TSC PRINTRONIX TTP-243 Pro Series - LED and Button Functions; LED Indication

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4. LED and Button Functions
4.1 LED Indication
LED
Indication
PWR. (POWER) Indicator
The green PWR. indicator illuminates when the POWER switch is turned on.
ON-LINE Indicator
The green ON-LINE indicator illuminates when the printer is ready to print. When PAUSE button
is pressed, the ON-LINE indicator flashes.
ERR. Indicator
(Error/Paper Empty)
The red ERR. indicator illuminates in the event of a printer error, such as memory error, syntax
error, and so forth.