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.

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DocuPrint N4525 Network Laser Printer

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

N4525 specifications

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