Pickup-drive assembly ..................................................................................................... 129 Laser/scanner assembly .................................................................................................. 138 Main fan ........................................................................................................................... 142 Printed circuit assemblies (PCAs) .................................................................................................... 144 Low-voltage power-supply PCA .......................................................................................
144 DC controller PCA ........................................................................................................... 148 High-voltage power supply .............................................................................................. 150 Memory-controller PCA ................................................................................................... 152 Driver PCA ....................................................................................................................... 154 Control panel ...................................................................................................................
156 Pickup-and-feed driver (relay) PCA ................................................................................. 158 Sensors ............................................................................................................................................ 160 Temperature sensor ........................................................................................................ 160 Paper and registration sensor covers .............................................................................. 161 Cartridge-sensor PCA ......................................................................................................
162 500-sheet feeder .............................................................................................................................. 165 500-sheet feeder right cover ............................................................................................ 165 500-sheet feeder left cover .............................................................................................. 167 500-sheet feeder rear cover ............................................................................................ 170 500-sheet feeder driver PCA ...........................................................................................
172 6 Troubleshooting Troubleshooting process .................................................................................................................. 176 Pre-troubleshooting checklist .......................................................................................... 176 Troubleshooting flowchart ................................................................................................ 178 Power-on checks ............................................................................................................. 179 Control-panel messages ..................................................................................................................
180 Event-log messages ......................................................................................................................... 193 Jams ................................................................................................................................................. 194 Common causes of jams ................................................................................................. 194 Clearing jams ...................................................................................................................
195 Image defects ................................................................................................................................... 207 Light image ...................................................................................................................... 208 Light color ........................................................................................................................ 208 Dark image ...................................................................................................................... 209 Dark color ........................................................................................................................
209 Completely blank image .................................................................................................. 210 All black or solid color ...................................................................................................... 210 Dots in vertical lines ......................................................................................................... 210 Dirt on back of paper ....................................................................................................... 210 Dirt on front of paper ........................................................................................................
211 Vertical lines ................................................................................................................... 211 White vertical lines ........................................................................................................... 211 Horizontal line .................................................................................................................. 212 White horizontal line ........................................................................................................ 212 Color missing ..................................................................................................................
213 Blank spots ...................................................................................................................... 213 Poor fusing ....................................................................................................................... 213 Image distortion ............................................................................................................... 214 Color misregistration ........................................................................................................ 214 ENWW vii