Xerox 5400N - Phaser B/W Laser Printer, Service Quick Reference Manual

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34 Phaser 5400 Laser Printer Service Guide
Using Printer Diagnostics
Repair Analysis Procedures often ask you to enter Diagnostics and perform a specific
output test or input test. Diagnostics are built into the Print Engine Controller Board.
Use the Control Panel to access and run the various diagnostic routines that are
presented in this manual. Refer to
Diagnostics, Test Prints, Service Tests and NVRAM
Adjustments on page 219 of this manual.
To Enter Diagnostics mode
When troubleshooting, you will encounter times when it is necessary to enter
Diagnostics mode. Please use the following procedure:
1. Make certain the printer is OFF.
2. Press and hold buttons [2] and [6] on the Control Panel while you switch printer
power ON. Continue holding until *IOT?* appears in the display (approximately
20 seconds).
3. When the Control Panel LCD displays *IOT?*, release buttons [2] and [6] , then
press and hold button [4] until the LCD indicates you are in Diagnostics mode.
Note: You have 10 seconds to complete the transition from holding
[2] and [6] to pressing [4]. If you miss this 10 second window,
the printer will complete a normal boot sequence, requiring
you to switch printer power OFF and start over.
4. When attempting to enter certain areas of Diagnostics, a password is required.
When so requested for password, sequentially press
[0], [7], [3], [4] to gain entry.
Note: To exit Diagnostics, you must switch printer power OFF, wait
20 - 30 seconds and switch printer power ON.