ELCOM Euro-2000T Alpha User manual

Euro-2000T Alpha/1000T
Service manual
© Elcom s.r.o.
Version 1.3
E -1000
URO

This document has been published to be used for after sales service only.
The contents are subject to change without notice.
No part of this publication may be reproduced in any form or by any means
for any commercial purpose.
Copyright by Elcom s. r. o. All rights reserved.

Contents
1. Introduction ..................................................................................................................................................... 5
1.1. Euro-2000T Alpha/1000T specifications .......................................................................................................................... 5
1.2. System configuration ........................................................................................................................................................ 5
1.3. Block diagrams .................................................................................................................................................................. 6
2. Circuits description ........................................................................................................................................ 7
2.1. Power supply circuits ....................................................................................................................................................... 7
2.1.1. External power source ......................................................................................................................................... 7
2.1.2. Primary power circuit. ........................................................................................................................................... 7
2.1.3. Voltage regulator ................................................................................................................................................... 8
2.1.4. Printer power circuit.................................................................................................................................. ......... 8
2.1.5. Secondary power circuit ...................................................................................................................................... 9
2.1.6. Fiscal memory power circuit ................................................................................................................................. 9
2.1.7. Power voltages description ................................................................................................................................. 9
2.2. Microcontroller and its supporting circuits. .................................................................................................................... 10
2.2.1. Microcontroller E-2000N. ..................................................................................................................................... 10
2.2.2. Memory circuits. .................................................................................................................................................. 12
2.2.3. Reset system. ..................................................................................................................................................... 13
2.2.4. Real time clock circuit. ......................................................................................................................................... 13
2.3. I/O circuits. ...................................................................................................................................................................... 14
2.3.1. Printer control circuits. ........................................................................................................................................ 14
2.3.2. Keyboard. ............................................................................................................................................................ 16
2.3.3. Displays. .............................................................................................................................................................. 18
2.3.4. Euro-2000T Alpha control lock............................................................................................................................ 22
2.3.5. Communication circuits ....................................................................................................................................... 22
2.3.6. FM circuit connection .......................................................................................................................................... 25
2.3.7. Other circuits ........................................................................................................... ............................................ 25
3. Line thermal printer LT-286. ............................................................................................................................ 27
3.1. General specifications. ................................................................................................................................................... 27
3.2. Thermal head. ................................................................................................................................................................. 27
3.2.1. Thermal head constitution. .................................................................................................................................. 27
3.2.2. Head division processing. ................................................................................................................................... 28
3.2.3. Print data and print position ................................................................................................................................. 28
3.2.4. Specifications of thermistor ................................................................................................................................ 28
3.2.5. Timing chart. ........................................................................................................................................................ 28
3.3. Paper feed ....................................................................................................................................................................... 29
3.3.1. Specifications of stepping motor ........................................................................................................................ 29
3.3.2. Excitation sequence ............................................................................................................................................ 29
3.3.3. Motor control circuit ............................................................................................................................................. 29
3.4. Head-up sensor .............................................................................................................................................................. 30
3.5. Paper end sensor circuit ................................................................................................................................................ 30
3.6. Total timing chart ............................................................................................................................................................ .30
3.7. Connecting terminals ...................................................................................................................................................... 31
3.7.1. Thermal head terminal ......................................................................................................................................... 31
3.7.2. Motor and sensor terminal ............................................................................................................................ ......32
3.8. How to clean the thermal head ...................................................................................................................................... 32
4. Installation of modules ..................................................................................................................................... 33
4.1. Removing and installing the top cabinet ......................................................................................................................... 33
4.2. Lead acid accumulator replacement .............................................................................................................................. 35
4.3. Printer replacement ......................................................................................................................................................... 36
4.4. Winding motor replacement. ........................................................................................................................................... 37
4.5. Mainboard replacement. ................................................................................................................................................. 38
4.6. EPROM replacement. ...................................................................................................................................................... 39
4.7. SRAM replacement. ........................................................................................................................................................ 39
4.8. NiCd battery replacement. .............................................................................................................................................. 40
4.9. Keyboard replacement ................................................................................................................................................... 41
4.9.1. Euro-2000T Alpha keyboard replacement .......................................................................................................... 41
4.9.2. Euro-1000T keyboard replacement .............................................................................................................. ......42
4.10. Display replacement. ...................................................................................................................................................... 43
4.10.1.Euro-2000T Alpha alpha-numerical and segment display module replacement ............................................... 43
4.10.2.Euro-1000T display module replacement ..................................................................................................... ......44
4.11. Euro-2000T Alpha control lock replacement. ................................................................................................................. 45
4.12. Peripherals to mainboard connection . .......................................................................................................................... 46
4.12.1.Euro-2000T Alpha peripherals to mainboard connection .................................................................................. 46
4.12.2.Euro-1000T peripherals to mainboard connection ...................................................................................... ......47
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© Elcom s.r.o.
Euro-2000T Alpha/1000T Service manual

