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4.2 Logic Section
4.2.1 Logic section block diagram
Part 4: Technical Reference
4-38
BJC-4400
Figure 4-29 Printer Block Diagram
MPU
Parallel Interface
22.11MHz
Printer Controller
P60 to 63
P90 to 93
A0 to 23
AD0 to 15
A0 to 23
Carriage Motor
ERROR
POWER
Beeper
Transistor
8-Mbit
Control/CG ROM
AD0 to 15
PB0
PB1
P71
P33
A/Data Bus
Address Bus
Paper Feed Motor
BZ
RES
RES
CE
CS0
RESUME
CARTRIDGE
Driver IC
Paper End Sensor
PS1
Pickup Roller Sensor
PS2
P72
P73
A0 to 18
D0 to 15
20MHz
P41
Reset IC
Home Position Sensor
P40
Transistor
PC2 to 3
AD16 to 23
PM
PM
DRAM
4-Mbit
MA0 to 9
MD0 to 15
A0 to 9
DRAM Bus
DO 1 to 16
A0 to 15
MA0 to 9
MD0 to 15
AN0
Temp. Sensor
(TH1)
P87
POWER Switch
P42
P66
INT 0 to 3
EEPROM
P35,36
PB0,PB1
PB4,PB5
BJ Cartridge
Sub-heater
Temperature control
heater
Head temperature
sensor
Rank resistor
Black BJ Cartridge
heater (128 nozzles)
Color BJ Cartridge
heater (136 nozzles)
VHC,CVDC
AN1,3
Driver IC
1 Kbit
PE4 to 7
MCH0
ID0,1
HRES
HCLOCK
HDATA
HLATCH
BENB1 to 3
HENB0 to 3
ODDENB
EVENENB
Scanner Cartridge
(Option)
Scanner controller
CCD
LEDs (R,G,B)
HVH
H VDD
SCLOCK
SDATA
SLATCH
COM 0 to 3
C.CHK
C.CHA
P94
P95
Vcc (+5VDC)
VH (+24.0VDC)
Logic Board
J2
Cartridge
Control
Bi-directional
Interface Control
Control Buttons
Indicators
Indicator Control
Switch Detection
J4
Mechanism
Control
Carriage Motor
Temp.
Sensor
(TH1)
Pick-up
Roller
Sensor
Paper
End
Sensor
J3
Purge Unit
Paper Feed Roller
MECHANISM SECTION
ELECTRICAL SECTION
Sheet
Feeder
J1
Paper Feed Motor
AC Adapter
J5
AC Inlet
BJ Cartridge
Home Position Sensor
Scanner Cartridge (Option)
LEDs
(R,G,B)
CCD
Scanner
Controller
Carriage
Figure 4-28 Logic Board Block Diagram
18


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