Xerox N4525 Diagnostic LED Flash Sequences, Flash sequence Description and corrective action

Troubleshooting

Diagnostic LED Flash Sequences

When the printer is powered ON, it runs a sequence of self test diagnostics. Some failures are detected in these tests and are identified by a flashing sequence indicated on the system controller diagnostic LED located on the controller board at the rear of the printer.

Flash sequence	Description and corrective action
1 flash —1 second — 1 flash…etc. A System controller CPU fault has occurred.
	■ Contact your Customer Support Center.
2 flashes — 1 second — 2	A Base RAM fault has occurred.
flashes…etc.	■ Contact your Customer Support Center.
3 flashes — 1 second — 3 flashes…etc.	A ROM fault has occurred.
	■ Contact your Customer Support Center.
4 flashes — 1 second — 4 flashes…etc.	An ASIC or timer fault has occurred.
	■ Make sure the controller board is firmly seated.
	■ If the problem is not resolved, contact your Customer
	Support Center.
5 flashes — 1 second — 5 flashes…etc.	A resolution enhancement self-test fault has occurred.
	■ Contact your Customer Support Center.
6 flashes — 1 second — 6 flashes…etc.	A communications ports internal loopback test fault has
	occurred.
	■ Contact your Customer Support Center.
8 flashes —1 second — 8 flashes...etc.	A system controller to print engine fault has occurred.
	■ Make sure the controller board is firmly seated.
	■ If problem is not resolved, contact your Customer Support
	Center.
9 flashes — 1 second — 9 flashes...etc.	A hard disk failure has occurred.
	■ Make sure the hard drive is firmly seated on the controller
	board.
	■ If problem is not resolved, contact your Customer Support
	Center.
10-12 flashes — 1 second — 10-12	A slot DIMM1 - DIMM3 fault has occurred:
flashes…etc.	10 flashes = DIMM1 fault
	11 flashes = DIMM2 fault
	12 flashes = DIMM3 fault
	■ Power OFF the printer, remove and reinstall the DIMM, and
	Power ON the printer.
	■ If still flashing at Power ON, replace the DIMM.
15 flashes — 1 second —15	An image enhancement fault has occurred.
flashes...etc.	■ Contact your Customer Support Center.

16 flashes — 1 second — 16 flashes...etc.

An interface option card failure has occurred.

■Make sure the interface card is firmly seated.

■If problem is not resolved, contact your Customer Support Center.

86 DocuPrint N4525 Network Laser Printer