© Elcom s.r.o.
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Euro-2000T Alpha/1000T Service manual
4.13. External equipments cables and connectors. ................................................................................................................ 48
4.13.1. Euro-2000T Alpha external equipments cables and connectors .................................................................... 48
4.13.2. Euro-1000T external equipments cables and connectors. .............................................................................. 49
4.14. LCD backlight installation procedure .............................................................................................................................. 51
4.15. Remote drawer ............................................................................................................................................................... 52
4.16. Remote display ................................................................................................................................................................ 53
4.17. External keyboard ........................................................................................................................................................... 55
4.18. Euro-2000T Alpha to PC connection through RS-232 interface .................................................................................... 56
4.19. Bar code scanner and electronic scales connection to Euro-2000T Alpha through RS-232 ...................................... 56
4.20. PC communication - option.............................................................................................................................................. 57
4.21. Euro-2000T Alpha cash registers interconnection through interface RS-485 ............................................................. 58
5. LT 286 maintanence ......................................................................................................................................... 59
5.1. Handling and maintanence of printer. ............................................................................................................................. 59
5.2. Thermal head procedure for disassembling and reassembling .................................................................................... 59
5.3. Trouble-shooting guide. .................................................................................................................................................. 65
6. Test function. .................................................................................................................................................... 66
6.1. Displays test. .................................................................................................................................................................. 67
6.2. Printer tests. .................................................................................................................................................................... 67
6.2.1. Test of printing ..................................................................................................................................................... 67
6.2.2. Thermal head position scanning test. ................................................................................................................. 68
6.2.3. Paper end sensors test....................................................................................................................................... 68
6.3. Keyboard tests. .............................................................................................................................................................. 69
6.3.1. Keyboard test 1 ................................................................................................................................................... 69
6.3.2. Keyboard test 2. .................................................................................................................................................. 70
6.4. Control lock test .............................................................................................................................................................. 71
6.5. Communication interfaces tests ..................................................................................................................................... 71
6.5.1. PC interface test .................................................................................................................................................. 71
6.5.2. Scanner and electronic scales RS-232C interface test .................................................................................... 72
6.5.3. External PC keyboard serial interface test ......................................................................................................... 73
6.5.4. RS-485 PC serial interface test........................................................................................................................... 74
6.5.5. PC serial interface interrupts test ....................................................................................................................... 75
6.6. Cash drawer opening test.............................................................................................................................................. 75
6.7. FM tests ........................................................................................................................................................................... 76
6.7.1. Reading data from FM test .................................................................................................................................. 76
6.7.2. FM writing test ..................................................................................................................................................... 77
6.7.3. VFD and VFP voltage testing .............................................................................................................................. 77
6.7.4. FM control signal test I ........................................................................................................................................ 78
6.7.5. FM control signal test II ........................................................................................................................................ 78
7. Troubleshooting ................................................................................................................................................ 79
7.1. Power circuit problems. .................................................................................................................................................. 79
7.2. Microprocessor system problems .................................................................................................................................. 80
7.3. Problems in printer........................................................................................................................................................... 80
7.4. Problems in display. ......................................................................................................................................................... 82
7.4.1. Euro-2000T Alpha problems in display ............................................................................................................... 82
7.4.2. Euro-1000T problems in display ......................................................................................................................... 82
7.5. Problems in keyboard and control lock........................................................................................................................... 83
7.6. Communication problems. ............................................................................................................................................... 83
7.6.1. Euro-2000T Alpha communication problems ...................................................................................................... 83
7.6.2. Euro-1000T communication problems ................................................................................................................. 84
7.7. Problems in real time clock and date .............................................................................................................................. 85
7.8. Other problems. .............................................................................................................................................................. 85
8. Part list & how to order the spare parts? ....................................................................................................... 86
8.1. Part lists. .......................................................................................................................................................................... 86
8.2. Mainboard part list........................................................................................................................................................... 86
8.3. Keyboard part list............................................................................................................................................................ 88
8.3.1. Euro-2000T Alpha keyboard partlist ................................................................................................................... 88
8.3.2. Euro-1000T keyboard partlist.............................................................................................................................. 89
8.4. Segment display module part list. ................................................................................................................................... 90
8.5. Euro-2000T ALPHA alpha-numerical display module part list. ...................................................................................... 90
8.6. Bottom cabinet part list. .................................................................................................................................................. 91
8.7. Top cabinet part list. ........................................................................................................................................................ 91
8.8. How to order the spare parts and modules. .................................................................................................................. 92

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© Elcom s.r.o.
Euro-2000T Alpha/1000T Service manual
1. Introduction
1.1. Euro-2000T Alpha/1000T specifications
Euro-2000T Alpha is a portable electronic cash register with the following specifications:
powered by external adaptor 230V, 50-60Hz/12V, 1200mA
sealed lead-acid accumulator 6V, 3Ah
max. power consumption 15 W
microprocessor system 16 bit microcontroller, 256 kB EPROM (OTP), 128kB - 512kB SRAM
memory back-up NiCd (NiMH) accumulator 3,6V; 60mAh (80mAh)
printer thermal, CITIZEN LT-286
operator display LCD, character 2 lines x 20 characters
customer display LCD, 96 segments
keyboard Cherry mechanical, 36 simple and 3 double keytops
Euro-1000T is a portable electronic cash register with the following specifications:
powered by external adaptor 230V, 50-60Hz/12V, 1200mA
sealed lead-acid accumulator 6V, 3Ah
max. power consumption 15 W
microprocessor system 16 bit microcontroller, 256 kB EPROM (OTP), 128kB SRAM
memory back-up NiCd (NiMH) accumulator 3,6V; 60mAh (80mAh)
printer thermal, CITIZEN LT-286
display LCD, 2 x 96 segments
keyboard silicone rubber keypad, 36 simple and 3 double keytops
1.2. System configuration
Euro-2000T Alpha/1000T is designed as a portable electronic cash register. The main advantages are low weight, small
dimensions and long lasting powering without an external adaptor thanks to the high capacity of the internal accumulator.
The core of Euro-2000T Alpha/1000T is 16-bit microcontroller E-2000N, with 11 I/O ports and two serial channels. The program
is stored in 256kB EPROM. According to the EPROM software, the microcontroller supports 128kB or 512kB SRAM.
System consists of:
power circuits
microprocessor system
real time clock circuit
reset controller
power voltage checking circuit
keyboard interface
control lock interface - only Euro-2000T Alpha
display interface
printer interface
serial interface RS 232C for PC, scanner and electronic scales - only Euro-2000T Alpha
interface RS 485 for PC - only Euro-2000T Alpha
external PC keyboard interface
RS 232C communication module interface - only Euro-1000T
drawer circuit
paper end sensor circuit (optional)
operator display backlight (optional for Euro-1000T)
customer display backlight (optional)
fiscal memory (optional)
external accumulator - battery box (optional)

