Line Thermal Printer Lt-286 - ELCOM Euro-2000T Alpha Service Manual

3. Line thermal printer LT-286.

3.1. General specifications.
Printing method
No. of total dots
Dot density
Print width
Paper feed pitch
Print speed
Detecting function
Operational voltage range
Consumption current
Paper feed force
Paper holding force
Head life
Operating temperature
Storage temperature
Operating humidity
Storage humidity
Outer dimensions
Weight
3.2. Thermal head.
3.2.1. Thermal head constitution.
As shown in the fig. 3-1, the thermal head comprises heating elements and head drivers to control and drive the heating
elements. The serial print data which are input from DATA IN (DI) are transferred in synchronization with the CLOCK (CP) to the
shift register, and stored in the latch register by the LATCH (LA) signal. Head activating signals (print commands STB 1 to6) turn
the gates on, and the heating elements corresponding to the stored data are activated.
L-GND
P-GND
STB6
STB5
STB4
STB3
STB2
STB1
/LATCH
DATA IN
CLOCK
DATA OUT
Euro-2000T Alpha/1000T Service manual
thermal line dot printing
384 dots per line
8 dots / mm
48 mm
0.125 mm
200 dots line / sec (operating voltage 5V)
400 dots line / sec (operating voltage 7.2V)
Print head temperature - thermistor
Paper detection - Photo Interrupter
Head up detection - mechanical switch
VH - DC4.2 - 8.5V
Vdd - DC4.75 - 5.25V
Head (VH) max. approx. 3.3A
Motor (VH) max. approx. 1.25A
50g or more
80g or more
Pulse resistance 50,000,000 pulses (print duty 12.5%)
Wear resistance - 50km
0 - 45C
-20 - 60C
35 - 85% RH
10 - 90% RH
76(W) X 56.5(D) X 21(H)
Approx. 82g
1, 2, 3, 26, 27, 28
VH
18
13, 14, 15, 16, 17
23
22
21
10
9
8
5
25
6
4
7
Vdd
19, 20, 21
NC
11
TM
12
TM
STB pins are pulled down inside of IC.
Heating unit
Latch register
Shift register
Thermistor
© Elcom s.r.o.
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