User's Manual

Page 72 of 83

A Carrier Corp. Company

PART NUMBER T82002163

REV A

9.0 Battery Low Alert Function:

The Trip Strip II has a LED indicator which will indicate a low battery condition by steady red LED.

The circuit is comprised of two Comparators. If the Vin(+) terminal is Low and the Vin(-) terminal is High,

then the output is Low (current will flow). However if the Vin(+) terminal is High and the Vin(-) terminal

is Low, then the output is High (current will not flow).

Therefore, If the Load in the variable input (5 – 27VDC) is <= 6.5VDC, then the Low Batt LED will be

ON. However, if the variable input is >6.8VDC, then the Low Batt LED is OFF. The other input VB =

3.3VDC, which is a fixed input.

If the variable input voltage (Load) is <=6.0VDC, then the Q107 FET (P-Channel) will close.

10.0 Line Thermal Head Printer:

Citizen model # MLT-289 50mm thermal print head without the paper cutting functionality.

Head Temperature Detection Thermistor

Paper End Detection Photointerruptor (LED Indication)

Head-Up Detection Mechanical Switch

Vp = 6.25VDC

Vdd = 5VDC

The thermal head is comprised of heating elements and the head drivers that drive the heating elements.

Serial print data, fed to the SI input, is shifted into the register synchronized with the Shift clock, then is

latched into the latch register at the active edge of the LATCH signal. The Head Drive signal (Print

commands STR1-6) opens the gate to energize the heating elements reflecting the print data.