Xerox 4890 Advanced, Руководство по устранению неисправностей

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Troubleshooting Guide 5-1
5. Optimizing print quality
This chapter discusses methods of checking and improving print
quality.
NOTE: One way to test print quality is to print a sample
document. For information on printing sample documents, refer
to The Guide to Configuring and Managing the System.
Adjusting print quality
The system maintains optimal print quality by monitoring the
print quality while printing. If the print quality would be adversely
affected, the printer automatically runs a Print Quality
Adjustment (PQA) before printing the next document. The printer
also automatically runs a PQA if it has been idle for a period of
time. (The default period is eight hours, but the service
representative can customize the time period.)
When the printer requires a PQA, the printer console displays a
“HOUSING NOT READY” message. It also displays one of two
messages indicating the state of the dry ink housing:
• Ready
• Black or color housing not ready
NOTE: If either the black or the color housing is not ready, the
system runs a PQA before printing the next document, whether
that document is black only or highlight color.
You do not have to wait until the printer automatically runs a
PQA. You can run PQAs routinely so as to limit the number of
printer-requested PQAs.
You can start a PQA anytime. A PQA takes 2 to 20 minutes. If
you use the color housing daily and keep it in a stable
environment, a PQA usually takes 2 to 5 minutes.