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.

Caution

Do not attempt to close the printer cover while the interlock bypass tool is in place.

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:

1Open the top cover and install an interlock by-pass tool.

2Power-on-reset the printer.

3Run a series of test prints. The directory of the boot device will print, followed by con- tinuous test patterns.

4As test patterns print, observe paper moving from the upper paper tray to the paper timing roller where it pauses briefly.

5When a sheet of paper begins to move from the paper timing roller, turn off the printer.

6Remove the photoconductor unit.

7Examine the photoconductor belt to verify that a developed image was produced.

Producing a Toner Patch

To produce a toner patch:

1Turn off the printer.

2Open the top cover and install an interlock by-pass tool.

3Turn on the printer.

4Start 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.

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Printer and Troubleshooting Overview