General Information
Xerox Internal Use Only Phaser 3330 and WorkCentre 3335/3345
Service Manual
1-31
Electrical
The electrical system consists of the Main PWB, Control Panel Board, HVPS, SMPS, Power Switch
Assembly, ADF/DADF Board, FAX, and Wireless Interface Board.
•Main PWB
The Main PWB controls all modules required to print. This includes the LSU, HVPS, SMPS, FAN,
Fuser, FAX, and Scanner. The controller receives print data from the host through network, USB
Port, fax or Scanner. It takes this information and generates printable video bitmap data. Engine
and video control are combined.
• Control Panel Board - displays the status of the system using LCD Touch Screen Display in response
to user actions or the Main controller.
• HVPS - supplies high voltage for the developing Process. The High Voltage is controlled by the
PWM signal from the CPU.
• SMPS - makes +5V and +24V DC from 220V or 110 AC.
• Power Switch Assembly - controls power to the printer.
• ADF/DADF Board - provides the interface between the ADF/DADF and the Main PWB.
• FAX Board - provides the FAX interface to the printer.
• WLAN Board - the WLAN board provides a wireless Ethernet interface.
Optional Memory
• Optional Memory DIMM for WorkCentre 3345 only
A 256 MB, SO-DIMM Board is available to increase system memory on the Main PWB. Additional
memory is used for operating system, system application programs, and print data storage.
Locations of Phaser 3330 Electrical Components
The following illustration shows the location of electrical components in the Phaser 3330.
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