Xerox WorkCentre 3345 Service Manual

General Information
Xerox Internal Use Only Phaser 3330 and WorkCentre 3335/3345
Service Manual
1-29
Laser Scanning Unit (LSU)
The LSU is the core part of the IOT that converts video data received from the controller into the
electrostatic latent image on the OPC drum, using a modulated laser beam reflected from the rotating
polygon mirror, exposing the main charge on the OPC drum. The OPC drum is rotated at the same rate
as the media feeding speed.
The HSYNC signal is created when the laser beam from the LSU reaches the end of the polygon mirror
face as it rotates, and the signal is sent to the controller, which uses this to synchronize each scan line
the laser makes in the horizontal axis by adjusting the image data sent to the LSU. Each face of the
polygon mirror is used for one scan line on the OPC drum.
s3320-264
Photo Diode
Laser Diode
Driver Circuit
Protector Panel
Laser Diode Motor Driver
Polygon Mirror
OPC Drum
Polygon Motor

Xerox WorkCentre 3345 Specifications

General

Print Technology	Laser
Print Speed	Up to 42 ppm
Print Resolution	Up to 600 x 600 dpi
Automatic Document Feeder	50 sheets
Duplex Printing	Yes
Monthly Duty Cycle	Up to 80, 000 pages
First Page Out Time (Black)	As fast as 6.5 seconds
Processor	600 MHz
Paper Input (Standard)	250 sheets
Paper Output	150 sheets
Scan Resolution (Optical)	Up to 600 x 600 dpi
Fax Speed	33.6 Kbps
Copy Resolution	Up to 600 x 600 dpi
Connectivity	USB, Ethernet, Wi-Fi
Functions	Copy, Print, Scan, Fax, Email
Mobile Printing	Apple AirPrint, Google Cloud Print, Xerox Print Service Plugin for Android, Mopria
Media Sizes Supported	Letter, Legal, A4, A5, B5, A6
Fax Transmission Speed	3 seconds per page
Maximum Paper Size	216 x 356 mm
Copy Speed (Black)	Up to 42 cpm