© Elcom s.r.o.
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Euro-2000T Alpha/1000T Service manual
1.3. Block diagrams
MICROCONTROLLER
E-2000N
EPROM
256 kB
SRAM
128 (512) kB
8 bit data bus
20 bit address bus
A 0 - A 1 9
D 0 - D 7
Real time
clock circuit
RS232C
interface for PC
RS232C
for scanner
and scales
RS485
interface for PC
External
PC keyboard
Power voltage
checking
Paper end
sensor
Display
Fiscal
memory
Printer
Keyboard
MICROCONTROLLER
E-2000N
EPROM
256 kB
SRAM
128 kB
8 bit data bus
20 bit address bus
A 0 - A 1 9
D 0 - D 7
Real time
clock circuit
External
PC keyboard
Interface
for PC
com. module
Power voltage
checking
Paper end
sensor
Display
Fiscal
memory
Printer
Keyboard
Euro-1000T block diagram
Euro-2000T Alpha block diagram

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© Elcom s.r.o.
Euro-2000T Alpha/1000T Service manual
2. Circuits descriptions
2.1. Power supply circuits.
2.1.1. External power source - AC/DC adaptor.
External power source - AC/DC adaptor MW1212GS 230V, 50-60 Hz/12V, 1200mA.
Functions of the adaptor:
•powering the ECR directly from a 230V/50 Hz outlet
•charging of the internal lead acid accumulator
•for charging of the external battery box - optional
2.1.2. Primary power circuit.
The primary power circuit converts the input DC voltage of AC/DC adaptor (or battery box, car or bus light connector) to
stabilized DC voltage of 7,4V. The core of this circuit is MC33167T (5A) DC/DC convertor which has the following features.
• built-in current fuse (6,5A), built-in thermal fuse
• switching frequency of 72 kHz allows to use a small external components, high withstanding against outlet
interference
• convert effeciency more than 80%, low heat losses
fig. 2.2 Primary power circuit
External adaptor connection
Adaptor CNN 1
+ (red) 1
- (black) 2
fig. 2.1 External power supply
INPUT
AC 230V/50Hz
T1
TRANSFORMER
D1 D2
D3 D4 C1
+OUTPUT
DC 12V
RESETABLE THERMAL FUSE
Note: If the external power supply is connected to the ECR, the internal lead acid accumulator is charging even if the ECR
is turned off.
C1
330u/25V
C8
3300u/10V
R1
4k7
R6
10k
R34
6k8
R36
68k
C11
100n
C12
100n
D1
D11
1N5822
1N5822
D2
1N5408
L1
150u
2
15
4
3
U14
MC34167
R48
4k7
R49
10k
POWER
C20
100n
5
1
2
CNN1
POWER
EF1
C22
1u/35V
EMI
FILTER

© Elcom s.r.o.
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Euro-2000T Alpha/1000T Service manual
2.1.3. Voltage regulator.
The Voltage regulator circuit turns the ECR on and off. It provides a constant voltage Vcc. Turning the ECR off and on is performed
by a three-pole switch SW-POWER connected to CNN3.
The NiCd (NiMH) back-up accumulator BT1 provides power for a real time clock circuit and a SRAM. BT1 is charged by VRAM=5
- 5,3V through R21 resistor. If Vpr=0V, BT1 powers the real time clock circuit and the SRAM through diode D6.
fig. 2.3 Voltage regulator
Measured values:
VB : 6,0 V ± 0,3 V - without external adaptor
6,8 V ± 0,2 V - with external adaptor
VRAM : 5,2 V ± 0,1 V - ECR on (VCC=5V)
3,6 V ± 0,5 V - ECR off (VCC=0V)
Internal accumulator connection
Accumulator CNN2
+ (red) 1
- (black) 2
Note: Pulling out the JP1 jumper may cause deleting of all data stored in SRAM and the real time clock circuit when the
cash register is turning off.
fig. 2.4 Printer power circuit
Switch SW-POWER connection
CNN3
SW-POWER
SWITCH
SW1 1
2
3
6-6.8V
5V
3.6-5V
3
5.3
U[V]
+0.02
-0.02
010 3040 60
70 t [us]
D2
1N5408
1
2
CNN2
BATTERY
T1
BD436
T3
BC817
T4
BC817
R39
220R
R7
10k
R46
47k
R50
5k9/F
R21
1k0
1
2
3
CNN3
SW-POWER
F1
3.15A
C10
100u/10V
D6
LL4148
BT1
3V6, 60mAh
VCC
VRAM
VBat
VB1
VB VPR
GND
C21
100n
VB1
D3
1N5819
D8
1N5819
JP1
CLEAR
GND
T5
BC817
T6
BC817
R25
4k7
R35
6k8
R55
270k
R56
33k
C32
3300u/ 10V
VB1
VB VH
T15
BC857
R8
10k
R57
120R
VB1
T16
BC817
R38
68k
RST
C25
100n
T2
MTP23P06V
T17
BC817
R33
2k0
POWER
R69
68k
5.7-6.5V
2.1.4. Printer power circuit.
The printer power circuit regulates the power source for the printer power circuits. This source is also the input power for the
secondary power source.
The correct power-on and power-off of voltage for the printrer power circuits also affects the lifetime of the printer. Delayed
power-on is provided by signal RST, that switches transistor T16 through resistor R38. The fast power off of the printer power
circuits is provided by resistor R8 and transistor T15, so that the discharging current flow through is limited by resistor R57.
To speed up the printing, the output voltage depends on the status of external adaptor. If the external adaptor is connected, the
output voltage is 6,5V, otherwise the value is 6V (from internal lead acid accumulator). This function is provided by transistor T17,
on which the voltage from the primary power circuit is based.

