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3.11.2
Composition ..................................................................................................... 3-51
3.11.3
Functions ......................................................................................................... 3-52
3.12 DEVELOPMENT SYSTEM ............................................................................................. 3-54
3.12.1
Configuration ................................................................................................... 3-54
3.12.2
Construction..................................................................................................... 3-55
3.12.3
Functions ......................................................................................................... 3-56
3.13 FUSER UNIT................................................................................................................... 3-58
3.13.1
General Description ......................................................................................... 3-58
3.13.2
Functions ......................................................................................................... 3-59
3.13.3
Operation ......................................................................................................... 3-60
3.13.4
Heater Control Circuit ...................................................................................... 3-61
3.14 PAPER EXIT SECTION/REVERSE SECTION............................................................... 3-62
3.14.1
General Description ......................................................................................... 3-62
3.14.2
Functions ......................................................................................................... 3-63
3.14.3
Exit Motor / Reverse Motor / Offset Gate Motor Drive ..................................... 3-64
3.15 AUTOMATIC DUPLEXING UNIT (ADU)......................................................................... 3-66
3.15.1
General Description ......................................................................................... 3-66
3.15.2
Functions ......................................................................................................... 3-67
3.15.3
Description of Operations ................................................................................ 3-68
3.15.4
Drive of ADU.................................................................................................... 3-69
3.16 POWER SUPPLY UNIT .................................................................................................. 3-70
3.16.1
Construction..................................................................................................... 3-70
3.16.2
Operation of DC Output Circuits ...................................................................... 3-71
3.16.3
Output Channel................................................................................................ 3-73
3.16.4
Fuse................................................................................................................. 3-75
4. DISASSEMBLY AND REPLACEMENT........................................................................ 4-1
4.1
Disassembly and Replacement of Covers ........................................................................ 4-1
4.1.1
Front cover......................................................................................................... 4-1
4.1.2
Front upper cover .............................................................................................. 4-1
4.1.3
Front lower cover ............................................................................................... 4-2
4.1.4
Left upper cover................................................................................................. 4-2
4.1.5
Right upper cover .............................................................................................. 4-3
4.1.6
Rear cover ......................................................................................................... 4-3
4.1.7
Upper rear cover................................................................................................ 4-4
4.1.8
Left rear cover.................................................................................................... 4-4
4.1.9
Inner tray............................................................................................................ 4-4
4.1.10
Left cover ........................................................................................................... 4-5
4.1.11
Tray back cover ................................................................................................. 4-5
4.1.12
Connecting port cover........................................................................................ 4-5
4.1.13
Right rear cover-1 / Right rear cover-2 .............................................................. 4-6
4.1.14
Right front cover ................................................................................................ 4-6
4.1.15
Left front cover................................................................................................... 4-7
4.1.16
Paper exit cover ................................................................................................. 4-7
4.2
CONTROL PANEL............................................................................................................ 4-8
4.2.1
Control panel unit............................................................................................... 4-8
4.2.2
Display board (DSP) ........................................................................................ 4-10
4.2.3
KEY board (KEY)............................................................................................. 4-11
4.2.4
Touch panel (TCP) .......................................................................................... 4-11
4.2.5
Control panel cover.......................................................................................... 4-12
4.3
SCANNER....................................................................................................................... 4-13
4.3.1
Original glass ................................................................................................... 4-13
4.3.2
Lens cover ....................................................................................................... 4-13
4.3.3
Automatic original detection sensor (S1/S2/S3/S4/S5) ................................... 4-14
4.3.4
Exposure lamp................................................................................................. 4-15
4.3.5
Lens unit .......................................................................................................... 4-16
4.3.6
Scan motor (M1) .............................................................................................. 4-18
4.3.7
Carriage-1........................................................................................................ 4-19
4.3.8
LED driving PC board (LEDB) ......................................................................... 4-22
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