3.3 Disassembly procedure ………………………………………… 3-33.3.1 Cover ………………………………………………………… 3-33.3.2 Scanner Assy ………………………………………………… 3-53.3.2.1 OPE board ……………………………………………… 3-63.3.2.2 CIS Unit ………………………………………………… 3-73.3.2.3 Scan Motor ……………………………………………… 3-83.3.2.4 Home Position Sensor ………………………………… 3-83.3.3 DADF Unit (SCX-563xFR / 563xHR / 573xFW) ………… 3-93.3.3.1 DADF Pick up unit ……………………………………… 3-93.3.3.2 DADF board …………………………………………… 3-103.3.3.3 DADF Motor …………………………………………… 3-113.3.4 ADF Unit (SCX-483xFR/FD/HD)) ………………………… 3-133.3.4.1 Tray Input ……………………………………………… 3-133.3.4.2 Front / Rear cover ……………………………………… 3-143.3.4.3 Paper Path Assy ……………………………………… 3-143.3.4.4 ADF Pick up unit ……………………………………… 3-153.3.4.5 ADF Motor ……………………………………………… 3-153.3.5 Middle Cover ………………………………………………… 3-163.3.6 Main board …………………………………………………… 3-173.3.7 HVPS board ………………………………………………… 3-173.3.8 SMPS board ………………………………………………… 3-183.3.9 Laser Scanning Unit (LSU) ………………………………… 3-183.3.10 Fuser unit …………………………………………………… 3-193.3.11 Main drive unit ……………………………………………… 3-203.3.12 Feed drive unit……………………………………………… 3-213.3.13 Pick up/ Regi/ MP clutch ………………………………… 3-213.3.14 Pick up roller ……………………………………………… 3-223.3.15 Transfer roller ……………………………………………… 3-223.3.16 MP unit ……………………………………………………… 3-233.3.17 Bin-full sensor ……………………………………………… 3-233.3.18 Regi. / Feed / Empty sensor ……………………………… 3-243.3.19 Cassette roller (Retard roller) …………………………… 3-25Contents