3HW
2-3-1
The drawer main PCB (DMPCB) is controlled by the engine PCB (EPCB) in the copier, and the engine PCB (EPCB) uses
serial communication to control input and output of each motor, clutch, and switch of the DP through the CPU (U1) equipped
with a function of bidirectional serial/parallel conversion of 8-bit data.
Figure 2-3-1
Drawer main PCB block diagram
2-3-1 Drawer main PCB
DFSW
DPSW
DPWSW
DLCSSW
DPLSW
DMPCB
DDM
DPFCL
DH
DHPCB
Copier
(Upper paper feeder)
Lower paper feeder
Motor Driver
U2
CPU
U1