Problems on print quality	40
4.3.3 When the bit count does not match between the server and the client	41
4.4 Cannot perform network scanning	43
4.5 Cannot perform fax/internet fax	44
4.5.1 Cannot perform Fax TX	44
4.5.2 Cannot perform Fax RX	45
4.6 Cannot perform copy	46
4.7 Major messages and actions	48
Warning messages	48
Error messages	48
Service call	51
5 Checking the Counter	53