Xerox Phaser 7400 Service Manual

Error Messages and Codes 3-165
Failure in the [C][M][Y][K] Imaging Unit Drum or Motor
The Drum Phase Sensor integrated on the Imaging Unit Sensor Board indicates an
error in one of the Imaging Units.
Applicable Status Codes:
Code 920: The Yellow Imaging Unit drum is not rotating.
Code 921: The Magenta Imaging Unit drum is not rotating.
Code 922: The Cyan Imaging Unit drum is not rotating.
Code 923: The Black Imaging Unit drum is not rotating.
Initial Actions:
■ Reseat the affected Imaging Unit
■ Cycle the printer's power.
■ If the problem persists follow the procedure below.
5
Check the LVPS +24 V output.
1. Close the Interlock Switches.
2. Disconnect CN2.
Is there +24 V at CN2-1 and <=> ground?
Go to Step 6. Replace the LVPS
(
page 8-121).
6
Check all pins of the DRV1 harness for
continuity.
Disconnect the DRV1 ribbon cable.
Is the cable conductive?
Replace the Engine
Control Board
(
page 8-112).
Replace the DRV1
Harness.
Troubleshooting Reference Table
Applicable Parts Wiring and Plug/Jack References
■ Imaging Unit Motors, PL2.1.8
■ Imaging Unit Sensor Board, PL5.1.20
■ LVPS, PL3.1.1
■ Motor Driver Board, PL2.1.10
■ Print Engine Map 5 (page 10-8)
■ Print Engine Map 6 (page 10-9)
■ Print Engine Map 8 (page 10-11)
■ Print Engine Motor Driver Board (3/6) (page 10-33)
■ Print Engine Imaging Unit Sensor Board (page 10-41)
Troubleshooting Procedure Table (Continued)
Step Actions and Questions Yes No

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