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1.2 Red-painted screws .................................................................................................................................................................F-1
1.3 Variable resistors on board......................................................................................................................................................F-1
1.4 Warnings for disassembly........................................................................................................................................................F-1
1.5 Warnings / Precautions during setup or transportation............................................................................................................F-2
2. Units from which removing is prohibited................................................................................................................... F-3
2.1 PH unit .....................................................................................................................................................................................F-3
2.1.1 Reason for prohibition ....................................................................................................................................................F-3
2.2 Fusing unit ...............................................................................................................................................................................F-3
2.2.1 Reason for prohibition ....................................................................................................................................................F-3
3. Disassembly/assembly warning/caution items ......................................................................................................... F-4
3.1 Removal/installing of PWBs.....................................................................................................................................................F-4
4.
d-Color MF4003/MF3303 .......................................................................................................................................... F-5
4.1 Exterior parts ...........................................................................................................................................................................F-5
4.1.1 Front door .......................................................................................................................................................................F-5
4.1.2 Left cover........................................................................................................................................................................F-5
4.1.3 Rear cover ......................................................................................................................................................................F-5
4.1.4 Exit cover........................................................................................................................................................................F-6
4.1.5 Control panel unit ...........................................................................................................................................................F-6
4.1.6 Control panel cover ........................................................................................................................................................F-8
4.1.7 Tray1 ..............................................................................................................................................................................F-8
4.1.8 Scanner upper cover ......................................................................................................................................................F-9
4.1.9 Front cover (ADF)...........................................................................................................................................................F-9
4.1.10 Rear cover (ADF) ....................................................................................................................................................... F-10
4.2 Units.......................................................................................................................................................................................F-10
4.2.1 Manual bypass tray unit................................................................................................................................................F-10
4.2.2 PH unit..........................................................................................................................................................................F-12
4.2.3 2nd transfer pressure unit.............................................................................................................................................F-13
4.2.4 Main drive unit ..............................................................................................................................................................F-14
4.2.5 Manual bypass tray roller unit....................................................................................................................................... F-15
4.2.6 Paper feed unit .............................................................................................................................................................F-16
4.2.7 PWB box.......................................................................................................................................................................F-17
4.2.8 Fusing drive unit ...........................................................................................................................................................F-18
4.2.9 ADF ..............................................................................................................................................................................F-20
4.2.10 CIS module................................................................................................................................................................. F-20
4.2.11 DF CIS module assy................................................................................................................................................... F-21
4.2.12 Scanner unit ............................................................................................................................................................... F-22
4.3 Boards ...................................................................................................................................................................................F-24
4.3.1 Base board (BASEB)....................................................................................................................................................F-24
4.3.2 Storage board (STRGB) ............................................................................................................................................... F-25
4.3.3 CPU board (CPUB) ......................................................................................................................................................F-26
4.3.4 DC power supply (DCPS).............................................................................................................................................F-28
4.3.5 Backup board (ERB).....................................................................................................................................................F-30
4.3.6 TPM board (TPMB) ......................................................................................................................................................F-31
4.3.7 High voltage unit (HVPS).............................................................................................................................................. F-32
4.3.8 Machine condition monitor board/Fr (MCMB/Fr) ..........................................................................................................F-33
4.3.9 Machine condition monitor board/Edg (MCMB/Edg) ....................................................................................................F-33
4.3.10 NFC board (NFCB)..................................................................................................................................................... F-34
4.3.11 DF control board (DFCB)............................................................................................................................................ F-35
4.4 Motors....................................................................................................................................................................................F-35
4.4.1 Main motor (M1) ...........................................................................................................................................................F-35
4.4.2 Color motor (M2) ..........................................................................................................................................................F-36
4.4.3 Fusing motor (M3) ........................................................................................................................................................F-36
4.4.4 Toner supply motor/YM (M4), Toner supply motor/CK (M5) ........................................................................................F-36
4.4.5 Tray 1 lift-up motor (M6) ............................................................................................................................................... F-37
4.4.6 Document main motor (M8)..........................................................................................................................................F-37
4.4.7 Scanner motor (M9)...................................................................................................................................................... F-38
4.5 Clutches.................................................................................................................................................................................F-39
4.5.1 Bypass tray paper feed clutch (CL2) ............................................................................................................................F-39
4.5.2 Tray 1 paper feed clutch (CL3).....................................................................................................................................F-40
4.5.3 Registration clutch (CL4) .............................................................................................................................................. F-40
4.5.4 ADU transport clutch (CL5) ..........................................................................................................................................F-41
4.5.5 ADU feed clutch (CL6)/ADU reversal clutch (CL7).......................................................................................................F-41
4.5.6 Document paper feed clutch (CL8)............................................................................................................................... F-42
4.5.7 Document registration clutch (CL9) .............................................................................................................................. F-43
4.6 Fan motor ..............................................................................................................................................................................F-44
4.6.1 Machine cooling fan (FM1) ........................................................................................................................................... F-44
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