Basic Operation Outline; Printer Block Diagram; Print Signal Sequence - Canon WS8400 Service Manual

2.1 Basic Operation Outline

2.1.1 Printer Block Diagram

A block diagram of the printer is shown in below.
Carriage unit
Print head position
H sensor
Print head position
L sensor
Registratuion
sensor
Linear encorder
Carrigage cover
sensor
Option PCB
To media take-up unit
Head management
sensor
Maintenance
cartridge
Option cutter unit
Cutter right switch
Cutter left switch
Cutter motor
Ink tank unit
Tank sensor(Bk)
Tank sensor(PC)
Tank sensor(C)
Tank sensor(PM)
Tank sensor(M)
Tank sensor(Y)

2.1.2 Print Signal Sequence

The signal sequence from when the printer receives the print signals until printing starts is shown in Figure.
Carriage relay PCB
J309 J105 J104
J1108 J1107
Head relay PCB
J33
J63
J60 J61
J55 J57
FT
Pressure release
sensor
CR home position
sensor
J74
Cap home
position sensor
J76
Pump home
position sensor
J78
PG position H
sensor
Feed roller
encorder
Feed roller HP
sensor
Ink tank cover
sensor
Valve cam sensor
J86
Media sensor
Engine controller
J110
+3.3V,+5.1V
+26.5V,GND
J1002
To power cord
Power supply
J1003
+26.5V
GND
J124
J204
Pump motor
J127
Cap motor
Valve motor
Upper cover lock
solenoid (L)
J133
Spool clutch
Right cover lock
solenoid
Upper cover lock
solenoid (R)
J137
Suction fan
Mist fan (R)
F-2-1
Option
J1
J3
System
controller
J6
J1
Operation
panel
J89
Upper cover
sensor (L)
J91
Upper cover
sensor (R)
J93
CR motor
J96
Feed motor
Mist fan (L)
Chapter 2
0009-1495
0009-1496
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