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BJC-8500
4.2 Logic Section
4.2.1 Logic section block diagram
Parallel Interface
Serial Interface
ERROR Indicator
POWER Indicator
Cover Open Sensor
Buzzer
Transistor
BZ
DRAM (IC601)
16Mbit
A0-A9
D1-D16
A0-A9
D1-D16
DRAM(IC602)
16Mbit
A0-A14
I/O1-I/O8
SRAM(IC503)
256Kbit
Mechanical
Section
Electrical Section
Power
Supply Unit
AC Inlet
Address Bus
Data Bus
CDT0
CAD1
XRESET
Reset IC
to
to
CDT15
CAD23
32MHz
XIN
CKOUT
INKP
LED1
PESNS
LED0
ASFSNS
DRSNS
PGHP
BZZR
DCDIR
DCMON
DCBRK
Printer
Carriage Motor
Controller
(IC2)
DAD0
to
Purge Motor
DAD9
DDTA0
to
DDTA15
Paper Feed Motor
DDTB0
to
SAD0
SDT0
DDTB15
to
to
SAD15
SDT7
Analog IC
(IC1)
BJ Cartridges
Figure 4-37 Logic Board Block Diagram
Flapper Unit
Eject Roller
Paper Feed Roller
Purge Unit
Sheet Feeder
Cassette
Purge Motor
Pick-up Roller
Paper End
J1101,1102
Sensor
Sensor
Mechanism
Section Control
V
(+10.3VDC)
H
V
(+35VDC)
M
Interface Control
V
(+5VDC)
CC
J3
Serial Interface
Figure 4-38 Printer Block Diagram
4-37
Part 4: Technical Reference
RD
D0
A0
to
to
RES
D15
A23
EXTAL (16MHz)
Ink Sensor
P75
MPU
Paper End
(IC1)
Sensor
Pick-up Roller
Sensor
Purge Sensor
PC1,P90
P92,P94
PB2
Driver IC
DC
PB4,PB5
Driver IC
PB6,PB7
PC4
PM
PC3
PA0,PA1
Driver IC
PB1,PB3
PC5
PM
BEA0-3
BEB0-3
BGA
BGB
Temperature
HE0-5
Sensor
SCKA
SCKB
SDA0-5
SDB0-5
SHE0-5
Carriage
Black/Photo
BJ Cartridge
Paper Feed Motor
Carriage Motor
J1201,1202
J1003
Indicator Control
J2
Indicator
Parallel Interface
D0
A1
to
to
D15
A20
8-Mbit
Control
ROM
(IC3)
4Kbit
EEPROM
POWER Button
RESUME Button
BJ Cartridge
REPLACE Button
Carriage Board
RNKOUT
DSOUT1,2
Color BJ
Cartridge
Carriage Board
Temperature
Sensor
J701
J702
J703
Carriage Control
Switch Detection
Control Button
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