19. Image quality problem
Field Service Ver. 1.0 Jun. 2008
320
T
roubleshooting
A. Initial check items 2
• 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
A02FF4C502DA
Mono color
4 colors
Image
problem
Action
Result
Cause
Next step
Lines, bands
From [Service Mode], select [Test Mode]
o
[Halftone Pattern]
o
[SINGLE]
o
[HYPER]
o
[Gradation]
o
[Density 64]
o
[FWD]
o
[C
o
M
o
Y
o
K], and produce a test print. Is
image problem evident in each of all four col-
ors?
YES
Printer,
4 colors
P.350
NO
Printer,
single color
P.336
d-Color MF201
Service Manual Y109660-1
