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4.2 Logic
4.2.1 Logic block diagram
Part 4: Technical Reference
BJC-7100
4-40
DBUS0
to
DBUS15
ABUS1
to
ABUS20
RD
INIT0
to
INIT3
RESET
Printer
Controller
(IC2)
LED0
to
LED2
IP0
IP1
PWMA,
PWMB
RAMB0
to
RAMB15
RAMA0
to
RAMA9
RD OE
CS0 CE
D0
to
D15
A11
to
A30
D0
to
D15
A0
to
A18
Address Data Bus
Address Bus
MPU
(IC1)
Control
ROM
(IC3)
Driver IC
Driver IC
DRAM
Data
Bus
DRAM
Address
Bus
A0
to
A9
I/O0
to
I/O7
DRAM (IC5)
4-Mbit
A0
to
A9
I/O0
to
I/O7
DRAM (IC6)
4-Mbit
PM
PM
Paper Feed
Motor
Carriage
Motor
Ink-out
Detection
Circuit
BJ Cartridge
INKOUT
ANT,PHANT
Carriage Board
RANKOM
RANKBK
RANKPH
RANKCL
BE0
to
2
IDATAOM
IDATABK
IDATAPH
IDATACL
EVENE
ODDE
HEATEOM
HEATEBK
HEATEPH
HEATECL
LTCLK
LTRST
P104
P103
P102
P137,
TA12
to
TA15
T00
to
T03
P144
to
P147
P73
to
P75,T0
20MHz
Paper End
Sensor
Pickup Roller
Sensor
Purge Sensor
RD
INIT0
to
INIT3
RESET
Error Indicator
Power Indicator
Parallel
Interface
EEPROM
2kbit
BZ
Transistor
POWER button
Buzzer
ID1OM
ID1BK
ID1PH
ID1CL
ID2OM
ID2BK
ID2PH
ID2CL
Home
Position
Sensor
Printer
Temperature
Sensor
AN6
AN7
P101
P105
P155
TA04,TA05
TA10,TA11
RESUME button
P156
REPLACE button
P157
Reset IC
Figure 4-30 Logic Board Block Diagram