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© Elcom s.r.o.
Euro-2000T Alpha/1000T Service manual
2.1.6. Fiscal memory power circuit.
The FM power circuit provides voltages necessary for programming, verification and reading data from the FM. The following
circuit provides the mentioned voltages.
Measured voltages:
VPP-GEN = 1 VFP : 5,1 V ± 0,1 V VFD : 5,1 V ± 0,1 V
VPP-GEN = 0 VFP : 12,9 V ± 0,1 V VFD : 6,4 V ± 0,1 V
fig. 2.6 FM power circuit
2.1.5. Secondary power circuit.
The secondary power circuit provides:
•drawer voltage
•main voltage for fiscal memory
Fig. 2.5 Secondary power source
The secondary power circuit is a step-up DC/DC converter with a switching frequency of 33 kHz and a convert efficiency of
more than 87%. This circuit has both a current (1,35A) and a thermal fuse. The input voltage of the secondary power circuit is
VH voltage. The output voltage is (VDR) 15V.
8
7
6
5
1
2
3
4
U12
MC34063
R22
220R
R26
R22
R27
22k/F
R29
2k0/F
L2
150u
C30
2200u/16V
D5
1N5819
C24
1000p
VH
VDR
C23
100n
15V
1.25V
0
00,3
2017
1,2
37 40 t[ s]
µ
U[V]
T14
2N7002
T13
2N7002
R32
220R/F
R53
665R/F
R52
220R/F
VPP-GEN
VDR
VFP VFD
R45
665R/F
R5 4
1,37k/F
Vout
2Vout 7
NC 5
Vout 6 Vout
3Vin
1
Adj
4
NC 8
U17
LM317L
Vout
2Vout 7
NC 5
Vout 6 Vout
3Vin
1
Adj
4
NC 8
U18
LM317L
VFP
R60
220R/F
VDR
VFD
R62
68k
R61
10k
VRAM
2.1.7. Power voltages description.
VH + 6V the power for printer and secondary power circuit, ripple less than < 0,2 V
(without an external adaptor)
+ 6,5V the power for printer and the secondary power circuit, ripple less than < 0,2 V
(with external adaptor)
VCC + 5V the logic power ripples less than < 0,1 V
VRAM + 5V the power for SRAM and the microcontroller, if ECR is on, ripple less than < 0,1 V
> 2,5V the power for SRAM, if the ECR is off, VCC=0V
VDR + 15V the power for drawer and the FM power circuit

© Elcom s.r.o.
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Euro-2000T Alpha/1000T Service manual
2.2. Microcontroller and supporting circuits.
2.2.1. Microcontroller E-2000N.
A 16-bit microcontroller E-2000N is used in Euro-2000T Alpha/1000T. The microcontroller provides full control of the ECR.
The microcontrollers main features are:
•2kB RAM on chip
•11 I/O ports
•program addressable space max. 16MB
•data memory addressable space max. 16MB
•five 16-bit counters/timers
•seven external interrupts
•two full duplex USART (serial channels)
•10-bit A/D convertor, 8 channels
•8-bit D/A convertor, 2 channels
•watchdog timer
•frequency up to 18MHz
•oscillator and timer circuits on chip
•package QFP 100
Pin location and description is on figure 2.7 and in table 2.1.
fig. 2.7 Microcontroller E-2000N
VRAM
FM-AL/CN0
FM-AH/CN1
A16/CN2
FM-DIR/CN3
C-RS
FM-SEL
FM-PGM
VPP-GEN
NC
GND
TXD0
TXD1
RxD0
RxD1
KB-CLK
FM/KB
FD0/RW1
FD1/RW2
FD2/RW3
FD3/RW4
FD4/RW5
FD5/RW6
FD6/P-L
GND
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
23
24
25
22
FD7/PW D0 D1 D2 D3 D4 D5 D6 D7
VVRAM
A0 A1 A2 A3 A4 A5 A6 A7
GND
A8 A9 A10 A11 A12 A13
26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50
A14
A15
A16
A17
A18
NC
GND
SEL-LCD
CLK-LCD
D-L CD/P R-DI
NC
STBY
RST
NMI
GND
EXTAL
XTAL
VRAM
NC
RD
WR
NC
MD0
MD1
MD2
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100
E - 2 0 0 0 N
NC
CS4
B2
B1N
A2
A1N
PR-CLK
PR-SEL
GND
CS0
CS1
CS2
RSI
GND
BUZZER
DRAWER
KB-DATA
PR-DO
HU
TC
PA P 1
VRAM VRAM
PAP2

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© Elcom s.r.o.
Euro-2000T Alpha/1000T Service manual
Pin No. Name Type Signal description
2000T Alpha 1000T
1 VRAM VRAM I power supply +5V
2 FM-AL/CN0 FM-AL/CN0 O validity of low order address byte for FM / keyboard control
3 FM-AH/CN1 FM-AH/CN1 O validity of high order address byte for FM / keyboard control
4 A16/CN2 A16/CN2 O the highest order address bit for FM control / keyboard control
5 FM-DIR/CN3 FM-DIR/CN3 O FM reading enable / keyboard control
6 C-RS - O data transmission direction of RS-485
7 FM-SEL FM-SEL O FM circuit selection
8 FM-PGM FM-PGM O FM programming control signal
9 VPP-GEN VPP-GEN O FM programming voltage control signal
10 NC NC NC
11 GND GND I Ground
12 TXD0 - O serial data out, channel 0
12 - PC-SG2 I/O PC communication control / external PC keyboard data input
13 TXD1 - O serial data out, channel 1
14 RXD0 - I serial data in, channel 0
15 RXD1 - I serial data in, channel 1
16 KB-CLK - I external PC keyboard clock
16 - PC-SG1 I/O PC communication control / external PC keyboard data input
17 FM/KB FM/KB O FM / keyboard selection
18 FD0/RW1 FD0/RW1 I/O FM data 0. bit / keyboard and control lock scanning
19 FD1/RW2 FD1/RW2 I/O FM data 1. bit / keyboard and control lock scanning
20 FD2/RW3 FD2/RW3 I/O FM data 2. bit / keyboard and control lock scanning
21 FD3/RW4 FD3/RW4 I/O FM data 3. bit / keyboard and control lock scanning
22 GND GND I Ground
23 FD4/RW5 FD4/RW5 I/O FM data 4. bit / keyboard and control lock scanning
24 FD5/RW6 FD5/RW6 I/O FM data 5. bit / keyboard and control lock scanning
25 FD6/P-L FD6/P-L I/O FM data 6. bit / keyboard and control lock scanning
26 FD7/PW FD7/PW I/O FM data 7. bit / external power supply connection scanning
27-34 D0-D7 D0-D7 I/O data bus
35 VRAM VRAM I power supply +5V
36-43 A0-A7 A0-A7 O low order address output
44 GND GND I Ground
45-55 A8-A18 A8-A18 O high order address output
56 NC NC NC
57 GND GND I Ground
58 SEL-LCD SEL-LCD O LCD controller selection
59 CLK-LCD CLK-LCD O LCD controller clock signal
60 D-LCD/PR-DI D-LCD/PR-DI O LCD controller data / printer data
61 NC NC NC
62 STBY STBY I stand-by mode selection
63 RST RST I Reset signal
64 NMI NMI I NMI
65 GND GND I Ground
66 EXTAL EXTAL I external oscillator
67 XTAL XTAL I external oscillator
68 VRAM VRAM I power supply +5V
69 NC NC NC
70 RD RD O data reading enable
71 HWR HWR O data writing enable
72 NC NC NC
73-75 MD0-MD2 MD0-MD2 I proccessor mode selection
76 VRAM VRAM I power supply +5V
77 VRAM VRAM I power supply +5V
78, 79 PAP1, PAP2 PAP1, PAP2 I receipt and journal paper presence scanning

