Data Processing In The Printing Head; Printing Data And Their Position; Thermistor Specification; Time Diagram - ELCOM Euro-500 Handy Series Service Manual

Euro-500TX Handy

3.2.2 Data processing in the printing head

The printing head has four gates (strobes) that allow the printing to be divided into four parts. The corres-
pondence of these gates to individual thermal elements is shown in following table. Actual printing is divided
into two parts (two gate signals are activated simultaneously).

3.2.3 Printing data and their position

The 576 bits of data that are carried by the DATA IN signal are printer in positions as shown in the picture
below. The data lying in the gap between the receipt and the journal are permanently equal to zero.

3.2.4 Thermistor specification

a) electrical characteristics
B constant
b) ranges temperature range:
c) relation between temperature and resistance:
R : resistance at chosen temperature (°C)
X
R : resistance at 25 °C (30 kΩ ± 5 %)
25
B: 3,950 K ± 2 % (constant)
EXP (x): natural logarithm

3.2.5 Time diagram

Fig. 3.3 Time diagram

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Service manual
STB # Thermal element #
1 1 - 144
2 145 - 288
3 289 - 432
4 433 - 576

Tab. 3.1 Gates (strobes) placement

Printing side
1 2 3 4 ......................................................576
PRINTER MECHANISM
MOTOR

Fig. 3.2 Printing data placement

resistance 30 kΩ ± 5 % at 25 °C
3,950 K ± 2 %
-20 to +80 °C
CLOCK (CLK)
tsetup DI
DATA IN (DI)
DATA OUT (DO)
LATCH (LAT)
High: HOLD
Low: THROUGH
STROBE (STB)
DRIVER OUT
Dots per STB
64
64
64
64
Tape feed direction
Gap between the receipt and journal
DATA IN
tw CLK
thold DI
td DO
tw setup LAT tw hold LAT
tsetup STB
tw LAT
tdo
tdo
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