Lvps; Front Sensor Board; Rear Sensor Board - Xerox Phaser 7400 Service Manual

LVPS

Supplies AC power from the power source to the Fuser heater. Generates and supplies
stable low-voltage DC power (+5 VDC, and +24 VDC) to be used for the logic and
other circuits within the printer. The LVPS includes the LVPS Board with attached
Power Switch, the AC Harness, a Fan, and the box enclosure.
LVPS Outputs
Output Voltage
+5 V (1)
+5 V (2)
+5 V (3)
+24 V

Front Sensor Board

Located under the Registration Roller #1, the Front Sensor Board communicates with
the Motor Driver Board and connects to these components:
Media Thickness Sensor
Registration Clutch #1
Temperature/Humidity Sensor
Tray 1 (MPT) Home Position Sensor
OHP (Transparency) Sensor
Tray 1 (MPT) Level Sensor
Tray 1 (MPT) No Paper Sensor
Mounted directly on the board are the Registration Sensor #1 and Transfer Unit
Entrance Sensor.

Rear Sensor Board

Located behind the Rear Sensor Board Cover on the Exit Assembly, the Rear Sensor
Board communicates with the Engine Control Board and connects to these
components:
Fuser Exit Sensor
Full Stack Sensors for Top and Side Output Trays
Job Offset Position Sensor
Theory of Operation
Purpose
Engine Control Board power
LED Head power
Image Processor Board power
For motor, clutch, and solenoid drive
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