iv
6.10 PAPER FEED UNIT (OPTIONAL) ........................................................ 6-23
6.10.1 TRANSPORT ROLLER ............................................................... 6-23
6.10.2 PAPER FEED ROLLER AND PAPER FEED CLUTCH ............... 6-23
6.10.3 CONNECTOR.............................................................................. 6-24
6.11 MULTI-PURPOSE FEEDER (OPTIONAL) ........................................... 6-25
6.11.1 PAPER FEED ROLLER, SEPARATION PAD, PAPER FEED
CLUTCH AND SOLENOID........................................................... 6-25
6.11.2 PCB ............................................................................................. 6-26
6.12 IMAGE ADJUSTMENT ......................................................................... 6-27
6.12.1 OVERVIEW ................................................................................. 6-27
6.12.2 SCANNER PARAMETERS.......................................................... 6-28
6.12.3 PRINTER PARAMETERS............................................................ 6-29
6.12.4 SCANNER VIDEO PROCESSING PARAMETERS..................... 6-31
7. TROUBLESHOOTING................................................................. 7-1
7.1 COPY QUALITY TROUBLESHOOTING .................................................. 7-1
7.1.1 BLANK COPIES............................................................................... 7-2
7.1.2 BLACK COPIES............................................................................... 7-2
7.1.3 DIRTY BACKGROUND ................................................................... 7-3
7.1.4 UNEVEN IMAGE DENSITY ............................................................. 7-4
7.1.5 VERTICAL BLACK LINES ............................................................... 7-5
7.1.6 HORIZONTAL BLACK LINES.......................................................... 7-6
7.1.7 VERTICAL WHITE LINES ............................................................... 7-7
7.1.8 HORIZONTAL WHITE LINES .......................................................... 7-8
7.1.9 BLACK DOTS/SPOTS ..................................................................... 7-9
7.1.10 WHITE SPOTS IN BLACK IMAGE AREAS ................................. 7-10
7.1.11 FAINT COPIES ............................................................................ 7-11
7.1.12 VERTICAL BLACK BAND............................................................ 7-13
7.1.13 UNFUSED COPIES ..................................................................... 7-14
7.1.14 GHOST IMAGE............................................................................ 7-14
7.1.15 TONER ON THE BACK OF THE PRINTER PAPER ................... 7-15
7.1.16 INCORRECTLY ALIGNED OUTPUT ........................................... 7-15
7.1.17 INCORRECTLY ALIGNED OUTPUT/REDUCED IMAGE ........... 7-16
7.2 MECHANICAL PROBLEMS ................................................................... 7-17
7.2.1 ADF/SCANNER ............................................................................. 7-17
7.2.2 PRINTER ....................................................................................... 7-20
7.3 ERROR CODES ..................................................................................... 7-26
7.4 ELECTRICAL COMPONENT DEFECTS................................................ 7-35
7.4.1 DEFECTIVE SENSOR TABLE ...................................................... 7-35
7.4.2 BLOWN FUSE TABLE ................................................................... 7-35
