Standard Procedures
1-22 Printer and Troubleshooting Overview June 1999
Installing the Interlock By-pass Tool
The interlock by-pass tool overrides the cover interlock switches, allowing you to operate
the printer with the covers open. The interlock by-pass tool is a white plastic, “V”-shaped
tool with two finger pads. To use the tool, open the cover and locate the interlock switch
(for locations, see illustrations beginning page 1-11). Squeeze the tool between thumb and
fore finger and insert it into the interlock switch.
The printer ships with two spare interlock by-pass tools concealed behind the right cover.
Replace them when you are finished using them.
Producing a Developed Image
Producing a developed image helps determine where exactly in the print cycle a problem
may be occurring. To produce a developed image:
1 Open the top cover and install an interlock by-pass tool.
2 Power-on-reset the printer.
3 Run a series of test prints. The directory of the boot device will print, followed by con-
tinuous test patterns.
4 As test patterns print, observe paper moving from the upper paper tray to the paper
timing roller where it pauses briefly.
5 When a sheet of paper begins to move from the paper timing roller, turn off the printer.
6 Remove the photoconductor unit.
7 Examine the photoconductor belt to verify that a developed image was produced.
Producing a Toner Patch
To produce a toner patch:
1 Turn off the printer.
2 Open the top cover and install an interlock by-pass tool.
3 Turn on the printer.
4 Start running test prints using Simplex Print mode. When the leading edge of the first
print enters the fuser unit, remove the interlock by-pass tool.
Do not attempt to close the printer cover while the interlock
bypass tool is in place.
Caution
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