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(1) When continuous printing is performed, the supply energy should be reduced so that the substrate
temperature monitored through the thermistor will remain below the maximum temperature show in
Section 2.(Maximum Conditions at 25 degrees C)
(2) Power on and off sequence must be in the following order to prevent the dot element damage;
Turn on - Apply the logic supply voltage (V
dd
) first and the printhead supply voltage.
Turn off - Switch off the printhead supply voltage first and turn the logic supply voltage off.
(3) Interface each signal input (CLK, LAT, STB, DI) with CMOS level (ex. 74HC240). Please keep STB signal
to “Disable” during ON/OFF and during no printing condition.
(4) Heat elements and IC’s shall be anti-electrostatic in order to prevent the electrostatic destruction. Do not
touch the connector pins y naked hands.
(5) The printhead substrate surface is coated with glass and mechanical stress or shock (including dust scratch
damage) should be voided to prevent damage.
(6) When the printhead operation is finished, print supply voltage. (including the charged operation)
(7) Platen roller should be composed of non-conductive materials.
(8) Condensation should be avoided. If condensation occurred, do not switch on the printhead power until
condensation disappeared.
(9) The connectors installed are connected directly to the substrate. Please pay attention to the extra forces to
get damages when the connector is plugged in or out. (Plug in-out cycle for this connector shall not be
exceeded 20 times.) Do not pick up connector to take printhead.
(10) Print quality would be degraded if paper or ink residue were sticked on the heat element area. For such a
case, please use applicator with alcohol to clean up. Do not use the sandpaper destroying the heat
elements.
(11) If printing sound, for example sticking sound, occurred, please review and adjust the paper feed
mechanism and the electrical pulse program to eliminate the sound.
(12) The change of printhead flatness (warp) is minimized with temperature change in the free body of one
unit. Please pay attention to the warp created by fixing the printhead to the printer unit with screws or
clamp.
(13) Please pay attention that the paper used does not include bad factor to affect the printhead life.
(14) If printhead operation method is changed, Please inform us in advance to change.
(15) In order to avoid surge, V
H
and GND cable length should be less than 100mm, and 47
༲
Aluminum
capacitor is required between V
H
and GND at controller board side. Evaluation is required when the
length of V
H
and GND cable is more than 100mm.
(16) Please design the system in such a way that the printing medium (while in printing) and the paper guide
do not contact IC protective coating and pin protective coating, in order to ensure to the good printing
quality.
(17) Thermal head is heat-generating device; it can cause smoking and combustion as a result of abnormal
heating if damaged electrically or mechanically.