Xerox Phaser 7400 Service Manual

General Troubleshooting 4-17
DC Power Supply Troubleshooting
RAM Memory Fault Isolation
Image Processor Board RAM memory has failed or is not installed. A minimum of
256 MB of RAM must be installed for proper printer operation. The Phaser 7400
Color Printer supports DDR PC2700 in 200-pin SODIMM form. The printer accepts
modules of 256 or 512 MB in combinations up to the maximum of 1 GB.
Errors appearing on the Startup page:
Hardware Failure: RAM Memory Slot 1 Checksum
Hardware Failure: RAM Memory Slot 2 Checksum
Hardware Failure: RAM Memory Slot 1 Rejected
Hardware Failure: RAM Memory Slot 2 Rejected
Errors appearing on the Control Panel:
Power On Self Test Error 15: RAM DIMM
Power On Self Test Error 16: Minimum RAM Limit
Power On Self Test Error RAM ERROR
Initial Actions:
Check that the RAM devices are making positive contact with their connectors.
1. Power off the printer.
2. Remove and re-install the RAM memory after verifying it meets the Xerox
specifications. See "Memory Specifications" on page 1-13. If the problem
persists, use the following procedure to correct it
Troubleshooting Reference Table
Applicable Parts Wiring and Plug/Jack References
■ LVPS, PL3.1.4 ■ Print Engine LVPS (page 10-39)
Troubleshooting Procedure Table
Step Action and Questions Yes No
1
Perform the AC power supply
troubleshooting procedure.
Does the problem persist?
Go to Step 2. Complete.
2
Check for +24 V at CN2.
Is there +24 V at CN2-1 <=> ground?
Replace the
affected harness..
Replace the LVPS
(
page 8-121).

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