Xerox Phaser 7400 Service Manual

General Troubleshooting 4-5
POST Hard Fault Messages
POST indicates a hard fault by displaying a message on the Control Panel and
blinking the fault code on the health and Control Panel LEDs. There are long and
short blinks. A long blink is worth 5 and a short blink is worth 1. As an example, a
blink pattern flashed as long, long, short, short, represents fault code 5+5+1+1=12,
indicating a failure in the CPU interrupt test. Along with the blinking LEDs, the failed
test also displays as:
POWER ON SELF TEST ERROR
12:CPU INTERRUPTS
CALL SERVICE
The exception to this reporting scheme is a RAM test error. The Boot Loader executes
a RAM test prior to loading POST. If the Boot Loader encounters a RAM error, POST
does not load.
Hard Error LED Blink Patterns and Messages
LED Blink
Pattern
Control Panel
Message
Action
1 RAM ERROR No RAM present, or faulty RAM. Alternate 1/2 second
interval blink at Control Panel and Health LEDs if the
controller has initialized the FPGA. Otherwise, only the
Health LED blinks.
1+1 Control Panel disconnected or defective.
5+5 10: EEPROM 1. Switch Off printer power.
2. Remove and re-install the NVRAM EEPROM.
3. Switch On printer power.
4. If the error message persists, replace NVRAM, and then
the Image Processor Board.
5+5+1+1 12: CPU
INTERRUPTS
Replace Image Processor Board (page 8-113).
5+5+5+1 16: Min RAM Add additional RAM memory.

Xerox Phaser 7400 Specifications

General

Color	Yes
Print technology	Laser
Maximum resolution	600 x 1200 DPI
Time to first page (black, normal)	12 s
Print speed (black, normal quality, A4/US Letter)	40 ppm
Print speed (color, normal quality, A4/US Letter)	36 ppm
Storage media	HDD
Internal memory	512 MB
Processor model	PowerPC
Maximum internal memory	1 MB
Internal storage capacity	20 GB
Total input capacity	800 sheets
Maximum input capacity	3000 sheets
Paper tray 2 input capacity	350 sheets
Auto document feeder (ADF) input capacity	1650 sheets
Maximum print size	297 x 420 mm
Paper tray media types	Envelopes, Labels, Transparencies
Non-ISO print media sizes	Executive (184 x 267mm), Folio (media size), Letter (media size), Statement (140 x 216mm), Legal (media size)
Maximum ISO A-series paper size	A3
Power requirements	100-240V, 50/60Hz
Networking features	Fast Ethernet
Supported media weight(s)	270 g/m²
Maximum operating temperature range (T-T)	10 - 32 °C
Certification	FCC p.15 A, CE
Storage temperature (T-T)	-20 - 60 °C
Operating temperature (T-T)	-4 - 140 °F
Storage relative humidity (H-H)	10 - 95 %
Operating relative humidity (H-H)	20 - 80 %
Maximum duty cycle	150000 pages per month

Weight and Dimensions

Dimensions (WxDxH)	1438 x 623 x 975 mm