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