Xerox DOCUPRINT N4525 Service Quick Reference Manual page 55

Repair Analysis Procedures assume there is no malfunction in the
Note
System Controller Board. If you are unable to fix a problem using
the Repair Analysis Procedures, it is recommended that you
replace the System Controller board. In some instances, the
Control Panel Display may not be sufficiently functional to
accurately show error codes and/or messages. Before replacing
the System Controller, please refer to the System Controller Error
Code Table on page 1-44 to check the LED blink codes for
additional help in troubleshooting.
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 the Diagnostics, Test Prints, Service Tests and NVRAM
Adjustments section of this manual, on page 1-149 for details.
Volume 1 / Print Engine - Error Codes & Messages 1-33