Tools for troubleshooting: Engine diagnostics
The printer contains extensive internal engine diagnostics that help in troubleshooting print quality, paper
path, noise, assembly, and timing issues.
Engine test button
To verify that the printer engine is functioning, print an engine test page. Use a small pointed object to
depress the test-page switch located on the rear side of the printer. The test page should have a series of lines
that are parallel to the short end of the page. The test page can use only Tray 2 as the paper source, so make
sure that paper is loaded in Tray 2.
NOTE: Depressing, and holding down, the test-page switch causes the printer to continually print test
pages. Releasing the switch stops the test page continuous printing.
TIP: Depending on the printer model, the engine test button is located on the right side or rear side of the
printer.
Figure 2-47 Engine test button (1 of 2)
144 Chapter 2 Solve problems ENWW
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