Control System - Brother HL-2700CN Service Manual

2.2

Control System

2.2.1 Control of the Print Process
A Micro CPU mounted on the MCTL PCB controls the print processes.
<Print Sequence Diagram>
OPERATION
CONTROLLER
PANEL PU
P.W.B
LCD
PANEL
ASSY
ENGINE
CONTROL G.A.
CPU Sequential Control
Fuser Temperature Control
8bit CPU
Operator Panel Control
Error Clearance Program
Laser Power Control
I/F Control
LDU
PDU
P.W.B P.W.B
SCM
POWER
SWITCH
(1) Control Block Diagram (Refer to Fig.4-32.)
No.
1
2 Temperature Control
3 Consumables' Life Control
4 Operator Panel Control
5 Error Processing Control
6
7
Lower
DM
MM
Feed Unit
MCTL
P.W.B
ERASE
LAMP
EX
FAN
PS
FAN
INTERLOCK
SWITCH PU
LV POWER SUPPLY PU
Name
Sequence Control
Interface Control
Laser Control
DCL
LD Fan FUCL
IOD P.W.B : I/O DRIVER
TES
PBS
WTS OHP
TDS
HV POWER
SUPPLY PU
Fig.4-32
To control the print sequence of printer.
To control the temperature of fuser unit.
To control the toner empty status and the life
of periodic replacement parts.
To control the operator panel indication and
the operation signals.
To sense the errors occurring in the printer
and the stop procedures.
To control the receipt and transmission of the
interface signals from the external controller.
To control the laser scanning and laser
power.
IV-34
RECL FBSOL TRSOL
PCLU
PSU PEU PT2
PT1
TBS PFUL
FUSER UNIT FU
TH
HEATER
Function
PSL
TNK