Image Quality Problem; How To Identify Problematic Part - Konica Minolta bizhub C35 Service Manual

DRAFT
Field Service Ver. 1.0 Feb. 2010

16. IMAGE QUALITY PROBLEM

16.1 How to identify problematic part

• This chapter is divided into two parts: "Initial check items" and "Troubleshooting proce-
dure by a particular image quality problem."
• When an image quality problem occurs, first go through the "Initial check items" and, if
the cause is yet to be identified, go to "Troubleshooting procedure by a particular image
quality problem."
16.1.1 Initial check items
A. Initial check items 1
• Let the machine produce a test print and determine whether the image problem is attrib-
utable to the scanner or printer system.
• Evaluation procedure
From [Service Mode], select [Print Menu] → [Gradation],
and produce a test print. Is image problem evident?
B. Initial check items 3
• If the printer is responsible for the image problem, let the machine produce a test print
and determine whether the image problem occurs in a specific single color or four colors
• Evaluation procedure
From [Service Mode], select [Print Menu] → [Gradation],
and produce a test print. Is image problem evident in each
of all four colors?
Action
Action
16. IMAGE QUALITY PROBLEM
Result Cause
YES Printer Initial check items 2
NO Scanner P.224
Result Cause
YES Printer, P.247
4 colors
NO Printer, P.235
single color
Next step
Next step
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