3MJ
CONTENTS
1-1 Specifications
1-1-1 Specifications..........................................................................................................................................1-1-1
1-1-2 Parts names............................................................................................................................................1-1-2
1-1-3 Machine cross section ............................................................................................................................1-1-3
1-2 Installation
1-2-1 Installation environment ..........................................................................................................................1-2-1
1-2-2 Unpacking ...............................................................................................................................................1-2-2
(1) Unpacking .........................................................................................................................................1-2-2
(2) Remove the tapes .............................................................................................................................1-2-3
1-3 Maintenance Mode
1-3-1 Maintenance mode .................................................................................................................................1-3-1
(1) Executing a maintenance item ..........................................................................................................1-3-1
(2) Maintenance mode item list...............................................................................................................1-3-2
(3) Contents of the maintenance mode items.........................................................................................1-3-3
1-4 Troubleshooting
1-4-1 Paper misfeed detection .........................................................................................................................1-4-1
(1) Paper misfeed indication ...................................................................................................................1-4-1
(2) Paper misfeed detection conditions ..................................................................................................1-4-1
(3) Paper misfeeds .................................................................................................................................1-4-2
1-4-2 Self-diagnosis .........................................................................................................................................1-4-3
(1) Self-diagnostic function .....................................................................................................................1-4-3
(2) Self diagnostic codes ........................................................................................................................1-4-3
1-4-3 Electric problems ....................................................................................................................................1-4-5
1-4-4 Mechanical problems ..............................................................................................................................1-4-6
1-5 Assembly and Disassembly
1-5-1 Precautions for assembly and disassembly............................................................................................1-5-1
(1) Precautions .......................................................................................................................................1-5-1
(2) Adjusting the positions of the front side registration cursor, rear side registration cursor and
trailing edge registration cursor (reference) ......................................................................................1-5-2
(3) Adjusting the pressure of curl eliminator mechanism........................................................................1-5-3
2-1 Mechanical construction
2-1-1 Construction of each section...................................................................................................................2-1-1
(1) Paper conveying operation in sort mode...........................................................................................2-1-2
2-1-2 Process table section..............................................................................................................................2-1-3
(1) Paper registration on the process table.............................................................................................2-1-4
2-1-3 Stapler section ........................................................................................................................................2-1-5
2-2 Electrical Parts Layout
2-2-1 Electrical parts layout..............................................................................................................................2-2-1
(1) Paper conveying section ...................................................................................................................2-2-1
(2) Process table section ........................................................................................................................2-2-2
(3) Stapler section...................................................................................................................................2-2-3
2-3 Operation of the PWBs
2-3-1 Finisher control PWB ..............................................................................................................................2-3-1
2-4 Appendixes
Maintenance parts list .............................................................................................................................2-4-1
Periodic maintenance procedures ..........................................................................................................2-4-1
Wiring diagram........................................................................................................................................2-4-2
Summary of Contents for DF-420
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