Sensor Location And Function - Xerox 7300B - Phaser Color Laser Printer Service Manual

Sensor Location and Function

No. Sensor
1.
MPT Entrance Sensor
2.
OHP Sensor
3.
MPT Empty Sensor
4.
Black Toner Cartridge Sensor
5.
Y Yellow Toner Cartridge Sensor
6.
Magenta Toner Cartridge Sensor
7.
Cyan Toner Cartridge Sensor
8.
Top Side Output (Face-Up) Sensor
9.
Stack Full Sensor
10.
Exit Sensor
11.
ADC Sensor (Color Registration
Assembly)
12.
ATS Sensor
13.
Temp/Humidity Sensor Board
14.
Transfer Belt Entrance Sensor
15.
Registration Sensor
16.
Entrance Sensor
17.
Waste Toner Full Sensor
18.
Tray 1 Paper Empty
19.
Tray 1 Low Paper
20.
Door A Open Switch (Interlock)
21.
Top Cover Open Switch
Theory of Operation
Function
Detects incoming paper to determine the timing for
switching from hopper to carriage.
Detects the presence or absence of transparency
media.
Detects paper present in the MPT.
Detects full, low, and empty state of toner
Detects paper exit to determine the timing for job
offset operation.
Detects the height of the stack of prints in the
Face-up tray (top output).
Detects the leading and trailing edges of media and
determines whether the paper has exited the
printer.
Measures the density pattern printed on the transfer
belt.
Adjusts the fuser temperature according to the
thickness of media loaded in the tray.
This only functions when the front panel media type
is set to plain or letterhead.
Measures the printer's temperature and relative
humidity in order to calculate the optimal transfer
voltage under the current environmental conditions.
Detects the beginning of media transfer and based
on the time it takes to for the leading edge to reach
the sensors, determines media length.
Determines job offset.
Determines movement of media through the printer.
Detects a full state of waste toner in the transfer
belt waste toner bin.
Detects the absence of media in the tray.
Detects a low condition of media loaded in the tray.
Detects a right door open condition and shuts off
the +34 volt supply.
Detects a top cover open condition and shuts off
the +34 volt supply.
cartridges.
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