Specifications

1-3
 Design the outer case so that the thermal head control terminals can move after fixing to the
connector because they move 2 to 3 mm due to the up/down action of the thermal head.
 Design the outer case so that it prevents the paper feed out from being caught in the platen.
 If the thermal head remains in contact directly with the platen, they may stick tight each other.
When the printer is not in use, put the paper between the thermal head and platen or place the
thermal head in an upward position. If the thermal head and the platen stick tight, it is only
necessary to release the thermal head so that the problem can be avoid.
 Design software that will deactivate the heat elements if the thermal head thermistor (TH)
detects a temperature higher than 80 °C (thermistor resistance RTH ≤ 2.48 kΩ), and reactivate
the heat elements when a temperature lower than 60 °C (RTH ≥ 4.46 kΩ) is detected. If the
thermal head continues to be activated at a temperature higher than 80 °C, the life of the
thermal head may be shortened significantly.
 The cutting surface of the motor flange may generate discoloration and rust according to
operating condition.
This is no problem for functions, however, take it into external view consideration.
1.2.2 Handling Precautions
Incorrect handling may reduce the efficiency of the printer and cause damage. Handle the printer with the
following precautions.
Also, get an operator’s attention.
 To prevent the heat elements, ICs, etc. from being damaged due to static electricity, take
measures against electrification for both machine and human before handling the printer.
Care should be taken in particular regarding the thermal head control terminals when handling.
 Do not apply stress to the thermal head control terminals; otherwise connectors, FPC (Flexible
Printed Cable) and FFC (Flexible Flat Cable) for the thermal head may be damaged.
 If any paper other than that specified is used, a high print quality and longevity of the thermal
head cannot be guaranteed.
Possible problems that may occur are:
• Poor printing quality due to low-sensitive paper
• Abrasion of the thermal head due to a paper surface which is too rough
• Sticking between the thermal layer of the paper and the thermal head resulting in
excessive noise when printing
• Print fading due to low print preservation
• Corroded thermal head due to poor thermal layer of the paper.
 Do not activate without paper; otherwise, the platen or thermal head may become damaged.
 Do not hit or scratch the surface of the thermal head with sharp or hard objects. It may become
a source of damage to the heat element.
 The thermal head is pressurized at the time of delivery from the factory. Place the thermal head
in an upward position before use. The head down, neutral and head up positions can be set
with the head up/down lever.