Intermec EasyCoder PD4, Service Manual

Page: 78 / 114

IO
B
us
In
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t
C
on
so
le
IO
Po
rts
CPU
Flash (1)
Memory
(1M)
Flash (2)
Memory
(1M)
EDO
RAM
(2M)
RTC
Flash
Memory
Extension
(2M)
Power
supply
24 VDC
Power Input
FEED
PAUSE
CANCEL
System Buss
Sensors
Ri
bb
on
E
nd
TPH open
TPH temp
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rm
is
tor
Po
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de
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io
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Po
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p
Se
ns
or
BM
se
ns
or
GA
P
se
ns
or
Virtual pot
RS-232 port
IEEE 1284
USB
LCD
Buzzer
LEDs
Stepper Motor
Printhead
Cu
tter
Rew
in
der
un
it
Drivers
EEP
R
O
M
Sensors
A/D line
68 Intermec EasyCoder PD4—Service Manual
Chapter 12—Main Board
12.1 Description
Models
There are three different main boards for the EasyCoder PD4 depending
on printer model:
• EasyCoder PD4 No display 203.2 dpi
• EasyCoder PD4 LCD display 203.2 dpi
• EasyCoder PD4 LCD display 300 dpi
The printer must be fi tted with the correct type of main board or it will
not work.
All types of main board are based on the same circuit board but the com-
plement of circuits differ. They are all designed to work with ESim v5.xx
for EasyCoder PD4 or later versions.
The main boards are delivered as complete units. Do not attempt to repair
or modify a main board.
The main board has a 16 bit microprocessor and, as standard, a memory of
2MB fl ash and 2MB DRAM.
The models with an LCD display has a real-time clock and the memory
can be expanded using a 2MB fl ash memory module.
Block Diagram