Analyzing Test Prints - Xerox 5400N - Phaser B/W Laser Printer Service Quick Reference Manual

Analyzing Test Prints

Test prints provide several uses in troubleshooting printer problems.
Isolating problems to either the Print Engine Controller Board or to the
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System Controller Board and host software.
Locating feed and paper transport problems.
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Detecting print-quality and image registration problems.
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Note: Always check Fault History and appropriate RAPs before
initiating additional tests or investigations.
Using Test Prints to Isolate a Problem to the Print Engine
Controller Board or the System Controller Board
1. Print a sample image from the host computer.
2. Enter Printer Diagnostics and generate a Print Engine Controller Board test print.
3. Compare both prints.
4. If the problem occurs when you print from the host computer but does not occur
when you print from Diagnostics, the problem may be in the System Controller
Board, in the print driver software, or in the application software on the host
computer.
5. If the problem occurs when you print a test print, then the problem is in the print
engine.
Note: If a Test Print image is not centered on the page or has
uneven borders, refer to Registration on
print is centered but the host computer's image is not
centered properly, a software correction must be made at the
host computer by adjusting margins, page size, etc.
Using Test Prints to Locate a Feed or Paper Transport Problem
Test prints may help you locate a problem with paper feed or with paper
transportation along the paper path.
1. Enter Printer Diagnostics and generate a test print from every input tray, using
Duplex (if installed) and outputting to all output trays.
2. Follow the paper along the paper path to locate the cause of the problem.
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page 231. If the Test
Phaser 5400 Laser Printer Service Guide