Brother TD-2020 Service Manual

II - 1
CHAPTER II THEORY OF OPERATION
2.1 OUTLINE OF MECHANISMS
2.1.1 Print Mechanism
■ Structure of Thermal Head
This machine adopts direct thermal printing system. The thermal head consists of 448
pieces (TD-2020/2120N) or 672 pieces (TD-2130N) of heating elements arrayed in
vertical single row as shown in the Figure 2.1-1.
The dimension of each heating element is vertical length 0.11 (TD-2020/2120N) or 0.07
(TD-2130N) (0.125mm pitch (TD-2020/2120N) or 0.0847mm pitch (TD-2130N)) x
horizontal width 0.132mm (TD-2020/2120N) or 0.11mm (TD-2130N).
Figure 2.1-1 Heating Elements of Thermal Head
■ Printing Process
A thermal paper is pressed against the thermal head in the printing process by the
force comes from a nip between the cylindrical rubber platen and the thermal head.
At this timing, voltage is applied selectively to 448 or 672 pieces of heating elements
arrayed on the thermal head. By this voltage application, the heating elements
generate heat and the thermal tape develops dots by itself at heat sensing points.
After application of voltage the thermal paper is fed to the next printing position by the
platen (0.0847 or 0.125mm).
This printing cycle is repeated and characters and geometries are printed on the tape.
One time travel distance (0.0847 or 0.125mm) is shorter than the width of a heating
element (0.11 or 0.132mm), so that continuous printing cycle can print characters and
geometries on a tape by developing dots with no gap.
Length
TD-2020/2120N: 0.11mm
TD-2130N: 0.07mm
Pitch
TD-2020/2120N: 0.125mm
TD-2130N: 0.0847mm
TD-2020/2120N: 0.132mm
TD-2130N: 0.11mm

Brother TD-2020 Specifications

General

Color	-
Print technology	Direct thermal
Maximum resolution	203 x 203 DPI
Maximum print height	98.6 mm
Maximum printing width	56 mm
Product color	White
USB port	Yes
Ethernet LAN	No
Optional connectivity	Serial (RS-232), USB 2.0
USB 2.0 ports quantity	1
Connectivity technology	Wired
Flash memory	8 MB
Tape cutting	Automatic
Internal memory	6 MB
Number of fonts	7
Built-in barcodes	QR Code
Page description languages	ESC P
Maximum label length	1 m
Cables included	USB
Character sets	Abicomp, ASCII, BRASCII, ISO 8859-15, ISO Latin 1, Italic, PC437, PC850, PC858, PC860, PC861, PC863, PC865, Roman 8
Minimum RAM	128 MB
Minimum storage drive space	70 MB
Storage temperature (T-T)	-20 - 60 °C
Operating temperature (T-T)	5 - 40 °C
Operating relative humidity (H-H)	20 - 80 %
Harmonized System (HS) code	84433210
Package weight	2833 g
AC adapter output current	6 A
AC adapter output voltage	25 V

Weight and Dimensions

Depth	215 mm
Width	110 mm
Height	172 mm
Weight	1320 g