Table 2-8 Troubleshooting flowchart (continued)
5
Print quality
Does the print quality meet the customer's
requirements?
Compare the images with the sample defects in the image defect
tables. See the images defects table in the product service manual.
After the print quality is acceptable, see step 6.Yes
No
6
Interface
Can the customer print successfully from the
host computer?
Verify that all I/O cables are connected correctly and that a valid
IP address is listed on the HP Jetdirect configuration page.
If error messages display on the control panel when trying to print an
event log, see the control-panel message section of the product
troubleshooting service manual.
When the customer can print from the host computer, this is the end of
the troubleshooting process.
Yes. This is the end of
the troubleshooting
process.
No
Power subsystem
Power-on checks
The basic product functions should start up when the product is connected into an electrical outlet and the
power switch is pushed to the on position. If the product does not start, use the information in this section to
isolate and solve the problem.
If the control panel display remains blank, random patterns display, or asterisks remain on the control panel
display, perform power-on checks to find the cause of the problem.
Power-on troubleshooting overview
During normal operation, a cooling fan begins to spin briefly after the product power is turned on. Place a
hand over the vents in the left-side cover, above the formatter. When the fan is correctly operating, air
passing out of the product is felt. Lean close to the product to hear the fan operating. Aso place a hand over
the vents on the right side of the rear cover. If the fan is correctly operating, air being drawn into the product
is felt.
After the fan is operating, the main motor turns on (unless the right or front cover is open, a jam condition is
sensed, or the paper-path sensors are damaged). Visually and audibly determine that the main motor is
turned on.
If the fan and main motor are operating correctly, the next troubleshooting step is to isolate print engine,
formatter, and control panel problems. Perform an engine test. If the formatter is damaged, it might
interfere with the engine test. If the engine-test page does not print, try removing the formatter, and then
performing the engine test again. If the engine test is then successful, the problem is almost certainly with
the formatter, the control panel, or the cable that connects them.
Troubleshooting power on problems
1. Verify that power is available to the product. If the product is plugged into a surge protector or
uniterruptible power supply (UPS), remove it, and then plug the product directly into a known operating
wall receptacle (make sure that the wall receptacle provides the correct voltage and current for the
product).
Unplug any other devices on the same circuit that the product is using.
2. Try another known operating wall receptacle and a different power cord.
ENWW Troubleshooting process 125
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