Others; P-Cover Open Sensor; Rear Cover Sensor; Circuit Board Layout - Epson Stylus Pro 4400 Service Manual

EPSON Stylus Pro 4400/4450/4800/4880/4880C

2.2.8 Others

P-COVER OPEN SENSOR

This sensor is mounted at the Printer Cover right side open/close components
to detect the open or closed condition of the Printer Cover.
Dtecting open/closed status of the cover causes the CR Motor and PF Motor
circuits to stop/operate the motors.

REAR COVER SENSOR

This sensor is mounted at the printer right rear side to detect the removed/
installed condition of the Paper Guide Unit.
Detecting installed/uninstalled status of the unit causes the CR Motor and PF
Motor circuits to stop/operate the motors.

CIRCUIT BOARD LAYOUT

A Panel Unit is mounted to the printer front right surface, and an AC Inlet,
Power Supply Circuit Board and MAIN Circuit Board are mounted in a rear
surface compartment.
Operating Principles
Rear Cover Sensor
Power Supply
Circuit Board
Printer Mechanism Components
Figure 2-60. Cover Sensor/Panel Unit
AC Inlet
Figure 2-61. Circuit Board Layout
Revision C
P-Cover Open Sensor
Panel Unit
MAIN Circuit
Board
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