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11.2
Description of Functions............................................11-3 2511103 0
11.3
Disassembly and Replacement.........................................11-4 2511104 0
12.
FUSER UNIT/PAPER-EXIT UNIT............................................12-1 4551201 2
12.1
General Description.................................................12-1 4551201 0
12.2
Description of Operations...........................................12-2 2511202 0
12.3
Functions of Each Part..............................................12-2 2511202 0
12.4
Heater Control Circuit..............................................12-4 4011204 0
12.4.1
Temperature Detection Unit.......................................12-4 4011204 0
12.4.2
Detection of Thermistor Burnout..................................12-6 4551206 0
12.5
Disassembly and Replacement.........................................12-7 4551207 0
12.6
Adjustment.........................................................12-16 4551216 0
12.6.1 Heat Roller Pressure Adjustment.................................12-16 4551216 0
13.
AUTOMATIC DUPLEXING DEVICE (ADD)......................................13-1 4551301 2
13.1
Introduction........................................................13-1 4551301 0
13.2
Construction........................................................13-2 4551302 0
13.2.1
Drive System.....................................................13-2 4551302 0
13.2.2
Driving of Exit/ADD Selection Gate...............................13-2 4551302 0
13.2.3
Driving of Stack Guides..........................................13-3 2511302 0
13.2.4
Driving of ADD Pick-Up Roller, ADD Feed Roller and
ADD Separation Roller...........................................13-4 4551304 0
13.2.5
Driving of ADD Aligning Roller...................................13-4 4551304 0
13.2.6
Driving of Transport Roller......................................13-4 4551304 0
13.3
Description of Operation............................................13-5 2511304 0
13.3.1
Paper Stacking Operation.........................................13-5 2511304 0
13.3.2
Duplexing (Re-Feeding) Operation.................................13-6 2511305 0
13.4
Motor Drive Circuit.................................................13-7 2511306 0
13.4.1
Brush Motor Drive Circuit........................................13-7 2511306 0
13.4.2
Pulse Motor Drive Circuit (Constant Current Type)................13-7 2511306 0
13.5
Disassembly and Replacement.........................................13-8 2511307 0
13.5.1
Stack Guide Unit.................................................13-8 2511307 0
13.5.2
Transport System................................................13-11 2511310 0
13.5.3
Drive System....................................................13-17 4551317 0
13.5.4
Switches........................................................13-21 4011320 0
13.6
Adjustment.........................................................13-24 2511322 0
13.6.1
Adjustment of Stack Guides......................................13-24 2511322 0
13.6.1.1
Installing the Stack Guide Unit..............................13-24 2511322 0
13.6.1.2
Adjusting the Stack Guide Unit in Position...................13-24 2511322 0
13.6.1.3
Adjusting ADD Side Deviation.................................13-25 2511323 0
13.6.2
Adjustment of ADD Pick-Up Roller Position.......................13-26 4551326 0
14.
LARGE CAPACITY CASSETTE (LCC).........................................14-1 4551401 2
14.1
Introduction........................................................14-1 4551401 0
14.2
Construction and Drive Mechanism....................................14-2 4551402 0
14.3
Description of Operation............................................14-2 4551402 0
14.3.1
Paper-Empty Detection............................................14-2 4551402 0
14.3.2
Operation of Paper Feeding.......................................14-2 4551402 0
14.3.3
Operation of Elevator Tray.......................................14-2 4551402 0
14.4
Disassembly and Replacement.........................................14-4 2511403 0
14.5
Adjustment.........................................................14-10 4551410 0
14.5.1
Changing of Paper Size..........................................14-10 4551410 0
14.5.2
Fine Adjustment of Paper Guides.................................14-11 4551411 0
15.
AUTOMATIC DOCUMENT FEEDER (ADF).......................................15-1 4551501 2
15.1
Introduction........................................................15-1 4551501 0
15.2
Construction........................................................15-2 4551502 0
15.3
Drive System Diagram (Rear View)....................................15-3 4551503 0
15.4
Explanation of Operation Sequence...................................15-4 4551504 0
15.4.1
Driving Directions of Rollers and Transport Belt.................15-4 4551504 0
15.4.2
Feeding/Exiting/Reversing of Originals...........................15-7 4551507 0
15.4.3
Description of Reversing Automatic Document Feeder (RADF)
Operation......................................................15-11 4551511 0
15.5
Block Diagram for Electrical Signals...............................15-13 4551513 0
15.6
Description of Interface Signals...................................15-14 4551514 0
4551304 0
4551511 0
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