安全信息................................................................................................................................... 21
安全情報................................................................................................................................... 22
安全資訊................................................................................................................................... 22
Preface......................................................................................................... 23
Conventions........................................................................................................................................................23
General caution statements........................................................................................................................... 23
General information................................................................................... 25
Finding the serial number............................................................................................................................... 25
Paper guidelines.......................................................................................................................................................... 26
Using specialty media ................................................................................................................................................ 27
Data security notice........................................................................................................................................... 31
Tools required for service.................................................................................................................................31
Troubleshooting overview...............................................................................................................................33
Power-on reset (POR) sequence............................................................................................................................. 33
Fixing print quality issues................................................................................................................................ 34
Initial print quality check............................................................................................................................................ 34
Toner easily rubs off check ....................................................................................................................................... 34
Blank or white pages check ......................................................................................................................................37
Gapping or half color page check .......................................................................................................................... 39
Text or images cut off check .................................................................................................................................... 43
Mottled print and dots check ................................................................................................................................... 43
Vertical white lines check.......................................................................................................................................... 44
Ghost images check ................................................................................................................................................... 46
Image void scan direction check ............................................................................................................................ 49
Dark print check........................................................................................................................................................... 52
Missing color check .................................................................................................................................................... 53
Uneven print density check...................................................................................................................................... 54
Repeating defects check........................................................................................................................................... 55
Random marks check................................................................................................................................................. 57
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