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Euro-2000T Alpha/1000T Service manual
table. 2.1 Signal description of microcontroller E-2000N
2.2.2. Memory circuits.
ECR memory is divided in two parts:
•program memory
•data memory
The program is stored at EPROM 256kB. Data are stored at SRAM 128kB. Program memory is activated by signal CS0, data
memory by signal CS1.
ECR Euro-2000T Alpha / 1000T uses SRAM with low power consumption that allows it to substantially increase the total back-
up time of memory by the NiCd accumulator. It is recommended to use just the original RAM types, otherwise it could cause a
higher bus interference, and it may shorten the time of the data memory back-up.
Fig. 2.8 Memory circuit
A0
12 A1
11 A2
10 A3
9A4
8A5
7A6
6A7
5A8
27 A9
26 A10
23 A11
25 A12
4
CS1 22
A17
30 WE 29
OE 24
D0 13
D1 14
D2 15
D3 17
D4 18
D5 19
D6 20
D7 21
A13
28 A14
3A15
31 A16
2
A18
1
U2
KM681000A
A0
A1
A2
A3
A4
A5
A6
A7
A8
A9
A10
A11
A12
A13
A14
A15
A16
S17
A18
D0
D1
D2
D3
D4
D5
D6
D7
CS1
RD
HWR
R19
0R
R23
10k
A17 S17
VRAM
A0
12 A1
11 A2
10 A3
9A4
8A5
7A6
6A7
5A8
27 A9
26 A10
23 A11
25 A12
4A13
28 A14
29 A15
3CE 22
OE 24
DQ0 13
DQ1 14
DQ2 15
DQ3 17
DQ4 18
DQ5 19
DQ6 20
DQ7 21
A16
2A17
30
VPP 1
PGM 31
U3
27C020
D0
D1
D2
D3
D4
D5
D6
D7
A0
A1
A2
A3
A4
A5
A6
A7
A8
A9
A10
A11
A12
A13
A14
A15
A16
A17
VCC
CS0
RD
R10
10k
VRAM CS1
Note: It is possible to extend the data memory of Euro-2000T Alpha to 512kB by the procedure described in chapter 4.
Pin No. Name Type Signal description
2000T Alpha 1000T
80 TC TC I thermal head temperature scanning
81 HU HU I thermal head position scanning
82 PR-DO PR-DO I printer data out
83 KB-DATA - I external PC keyboard data out
84 DRAWER DRAWER O drawer control signal
85 BUZZER BUZZER O buzzer control signal
86 GND GND I Ground 0V
87 RSI - I RS-485 interrupt
88 NC NC NC
89 CS2 CS2 O RTC selection
90 CS1 CS1 O SRAM selection
91 CS0 CS0 O EPROM selection
92 GND GND I Ground 0V
93 PR-SEL PR-SEL O Printer control circuit selection
94 PR-CLK PR-CLK O Printing control clock signal
95 P-SOL A1N O printer motor control signal - stepping motor 1st solenoid
96 P-MOT A2 O printer motor control signal - stepping motor 1st solenoid
97 W-MOT B1N O printer motor control signal - stepping motor 2nd solenoid
98 B2 B2 O printer motor control signal - stepping motor 2nd solenoid
99 CS4 CS4 O Printer control circuit selection
100 NC NC NC

13
© Elcom s.r.o.
Euro-2000T Alpha/1000T Service manual
fig. 2.10 Real time clock circuit
XO
2WR 7
I/O 5
RD 6
CS 3 XI
1
U13
V 3021
Q2
32k768
CS2
D0
RD
HWR
R12
10k
VRAM
1
2
U [V]
0.8
0.4
03162
t [ s]
µ
2
U [V]
0.4
0
-0.4
31 62
1
fig. 2.9 Reset and standby controllers
VCC 2
GND
RST
1
U11
V6309
3 VCC
RST
4.25
t [ms]
VCC
4.5
t [ms]
0150
RST
VCC
2
GND
OUT 1
T19
V6340/F
3
VCC
STBY
4.25
t [ms]
VCC
4.5
t [ms]
0
STBY
2.2.3. Reset system.
The starting and switching off of the system are very important for its proper functioning. The reset system provides the proper
initialization of the system during starting, prevents memory loss and keeps the system safe during switching off.
Microcontroller E-2000N is powered from a NiCD back-up battery during the ECR is off. The power voltage is VRAM (current
consumption 500nA). The reset system is controlled by the signals Reset and STBY(stand-by mode). These signals are driven
by reset and stand-by controllers.
The reset controller provides:
•reliable initialization of microcontroller during switching on of the ECR
•signal reset during switching off of the ECR
The reset signal is active at 0. Time delay is about 150ms.
The threshold voltage of the reset controller V6309 is 4,5 V.
The standby controller provides:
•reliable initialization of the microcontroller from the stand-by mode during the starting the system
•a signal which activates STBY to ensure the stand-by mode of E-2000N if VCC drops to the threshold voltage of
the stand-by controller
STBY signal is active at 0.
The threshold voltage of V6340/F is 4,5V. If the power voltage is lower than 4,5 V, V6340/F activates the stand-by mode of CPU.
2.2.4. Real time clock circuit.
Real time clock circuit V3021 provides an
actual time and actual date.
V3021 consist of:
•counter
•shift register
•voltage regulator
•voltage detector
•interface
V 3021 communicates with E-2000N through the data line D0
and control signals RD and HWR. The RTC is activated by
signal CS2.
To keep the actual date and time when the ECR is off, V3021 is powered from the back-up accumulator NiCd. The back-up voltage
has to be 2,5 V at minimum. The stand-by current consumption is 500 nA at maximum.

