108 Chapter 6 Troubleshooting C4170-90959
Paper Handling Problems
Print Test Pages
To confirm that the printer can pick and move paper, generate a Self-Test / Configuration
page by depressing the G
O
and J
OB
C
ANCEL
buttons simultaneously when the printer is in a
ready state. If the printer cannot produce a Self-Test / Configuration Page, generate an
Engine Test Page. If an Engine Test page does not print, see “Paper Jam Troubleshooting”
(page 108).
Engine Test
The engine test verifies that the print engine is functioning correctly. It is also useful for
checking and adjusting registration.This test is very useful for isolating printer problems,
because it does not involve the Formatter PCB. The engine test prints a full page of lines
across the entire printable area.
See “Microswitch Control” (page 80) for instructions on performing an engine test.
NOTE: Ensure that the Toner Cartridge is installed in the printer. Also, the print motor must be
stationary and the printer must be in the standby mode.
In order for an engine test print to be produced, paper must be loaded in the printer. The
system checks for paper first in Tray 2, then Tray 1, and then in the optional Tray 3. Paper is
pulled from the first tray containing paper.
Self-Test / Configuration Page
Use the Configuration Page to view the current printer settings, to help troubleshoot printer
problems, or to verify installation of optional accessories, such as memory (DIMMs),
JetDirect cards, and printer languages.
NOTE: If Status Log information is present, it will print in the Status area of the Configuration Page.
If an HP JetDirect print server EIO card is installed, a JetDirect Configuration Page will also
be generated.
See “Printing Self-Test/Configuration Page” (page 48) for a sample page.
Paper Jam Troubleshooting
Paper jams occur in the printer when paper does not reach or clear a photosensor along the
printer’s paper path in a specific amount of time. The following table contains general
questions and topics to explore prior to troubleshooting.
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