Euro-500TX Handy
© Elcom, s. r. o.
Service manual
9
1 Introduction
1.1 Euro-500TX Handy technical parameters
Euro-500TX Handy is a portable ECR with following parameters:
• primary power supply
external adapter 230 V, 50-60 Hz/24 V,2.08 A
• internal power supply
2× NiMH accumulator 7.2 V, 1,500 mAh
or lead accumulator 6 V, 1,200 mAh
• maximal power input
10 W
• microprocessor system
16-bit microcontroller, 256 kB EPROM, 128 or 512 kB RAM
• memory power backup
NiCd accumulator 3.6 V, 60 mAh
• printer
thermal, CITIZEN 1320
• cashier and customer displays 1:
alphanumerical cashier LCD 2×20 characters and seg-
mented customer LCD
2:
2× alphanumerical LCD 2×20 characters
• keyboard
30 single keys and one double key
1.2 System configuration
The Euro-500TX handy has been designed as a portable ECR. Its most important parameters are low
weight, small size and possibility to operate for a longer period of time without external power supply.
At the heart of the ECR lies the 16-bit microcontroller E-500TXN that features 11 I/O ports and two serial
transfer channels. The ECR programme is stored in 256 kB of EPROM memory. Following the EPROM
programme version, the ECR operates on 128 or 512 kB of RAM.
The system contains:
• power supply circuits
• microprocessor system
• real-time circuit
• reset controller
• power supply checking circuit
• keyboard interface
• display interface
• serial interfaces RS-232 for PC, scanner and electronic scales
• interface for external PC keyboard
• power input reduction circuits
• drawer opening circuit
• paper tape detection circuits
• cashier LCD backlight
• customer LCD backlight (optional for ECRs with segment customer LCD)
• fiscal memory with its support circuits (optional)
1.3 Block chart of ECR Euro-500TX
MICROCONTROLLER
E-500TXN
Real-time
circuit
RS-232 PC
interface
RS-232 scales
and scanner
interfaces
Power supply
checking
Paper tape
sensor
External PC
keyboard
EPROM�
256 kB
SRAM�
128 (512) kB
Power input
control
circuit
Display
Keyboard
Printer
Fiscal
memory
D0 – D7
A0 – A18
8-bit data bus
19-bit address bus
Fig. 1.1: Block chart of ECR Euro-500TX