© Elcom s.r.o.
14
Euro-2000T Alpha/1000T Service manual
fig. 2.11 Printer control signals
C9
100n
1
2
CNN5
W-MOTOR
VH
D7
LL4148
T11
TI P11 0
R30
4k7
W-MOT
GND
BD14
BCM4532
A1N
A2
B1N
B2
PA 1
PA 2 N
PB1
PB2N
VH
1,2EN
1
1A
21Y 3
GND
4GND
5
2Y 6
2A
7
VCC2 8
3,4EN
9
3A
103Y 11
GND 12
GND 13
4Y 14
4A
15
VCC1 16
U8
L293D
VCC
C28
100n
VH
RS7- 9
10k
VCC
CPU
D0
3Q0 2
D1
4Q1 5
D2
7Q2 6
D3
8Q3 9
D4
13 Q4 12
D5
14 Q5 15
D6
17 Q6 16
D7
18 Q7 19
OE
1CLK
11
U5
74HC374
1
23
&
U10A
74HC00
8
9
10
&
U10C
74HC00
HWR
CS4
STB1
STB2
STB3
STB4
STB5
STB6
W-MOT
P-LATCH
PR-SEL
D0
D1
D2
D3
D4
D5
D6
D7
11
12
13
&
U10D
74HC00
CLK
*
RS2
B 220R
PR-LATCH
PR-CLK
D-LCD/ PR-DI
DO
P-LATCH
P-CLK
LCD/PR
P-DO
fig. 2.12 Stepping motor and winding motor control
2.3. I/O circuits.
2.3.1. Printer control circuits.
A Citizen LT-286 thermal printer is used in Euro-2000T Alpha / 1000T. The printer is controlled by the the following
signals or circuits:
•signals for correct printing
•printer stepping motor control
•journal winding motor control
•signals for correct work and safety of the thermal printer
All these controls are carried out by the following circuits.

15
© Elcom s.r.o.
Euro-2000T Alpha/1000T Service manual
fig. 2.15 Thermal head temperature scanning fig. 2.16 Thermal head position scanning
The control signals description is in part 2.2.1. table .2.1. The full description of printer control is in chapter 3.
Signals for correct work and safety of thermal printer.
fig. 2.13 Paper presence scanning fig. 2.14 Printer correct connection checking circuit
fig. 2.17 Printer connectors
R37
68k
R40
220R
LED+VCC
C3 6
1000p
VCC
PS2
R44
220R
PA P2
R43
220R C3 1
1000p
HU HS
RS7-5
10k
VCC
R59
150k
R47
47k
T1 0
BC817
TS
TC
VCC
RS7-2
10k
VCC
4
5
6
&
U10B
74HC00
PR-DO
P-DO
RS7-7
10k
VCC
RS2
220R
DO
VH
P-LATCH
P-CLK
VCC
STB1
STB2
STB3
TS
GND
STB4
STB5
STB6
DATA
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
CNN11
PRINTER T1
VH
GND
DO
PS2
LED+
HS
PA 1
PA 2 N
PB1
PB2N
1
2
3
4
5
6
7
8
9
10
CNN1 2
PRINTER T2
GND
GND
GND
DC Motor CNN5
+ (red) 1
- (black) 2
Journal paper winding motor connection.
2 (Red)
1 (B la c k)
12
BlackRed
Gum

