Konica Minolta bizhub C450 Service Manual page 415

18. Image quality problem
C. 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
4 Color
Mono Color
• Evaluation Procedure
Image Prob-
lem
Lines, bands From "Service Mode," select "Test Mode" →
"Halftone Pattern" → "SINGLE" → "HYPER"
→ "Gradation" → "C→M→Y→K" → "Density
64," and produce a test print. Is image prob-
lem evident in each of all four colors?
378
Action
Field Service Ver. 1.0 Mar. 2005
Result Cause
☞ 408
YES Printer,
4 colors
☞ 392
NO Printer,
single color
4037F4C517DA
Next Step