NEC NEFAX 671, Руководство по обслуживанию

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T-26
6. IMAGE QUALITY PROBLEMS
6-1. 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”.
6-2. Initial Checks
• Determine if the failure is attributable to a basic cause or causes.
Section Step Check Result Action
Installation
site 1 The installation size complies with the
requirements specified in “PRECAU-
TIONS FOR INSTALLATION” con-
tained in the “GENERAL” section. NO Change the instal-
lation site.
Paper 2 The paper meets product specifica-
tions. NO Instruct the user
to use recom-
mended paper
that meets prod-
uct specifications.
3 The paper is damp. YES Change the
paper.
Instruct the user
on the correct
methods for stor-
ing paper.
Original
document 4 The document is not flat. YES Correct the docu-
ment.
5 Copies of a faint document (written in
light pencil, etc.) are being made. YES Instruct the user
to use a docu-
ment with an
appropriate image
density.
6 Copies of a highly transparent docu-
ment (OHP transparencies, etc.) are
being made. YES Instruct the user
on how to copy
transparent docu-
ments.
7 The CIS is dirty. YES Clean the CIS.
PM parts 8 PM parts relating to image formation
have reached the end of cleaning/
replacement cycles. YES Clean or replace
the PM parts.
Adjust-
ments 9 There are adjustments that can
improve image quality problems by
being performed again. YES Perform the
adjustment again.