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3.
FUNCTIONS OF THE MAIN PARTS
The main parts are briefly described and illustrated as follows. In order to remain consistent with the parts list, parts are
divided into the following five sections based on their type.
1
Covers
2
Feeder & Drive
3
Fuser & Paper Exit
4
Photographics & ROS
5
Electrical
3.1 Covers
This consists of the printer, four covers and two trays.
(Refer to Chapter 6, Parts List)
3.2 Feeder & Drive
• Input Tray Assembly
Regular (cut sheet) paper, envelopes can be fed into the printer from this tray.
Slide the left and right paper guides to hold the paper in place.
• Feed Roller Assembly
This assembly consists of the feed roller and the feed clutch. After the spring clutch in the feed clutch has been set by
the movement of the feed solenoid, the feed roller assembly rotates driven by the drive assembly and the feed rollers
feed the paper into the printer from the input tray assembly.
One full rotation of the feed roller assembly causes the spring clutch to be released by the feed solenoid and disables
the drive assembly from transmitting a driving signal.
• Feed Solenoid
The feed solenoid controls the operations (rotation and stop) of the feed roller assembly.
• Pre-regi. Sensor
This sensor detects whether paper is sent by the paper set lever based on changes in the position of the regi. actuator
and sends a signal to the MCU PWB.
• MCU PWB
The MCU PWB controls the regi. solenoid, rotates the feed roller assembly and feeds the paper into the printer with
the paper set lever. After receiving the signal from the regi. sensor, the MCU PWB instructs the EP toner cartridge to
generate the image.
(Refer to section 3.5 Electrical System. Illustrations of the parts described above are shown in Chapter 6, Parts List
PL5.)
• Drive Assembly
The drive assembly consists of the main motor and the gear that transmits the driving force. This assembly transmits
a driving force by rotating the main motor.
– 15 –
THEORY OF OPERATION
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