© Elcom s.r.o.
16
Euro-2000T Alpha/1000T Service manual
2.3.2. Keyboard.
a.) Euro-2000T Alpha keyboard.
Euro-2000T Alpha consists of 36 simple and 3 double keytops. It is divided into six rows and seven columns. Key scanning is
performed by the decoding of DG0-DG3 (74HC42) and by the scanning the returning signals ROW1-ROW6. 74HC42 output
signals 0 - 6 are used for keyboard columns, signal 7 is used to generate a signal for key lock position scanning and for the input
voltage value checking. The recognition of a pressed key and a key lock position is performed by scanning the returning lines
ROW1-ROW6.
The keys of keyboard are mechanical switch modules. The lifetime of the keyswitch module is 50 million pressings in the case
of keeping the keyboard clean (MCBF-109).
There is a double size mechanism under the double keytop. This mechanism provides a comfortable key travel by presing on any
place of the keytop.
It is recommended to use a cover in a dusty and wet environment.
fig. 2.18 Euro-2000T Alpha keyboard circuit
VCC GND LCD-SEL LCD-CLK LCD-DATA
CNN14
DISPLAY
1 2 3 4 5
GND VCC
16 15 14 13 12
11
10
9 8 7 6 5 4 3 2 1
1 2 3 4 5 6 7
ROW6 ROW5 ROW4 ROW3 ROW2 ROW1
CNN6
KEYBOARD
ROW1 ROW2 ROW3 ROW4 ROW5 ROW6
CNN13
CONTROL LOCK
D8 LL4148
VCC
C1
100n
42
1 2 3 4 5 6 7 9 10 11
0 1 2 3 4 5 6 7 8 9
D C B A
12 13 14 15
U1
SW
SW
SW
SW
SW
SW
SW
SW
SW
SW
SW SW
SW SW SW
SW
SW
SW
SW SW
SW
SWSW
SW SW
SW SW
SW
SW SW
SW
SWSW SW
SW
SW
SW SWSW
D1
D2
D3
D4
D5
D6
D7
LL4148
LL4148
LL4148
LL4148
LL4148
LL4148
LL4148
SW 1.1 SW 2.1 SW 3.1 SW 4.1 SW 5.1 SW 6.1
SW 1.2 SW 2.2 SW 3.2 SW 4.2 SW 5.2 SW 6.2
SW 1.3 SW 2.3 SW 3.3 SW 4.3 SW 5.3 SW 6.3
SW 1.4 SW 3.4 SW 4.4 SW 5.4 SW 6.4
SW 1.5
SW 3.5 SW 4.5 SW 5.5 SW 6.5
SW 2.5
SW 1.6 SW 2.6 SW 3.6 SW 4.6
SW 1.7 SW 2.7 SW 3.7 SW 4.7
SW 5.6 SW 6.6
74HC42 signals timing
output 5
ou tp ut 3
o utp ut 2
0
5
2.5
0
5
2.5
0
5
2.5
0
5
2.5
0
5
2.5
0
5
2.5
0
5
2.5
0
5
2.5
ou tpu t 1
output 7
ou tpu t 6
output 4
U [V]
ou tp ut 0
t [ms]
4826
t [ms]
48
26
t [ms]
4826
t [ms]
4826
t [ms]
4826
t [ms]
4826
t [ms]
4826
t [ms]
4826
0
5
t [ms]
48
input D
2.5
0
5
t [ms]
48
input C
2.5
26
0
5
t [ms]
48
input B
2.5
26
0
5
t [ms]
U [V]
48
input A
2.5
2613 5 7

17
© Elcom s.r.o.
Euro-2000T Alpha/1000T Service manual
b.) Euro-1000T keyboard.
Euro-1000T keyboard is a silicone rubber keypad consisting of 36 simple and 3 double keytops. It is divided into six rows and
seven columns. Key scanning is performed by the decoding of DG0-DG3 (74HC42) and by scanning the returning signals ROW1-
ROW6. 74HC42 output signals 0 - 6 are used for keyboard columns. The recognition of a pressed key is performed by scanning
the returning lines ROW1-ROW6.
There is a description printed on keytops. The printing lifetime is tested according to the Japanese standard JIS Z 0236, which
ensures the lifetime of 200,000 pressings at minimum. The contacts are made of conductive rubber. The lifetime of contacts is
500,000 pressings at minimum.
fig. 2.19 Euro-1000T keyboard circuit
74HC42 signals timing.
1 2 3 4 5 6 7 8 9
10 11 12 13 14 15 16
CNN6
KEYBOARD
1 2 3 4 5
CNN14
DISPLAY
D1
LL4148
D4
LL4148
D3
LL4148
D5
LL4148
D6
LL4148
D7
LL4148
D2
LL4148
SW1. 1
SW
SW2. 1
SW
SW3. 1
SW
SW4. 1
SW
SW5. 1
SW
SW6. 1
SW
SW6. 2
SW
SW5.2
SW
SW6. 3
SW
SW5. 3
SW
SW6. 4
SW
SW6. 5
SW
SW6. 6
SW
SW5. 4
SW
SW5. 5
SW
SW5. 6
SW
SW4.2
SW
SW4. 3
SW
SW4. 4
SW
SW4. 5
SW
SW4. 6
SW
SW3. 2
SW
SW3. 3
SW
SW3. 4
SW
SW3. 5
SW
SW3. 6
SW
SW2. 2
SW
SW2. 3
SW
SW2. 5
SW
SW2. 6
SW
SW1. 2
SW
SW 1. 3
SW
SW1. 4
SW
SW1. 5
SW
SW1. 6
SW
SW1.7
SW
SW 2. 7
SW
SW3. 7
SW
SW4. 7
SW
01 12 23 34 45 56 67 79 810 911
D
12
C
13
B
14
A
15
U1
74HC42
LCD-DATA L CD -SEL LCD-CLK GND VCC
GND VCC ROW6 ROW5 ROW4 ROW3 ROW2 ROW1
ROW1
ROW2 ROW3
ROW4
ROW5 ROW6
C1
100n
VCC
DG3 DG2 DG1 DG0
DG0 DG1 DG2 DG3
0
5
t [ms]
48
input D
2.5
0
5
t [ms]
48
input C
2.5
26
0
5
t [ms]
48
input B
2.5
26
0
5
t [ms]
U [V]
48
input A
2.5
2613 5 7
output 5
ou tp ut 3
output 2
0
5
2.5
0
5
2.5
0
5
2.5
0
5
2.5
0
5
2.5
0
5
2.5
0
5
2.5
0
5
2.5
ou tpu t 1
output 7
ou tpu t 6
output 4
U [V]
ou tp ut 0
t [ms]
4826
t [ms]
48
26
t [ms]
4826
t [ms]
4826
t [ms]
4826
t [ms]
4826
t [ms]
4826
t [ms]
4826

