Lexmark CS720 - Page 4

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 and specialty media guide................................................................................................................. 26
Paper guidelines..........................................................................................................................................................26
Using specialty media................................................................................................................................................ 27
Supported paper sizes, types, and weights......................................................................................................... 29
Data security notice...........................................................................................................................................31
Tools required for service.................................................................................................................................31
Diagnostic information.............................................................................. 33
Troubleshooting overview...............................................................................................................................33
Performing the initial troubleshooting check....................................................................................................... 33
Power‑on reset (POR) sequence............................................................................................................................. 33
Fixing print quality issues................................................................................................................................ 34
Initial print quality check............................................................................................................................................ 34
Toner easily rubs o check....................................................................................................................................... 34
Background or gray background check................................................................................................................ 36
Blank or white pages check ......................................................................................................................................37
Gapping or half color page check .......................................................................................................................... 39
Blurred print or color misalignment check ........................................................................................................... 40
Horizontal colored lines or banding check ........................................................................................................... 41
Text or images cut o check .................................................................................................................................... 43
Mottled print and dots check ................................................................................................................................... 43
Vertical white lines check.......................................................................................................................................... 44
Ghost images check................................................................................................................................................... 46
Solid color or black image check.............................................................................................................................47
Vertical colored lines or banding check................................................................................................................ 48
Image void scan direction check ............................................................................................................................ 49
Image void process direction check ....................................................................................................................... 51
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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