Xerox Phaser 7300B, Service Manual

Page: 261 / 277

Theory of Operation 8-245
3.
Engine Controller Board - The engine controller board synchronizes the print
process by controlling the LED head assemblies, motors, fans, sensors, solenoids,
clutches and fuser temperatures. The engine controller board also controls the
voltages to the imaging units and the print speed to compensate for changes in
media and environmental conditions. The engine controller board contains:
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EEPROM
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Fuses - See “Engine Controller Board Connectors” on page 8-246
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Connectors - See “Engine Controller Board Connectors” on page 8-246
4.
Toner Sensor Board -
5. Low Voltage Power Supply
6.
High Voltage Power Supply
7. Entrance Sensor Board - contains the following sensors:
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Transfer belt entrance sensor
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Registration entrance sensor
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MPT entrance sensor
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Waste toner full sensor
8.
Paper Size Sensor Board - The position of a multi-slotted plate, at the rear of the
paper tray, is set according to the position of the tray’s paper guides. Upon
insertion of the tray in the printer, the plate’s four rows activate four switches on
the paper size sensor board. The combinations of the slot positions indicate to the
paper size sensor board, the size of the paper in the tray.
9. Imaging Unit Sensor Board