© Elcom s.r.o.
18
Euro-2000T Alpha/1000T Service manual
2.3.3. Displays.
Euro-2000T Alpha has two display units. The first for a operator, the second for a customer.
The displays are controlled by the microcontoller C-D2000Alpha. The data from the main microcontroller are sent to C-D2000Alpha
through the serial line, which is driven by the signals SEL, CLK and DATA. This companion processor is located on the PCB under
the Alpha-numerical display module. The control signals are connected through the connector CNN14 from the keyboard PCB.
For the display control signals description see the part 2.2.1. in table 2.1.
The operator display is 20 characters, two lines LCD with LED backlight.
The LED backlight switching off and on is controlled from the keyboard (in ,,X mode by pressing the key [x/time]). If the LED
backlight is on, the backlight is automatically switching off if no key is pressed within 15 seconds. Pressing the key switches
the backlight on again. The maximal current consumption for Alpha-numerical display backlight is 150mA. The maximal current
consumption for segment display backlight is 250mA.
Microcontroller C-D2000Alpha.
Euro-2000T Alpha uses 8-bit microcontroller C-D2000Alpha. Microcontroller provides the full control of LCD displays.
Its main features are:
•high density CMOS
•64 byte RAM
•3 I/O ports
•two 16-bit counters/timers
•two external interrupts
•frequency up to 18 MHz
•oscillator and timing circuit on chip
•PLCC 28 package
For the microcontroller pins location refer to the figure 2.20 and for their description refer to the table 2.2.
fig. 2.20 Microcontroller C-D2000Alpha
C-D2000Alpha
9
8
7
6
11
5
10 E
R/W
BL
DB0
RST
NC
NC
21
22
23
24
19
25
20
NC
NC
LCD-SEL
LCD-CLK
RS
DB7
CLK
16 15 14 13 18 12 17
28 1 2 3 26 4
27
NC SEL GND X1 LCD-DATA X2 DATA
VCC DB4 DB3 DB2 DB6 DB1 DB5
Euro-1000T has both customer and operator displays. Both displays are of identical construction, liquid crystal type. 96
segments are controlled by the display driver NJU 6432BF (duplex drive).
NJU 6432BF is capable of driving 104 segments. LCDs are parallel-connected through the connector CNN14 from the keyboard
PCB. For the control signal description refer to 2.2.1.
Optional LCD backlights D1 can be installed upon request. LED backlights are driven by the LCD driver NJU 6432BF (SEG49,SEG50).
Switching the backlights off and on is controlled from the keyboard (in ,,X mode press the key [x/time]). The maximum power
consumption of one backlight is 250mA.

19
© Elcom s.r.o.
Euro-2000T Alpha/1000T Service manual
tab. 2.2 Microcontroller C-D2000Alpha signal description
Pin No. Name Type Signal description
1 DB4 I/O 4.data bit for alpha-numerical display
2 DB3 I/O 3.data bit for alpha-numerical display
3 DB2 I/O 2.data bit for alpha-numerical display
4 DB1 I/O 1.data bit for alpha-numerical display
5NC
6 DB0 O 0.data bit for alpha-numerical display
7 BL O alpha-numerical display backlight control
8 R/W O data direction selection for alpha-numerical display
9 E O select signal for alpha-numerical display
10 NC
11 RST I reset signal
12 X2 O output for external oscillator
13 X1 I input for external oscillator
14 GND I ground
15 SEL I/O control signal between microcontrollers
16 NC
17 DATA I/O data between microcontrollers
18 LCD-DATA I data for segment display
19 RS O transmitted data meaning selection for alpha-numerical display
20 CLK I/O control signal between microcontrollers
21 NC
22 NC
23 LCD-SEL O select signal for segment display
24 LCD-CLK O clock signal for segment display
25 DB7 I/O 7.data bit for alpha-numerical display
26 DB6 I/O 6.data bit for alpha-numerical display
27 DB5 I/O 5.data bit for alpha-numerical display
28 VCC I power supply 5V
fig. 2.21 Displays control
Q1
11.0592M
C1
15p
C2
15p
C3
1u/35V
1
2
3
4
5
CNN1
MAIN
1
2
3
4
5
CNN2
SEG-LCD
12 34 56 78 910 1112 1314 1516
CNN3
ALPHA-LCD
R3
10k
R2
3R9
VCC
GND
DATA
CLK
SEL
VCC
GND
LCD-SEL
LCD-CLK
LCD-DATA
T1
BC857
R1
1k
VCC
GND
GND
R/W
DB0
DB2
DB4
DB6
A
VCC
RS
E
DB1
DB3
DB5
DB7
BL
BD4
EBM3216
BD3
EMB3216
BD2
EBM3216
BD1
BCM4532
R4
10kR5
10k
DB0
DB1
DB2
DB3
DB4
DB5
DB6
DB7
VCC
P0.0
9P0.1
8P0.2
7
P3.0 6
P3.1 4
P3.2 3
P3.7 25 P1.7
24 P1.6
23
P3.3 2
P3.6 26
P3.5 27
P3.4 1
P1.5
20
RST
11
X2 12
X1 13
P1.0
15 P1.1
16 P1.2
17 P1.3
18 P1.4
19
U1
C-D2000Alpha
SEL
CLK
DATA
LCD-DATA
RS
LCD-SEL
LCD-CLK
BL
R/W
E
R6
220R
R7
220R
R8
220R
BD5
BCM4532
R11
220R
R10
220R
R9
220R
GND
VCC

© Elcom s.r.o.
20
Euro-2000T Alpha/1000T Service manual
fig. 2.22 Segment display connection to NJU6432B
8888
PLUDPT
LowBat
1 2 3 4 5
6
7
8
9
10
11
12 13 14 15 16 17 18 19 20
21
22
23
24
C1
680p
R1
47k
VCC
C3
10
µ
10
µ
+
C2
+
VCC
LCD-SEL
CNN14
DISPLAY
5
4
3
1
LCD-DATA
LCD-CLK
LCD-SEL
GND
VCC
2
R2
47k
LCD-CLK
LCD-DATA
COM1
COM2
U
1
55 OSC
56 VDD
57 INH
VSS
59
58
60
VLCD
CE
61
62
SCL
DN
64
63
COM1
COM2
54
0
5
t [ s]
µ
U [V]
2.5
21 42
0
5
t [ s]
µ
U [V]
15.8 17 32.8
2.5
0
5
t [ms]
U [V]
3.5 14 17.5
2.5
1
2
3
fig. 2.23 NJU6432B circuit
The operator display (Euro-1000T) and the customer display (Euro-2000T Alpha a Euro-1000T) is a segment type LCD - 96
segments. The segments control is switched by signals COM1 and COM2. The segment display is driven by LCD controller
NJU6432B. This is a 54 segments driver with a duplex driving. It allows to drive up to 104 segments.