Filter
Top Products
(3) Operation
a. Block diagram
b. Operation
* The main motor is a 4-phase stepping motor of 2-phase excite-
ment bipolar system, which serves as the drive source of the paper
feed and transport system.
* The pickup solenoid operates on 24V and turns ON/OFF paper
feed operation.
* The following sensors are used.
Paper empty sensor (transmission photo transistor):
It is installed on the LSU PWB and is used to detect whether there is
paper in the paper feed tray or not.
Paper entry sensor (Transmission photo transistor):
This sensor is used to detect the paper feed timing of next paper (in
pre-feed) and to make synchronization between paper transport and
image forming on the drum. It is also used to detect a paper jam.
Paper exit sensor (Transmission photo transistor):
This sensor is used to detect that paper is discharged.
It is also used to detect a paper jam.
* Paper release lever
The paper release lever is used to fix or release paper. To release
paper, pull the lever toward you as shown in the figure below. To fix
paper, push the lever forward. The lever mechanism is as shown
below.
PUS
MEN
ASIC
(IC8)
MCU(PCU)PWB
MMT0
MMT1
CPU
(IC5)
1
2
3
4
MA
MA-
MB
MB-
CN804
1
2
3
+5V
POUT
GND
+24V
CN805
1
2
+24V
PUS
PD801
+5V
PIN
PD802
+5V
POUT-
CN7
9PE
CN9
PE
LSU PWB
+24V
9PE
PD601
CN601
High voltage power PWB
Paper pickup
solenoid
Main motor
Paper feed
roller
Paper entry
roller
Paper exit
roller
Paper empty
roller
Motor
driver
(Paper release)
(Paper fixed)
1 – 7