16.2 How To Identify Problematic Part; Initial Check Items - Konica Minolta magicolor 7450 Service Manual

16. Image quality problem

16.2 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."
16.2.1

Initial Check Items

• 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
Mono Color
• Evaluation Procedure
Image
Problem
Lines, bands From [Service Menu], select [DIAGNOSIS
MENU] → [PRINT MENU] → [GRADATION],
and produce a test print. Is image problem
evident in each of all four colors?
214
Action
Field Service Ver. 1.0 May 2006
Result Cause
Printer,
YES P.228
4 colors
Printer,
NO P.215
single color
4 Colors
4039F4C505DA
Next Step