Print Quality Service Checks; Using Diagnostic Test Print; Light (Undertoned) Prints Service Check - Lexmark W812 Service Manual

4022-XXX
Step Actions and Questions
5 The following printer FRUs and areas are associated with this
specific problem. One or more of these FRUs or areas may
have failed partially or completely. If you cannot isolate this
problem using the steps in this service check, replace each
FRU or troubleshoot each area listed below, one at a time, until
you isolate and solve the problem.
• Wiring and connectors linking the FRUs
• LVPS - Go to

Print Quality Service Checks

Using Diagnostic Test Print

Print Quality Service Checks may ask you to generate a Test Print to help isolate the
cause of an image quality problem. Follow the instructions outlined in each service check
to evaluate the Test Print. If the printer can generate a normal Test Print on request, then
the RIP Card Assembly, or the host software, or the interface cable between the printer
and the host computer, are most likely the causes of the image quality problem.
Image Quality Service Checks often ask you to stop the printer at a specific point in the
print cycle; such as "before the paper reaches the Fuser." You may have to use trial and
error until you are able to stop the print cycle at the exact point requested in the service
check.

Light (Undertoned) Prints Service Check

The overall image density is too light. The image may also be unfused due to insufficient
image density.
THE PRINTER DISPLAYS NO ERROR CODE.
Step Actions and Questions
1 PAPER INSPECTION
Inspect the paper loaded in the paper trays.
Is the paper wrinkled, dimpled, or show any sign of having
a high moisture content?
2 TONER CARTRIDGE REPLACEMENT
Install a new Toner Cartridge.
Is the image density normal?
2-18
Service Manual
"LVPS Removal" on page
Yes
4-17.
Yes
Replace with
dry, newly
opened paper
Problem
solved
No
No
Go to step 2
Go to step 3