6
Troubleshooting
This chapter provides information about the following topics.
Basic troubleshooting
............................................................................................................
161
Control-panel messages
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166
Alert and warning messages
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166
Critical error messages
...................................................................................................
174
Event-log codes
.....................................................................................................................
177
Solving image-quality problems
............................................................................................
179
Checking the print cartridge
............................................................................................
179
Solving print image-quality problems
.............................................................................
179
Solving scanning (copying) image-quality problems
......................................................
188
Repetitive image-defect ruler
................................................................................................
194
Solving paper-feed problems
................................................................................................
195
Jams occur in the printer
.................................................................................................
195
Solving print paper-feed problems
.................................................................................
197
Jams occur in the automatic document feeder (ADF)
.....................................................
199
Solving scanner (copier) paper-feed problems
..............................................................
202
Solving problems with digital subscriber line (DSL) connections
..........................................
204
Connecting additional devices
...............................................................................................
205
Dedicated fax line
............................................................................................................
205
Shared phone line
...........................................................................................................
205
To connect additional devices
.........................................................................................
205
Functional checks
.................................................................................................................
208
Engine test
......................................................................................................................
208
Control-panel check
.........................................................................................................
208
Half self-test functional check
.........................................................................................
209
Drum-rotation functional check
......................................................................................
210
Heating-element check
...................................................................................................
210
High-voltage power-supply check
..................................................................................
211
Paper-path check
...........................................................................................................
213
Updating or recovering the firmware code
............................................................................
215
Firmware update by using flash executable
...................................................................
215
Firmware-recovery DIMM
...............................................................................................
215
Troubleshooting tools
............................................................................................................
217
Printing a configuration report, demonstration page, or menu structure
........................
217
Printing all fax reports at once
........................................................................................
217
T.30 protocol trace
..........................................................................................................
217
Service-mode functions
.........................................................................................................
238
Secondary service menu
................................................................................................
238
Developer’s menu
...........................................................................................................
239
Adjusting the country/region code parameters
................................................................
240
Soft reset
.........................................................................................................................
241
NVRAM init
.....................................................................................................................
241
Printer job language (PJL) software commands
............................................................
242
System settings for localized products
..................................................................................
243
Main wiring
............................................................................................................................
245
Locations of connectors
........................................................................................................
247
ENWW
159