3.2 Screws used in the printer ……………………………………… 3-2
3.3 Left / Right cover ………………………………………………… 3-3
3.4 Scanner unit ……………………………………………………… 3-4
3.4.1 OPE unit ……………………………………………………… 3-5
3.4.2 CIS unit ……………………………………………………… 3-6
3.4.3 Scan motor …………………………………………………… 3-7
3.5 Middle cover and COVER-OPEN ……………………………… 3-9
3.6 Front and Rear cover …………………………………………… 3-10
3.7 Main PBA ………………………………………………………… 3-10
3.8 SMPS / HVPS board …………………………………………… 3-11
3.9 Fuser unit ………………………………………………………… 3-12
3.10 LSU ……………………………………………………………… 3-13
3.11 Drive unit ………………………………………………………… 3-14
3.12 Step motor ……………………………………………………… 3-15
3.13 Pick up roller …………………………………………………… 3-16
3.14 Transfer roller …………………………………………………… 3-17
4.1 Alignment and Adjustments ……………………………………… 4-1
4.1.1 Control Panel ………………………………………………… 4-1
4.1.2 Understanding the status LED …………………………… 4-2
4.1.3 JAM Removal ……………………………………………… 4-3
4.1.4 EDC mode …………………………………………………… 4-6
4.1.5 Tech mode …………………………………………………… 4-9
4.1.6 Upgrade Firmware ………………………………………… 4-17
4.1.7 Periodic Defective Image …………………………………… 4-21
4.2 Troubleshooting…………………………………………………… 4-22
4.2.1 Procedure of Checking the Symptoms …………………… 4-22
4.2.2 Error code and troubleshooting …………………………… 4-23
4.2.3 Printing quality problems …………………………………… 4-44
4.2.4 Copy Problems ……………………………………………… 4-58
4.2.5 Scan problems ……………………………………………… 4-62
4.2.6 Other errors ………………………………………………… 4-64
chapter 4 Alignment and Troubleshooting
Contents