Recommended Corrective Action; Power On Led Sequence; Table 120 System Controller Leds - Xerox 5400N - Phaser B/W Laser Printer Service Quick Reference Manual

Recommended Corrective Action

For most of the blink code errors, the System Controller Board should be replaced.
For Hard Disk and DIMM slot errors, the cause of the error could be either the
System Controller Board or the plugged-in accessory. If the blink error points to a
(HD or RAM) component that is not even installed, the System Controller is to blame.
Otherwise, be prepared to replace either component (DIMM or HD and the System
Controller).

Power On LED Sequence

The following LEDs on the System Controller Board aid in identifying faults during
the Power On sequence. The LEDs provide status information in all powered ON
operating modes.

Table 120 System Controller LEDs

LED Location Color Description
Power - CR 6
CR6
Test - CR1 CR 1
Speed CR 4
Link CR 3
RXD CR 2
Phaser 5400 Laser Printer Service Guide
Red Indicates power to the controller. Should stay on when power is
turned on.
Red Indicates that a power on diagnostics failure has occurred when
flashing.
Red ON: 10 Mbit Ethernet
OFF: 100 Mbit Ethernet
Green OFF: Indicates no Ethernet link found
ON: Indicates Ethernet link found
Yellow OFF: Indicates no activity on Ethernet link
ON: Indicates activity on Ethernet link
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