Kyocera KM-4230

2A3/4
2-3-11
2-3-8 Operation unit main PCB, operation unit right PCB, and
operation unit left PCB
ODSW
CFL
OMPCB
OLPCB
ORPCB
LCD
–23 V DC
Touch
panel
Chip select
Touch
panel
circuit
Reset
circuit
Address
decode
circuit unit
EPROM
IC12
EPROM
IC16
SRAM
IC9
SRAM
IC20
CPU
IC19
LCD
controller
IC11
DC-DC
converter
IC8
CFL
lighting
circuit
unit
Scan signal
Return signal
Scan signal
Return signal
Address bus
Address bus
Data bus
Data bus
Key
switch/LED
display
Key
switch/LED
display
Main
PCB
Figure 2-3-8 Operation unit main PCB, operation unit right PCB, and operation
unit left PCB block diagram