Xerox Phaser 7400 Service Manual

Error Messages and Codes 3-103
Transfer Unit Fan Failure
Applicable Status Code:
Code T40: Transfer Unit Fan Failure
Initial Actions:
■ Cycle the printer's power.
■ If the problem persists follow the procedure below.
Troubleshooting Reference Table
Applicable Parts Wiring and Plug/Jack References
■ Transfer Unit Fan, PL5.1.48
■ Motor Driver Board, PL2.1.10
■ Print Engine Map 5 (page 10-8)
■ Print Engine Map 7 (page 10-10)
■ Print Engine Motor Driver Board (2/6) (page 10-32)
Troubleshooting Procedure Table
Step Actions and Questions Yes No
1
Test the Transfer Unit Fan.
Run the Service Diagnostics Belt Fan test.
Does the Fan operate correctly.
Replace the Engine
Control Board
(
page 8-112).
Go to Step 2.
2
Check the Fan connection.
Is BELTFAN on the Motor Driver Board
securely connected?
Go to Step 3. Connect the Fan.
3
Check for +24 V at the Fan connector.
Disconnect the Fan from BELTFAN.
Is there +24 V between BELTFAN-1 <=>
ground?
Replace the Fan
(
page 8-134).
Go to Step 4.
4
Check for +24 V at the POW24 connector.
Disconnect the POW24 Harness from the
Motor Driver Board.
Is there +24 V between POW24-1 <=>
ground?
Replace the Motor
Driver Board
(
page 8-141).
Go to Step 5.
5
Check continuity of the POW24 Harness.
Is the wiring harness conductive?
Replace the LVPS
(
page 8-121)
Replace the
harness.

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