Mita PointSource Ai 3010, Service Manual

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2AR
2-3-6
2-3-4 Engine PCB
TFM
FTH
HUMPCB
MPCB
EPCB
Feedshift unit*
Duplex unit*
Paper feed unit
Developing unit
Drivers
IC1, IC2
and IC4
Drivers
IC6, IC7,
IC10,
IC11
and IC12
Op-amps
IC3,
IC5
and IC9
Motor
driver
IC8
Engine
CPU
IC35
XIOs
IC43
and IC45
Figure 2-3-4 Engine PCB block diagram
The engine PCB (EPCB), which is directly connected to the main PCB (MPCB) via
connectors, serves to interface control signals between the engine CPU IC35 on the
main PCB (MPCB) and each drive system unit.
The control signal from the main PCB (MPCB) controls the drive system units via
drivers IC1, IC2, and IC4, and drivers IC6, IC7, IC10, IC11, and IC12.
The control signal from the main PCB (MPCB) also controls the toner feed motor (TFM)
via the motor driver IC8.
The detection signals from components such as the fixing unit thermistor (FTH) and
humidity sensor PCB (HUMPCB) are sent to the main PCB (MPCB) via operational
amplifiers IC3, IC5 and IC9.