Description; Block Diagram - Intermec EasyCoder PD4 Service Manual

Chapter 12—Main Board

12.1 Description

Models

Block Diagram

FEED
PAUSE
CANCEL
LCD
Buzzer
LEDs
IEEE 1284
RS-232 port
USB
Power
Power Input
supply
24 VDC
68
There are three different main boards for the EasyCoder PD4 depending
on printer model:
• EasyCoder PD4 No display
• 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.
CPU
Sensors
203.2 dpi
Flash (1) Flash (2)
Memory Memory
(1M) (1M)
System Buss
A/D line
Virtual pot
Sensors
Intermec EasyCoder PD4—Service Manual
Flash
EDO Memory
RAM Extension
RTC
(2M) (2M)
Drivers