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2-3 Operation of the PWBs
2-3-1
Main PWB
The diagram below shows the main PWB and the components of the bulk paper feeder.
Printer
Paper feed
motor
YC3
Motor
driver
Over
current
detection
circuit
YC1
Printer base
Figure 2-3-1Main PWB block diagram
Cover
interlock
switch
Tray
elevation
motor
YC4
YC6
OP3.3V
Transistor
circuit
CPU
2-3-1
Tray top
position
sensor
YC5
Tray
bottom
position
sensor
YC7
Paper
feed
sensor
YC2
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