Image Quality Problem; Troubleshooting Image Quality Problems; How To Identify Problematic Part; Initial Check Items - Konica Minolta bizhub 160 Service Manual

22. Image quality problem

22. Image quality problem

22.1 Troubleshooting Image Quality Problems

• This chapter is divided into two parts: "Initial Checks" and "Troubleshooting for Specific
Image Quality Problems".
• If an image quality problem occurs, first go through the "Initial Checks" and, if the cause
is still not identified, continue to "Troubleshooting for Specific Image Quality Problems".

22.2 How to Identify Problematic Part

22.2.1

Initial Check Items

• Determine if the failure is attributable to a basic cause or causes.
Section Step
Installation 1 The installation size complies with the
site requirements specified in "PRECAUTIONS
FOR INSTALLATION" contained in the
"GENERAL" section.
Paper 2 The paper meets product specifications.
3 The paper is damp.
Original 4 The document is not flat.
document
5 Copies of a faint document (written in light
pencil, etc.) are being made.
6 Copies of a highly transparent document
(OHP film, etc.) are being made.
7 The Original Glass is dirty or scratched.
PM parts 8 PM parts relating to image formation have
reached the end of cleaning/replacement
cycles.
Adjustments 9 There are adjustments that can improve
image quality problems by being performed
again.
256
Field Service Ver. 1.0 Apr. 2005
Check Result Action
NO Change the installation
site.
NO Instruct the user to use
recommended paper that
meets product specifica-
tions.
YES Change the paper.
Instruct the user on the
correct methods for stor-
ing paper.
YES Correct the document.
YES Instruct the user to use a
document with an appro-
priate image density.
YES Instruct the user on how
to copy transparent doc-
uments.
YES Clean or replace the
Original Glass.
YES Clean or replace the PM
parts.
YES Perform the adjustment
again.