Table of contents
Product information.....................................................................................2
Edition notice...............................................................................................2
Notices and safety information..................................................................11
Laser notices............................................................................................................................................11
Safety.......................................................................................................................................................14
Preface.......................................................................................................17
Service manual conventions....................................................................................................................17
Change history.........................................................................................................................................17
General information...................................................................................19
Media guidelines.....................................................................................................................................19
Characteristics that affect print quality ............................................................................................................19
Unacceptable paper..........................................................................................................................................20
Selecting paper ................................................................................................................................................. 21
Selecting preprinted forms and letterhead ......................................................................................................21
Using recycled paper and other office papers .................................................................................................. 21
Storing paper ....................................................................................................................................................22
Data security notice.................................................................................................................................22
Tools required for service........................................................................................................................23
Diagnostic information...............................................................................25
Troubleshooting overview.......................................................................................................................25
Performing the initial troubleshooting check ...................................................................................................25
Error code number key .....................................................................................................................................26
Power‑on Reset (POR) sequence.............................................................................................................26
Using Safe Mode.....................................................................................................................................27
Fixing print quality issues........................................................................................................................27
Initial print quality check ..................................................................................................................................28
Print quality toner rubs off service check .........................................................................................................29
Print quality background service check ............................................................................................................30
Print quality blank page service check..............................................................................................................31
Print quality blurred or fuzzy print service check ............................................................................................. 32
Print quality half‑color page service check ....................................................................................................... 33
Print quality horizontal banding service check .................................................................................................33
Print quality horizontal line service check ........................................................................................................33
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