3 Solve problems ............................................................................................................. 237
Solve problems checklist ....................................................................................................... 238
Menu map .......................................................................................................................... 240
Current settings pages .......................................................................................................... 241
Preboot menu options ........................................................................................................... 242
Troubleshooting process ........................................................................................................ 243
Determine the problem source ................................................................................. 243
Troubleshooting flowchart ....................................................................... 243
Power subsystem ................................................................................................... 244
Power-on checks .................................................................................... 244
Power-on troubleshooting overview ............................................ 244
Tools for troubleshooting ....................................................................................................... 246
Individual component diagnostics ............................................................................ 246
LED diagnostics ...................................................................................... 246
Understand lights on the formatter ............................................. 246
Engine diagnostics ................................................................................. 254
Defeating interlocks ................................................................. 254
Disable cartridge check ........................................................... 256
Engine test button .................................................................... 257
Paper path test ....................................................................................... 258
Paper path sensors test ........................................................................... 258
Manual sensor test ................................................................................. 260
Registration sensor .................................................................. 261
Fuser loop sensors ................................................................... 262
Fuser output sensor .................................................................. 263
Duplexer refeed sensor ............................................................ 264
Output-bin full sensor ............................................................... 265
Fuser pressure-release sensor .................................................... 266
ITB alienation sensor ................................................................ 267
Right- and front-door interlock switches ....................................... 269
Tray/bin manual sensor test ..................................................... 271
Print/stop test ........................................................................................ 279
Component tests ..................................................................................... 280
Compo
nent test (special-mode test) ............................................ 280
Diagrams ............................................................................................................. 282
Block diagrams ...................................................................................... 282
Location of connectors ............................................................................ 284
DC controller PCA ................................................................... 284
Paper feeder driver PCA .......................................................... 285
Plug/jack locations ................................................................................. 286
Locations of major components ................................................................ 286
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