Service manual

180 Troubleshooting ENWW
Troubleshooting process
Preliminary operating checks
Make sure that the following conditions are met before troubleshooting a specific printer problem:
● The printer is plugged in and power is delivered to the outlet as specified on the power rating
label. (See figure 2 on page 19 for a sample identification label and see page 20 for power
specifications.)
● The selected tray contains media that has been correctly loaded. (See the getting started
guide for information about loading trays.)
● The print cartridge is installed correctly. (See the getting started guide for information about
installing print cartridges.)
● The printer is receiving maintenance on a regular basis. (See chapter 4 for information about
maintaining the printer.)
● Any I/O devices are correctly installed. (See the getting started guide for information about
setting up the printer.)
● The customer is using acceptable print media. (See chapter 1 for information about media.)
● The printer is positioned on a solid, level surface. (See the getting started guide for
information about setting up the printer.)
● The line voltage does not vary more than 10 percent from the nominal rated value specified
on the power rating label. (See figure 2 on page 19 for a sample identification label and see
page 20 for power specifications.)
● The operating environment for the printer is within the temperature and humidity
specifications. (See page 21 for information about the operating environment.)
● The printer is never exposed to ammonia fumes such as those produced by diazo copiers or
office cleaning materials. (See the getting started guide for information about setting up the
printer.)
● The printer is not exposed to direct sunlight. (See the getting started guide for information
about setting up the printer.)
● Non-HP components (such as refilled print cartridges, font cartridges, and memory boards)
are removed from the printer.
Note Sudden changes in the printer’s environment can cause image defects and media-handling
problems. Always make sure the printer is not exposed to direct sunlight or to heating or cooling
vents. Allow time for the printer and media to acclimate whenever changing environments (for
example, moving from a cold environment to a warm one). Acclimation can take anywhere from 3
to 24 hours depending on the ambient conditions.
Basic fault isolation
The troubleshooting process is a systematic approach that first addresses the major problems
first and then other problems to discover the causes for printer malfunctions and errors. The
"Troubleshooting process flow" page 182 illustrates the major steps for troubleshooting the
printing system. Each heading depicts a major troubleshooting step. A “YES” answer to the
questions allows troubleshooting to proceed to the next major step.
A “NO” answer indicates that additional testing and correction is needed. Proceed to the
referenced location in the chapter and follow the directions there. After completing the additional
testing and correcting the problem, proceed to the next major step.
Note It is important to always follow this process in sequence. Failure to do so can result in increased
repair time, difficulty, and expense.