Epson TM-T81III Technical Reference Guide

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Chapter 3 Advanced Usage
Self-test Mode
You can check the following items using the self-test.
 Product name
 Firmware version
 Product serial number
 Interface information
 Resident fonts
 Maintenance counter information (print head running length, number of times of auto-cutting)
Follow the steps below. The self-test can also be executed using ESC/POS Commands.
1
Close the roll paper cover.
2
While pressing the Feed button, turn on the printer.
(Hold down the Feed button until printing starts.)
After printing the current print status, a Continuing self-test guidance is printed, and the Power LED
flashes.
3
Briefly press the Feed button (less than one second) to continue the self-test.
The printer prints a rolling pattern on the roll paper, using the built-in character set.
After “*** completed ***” is printed, the printer initializes and switches to standard mode.
NV Graphics Information Print Mode
Prints the following NV graphics information registered to the printer.
 Capacity of the NV graphics
 Used capacity of the NV graphics
 Unused capacity of the NV graphics
 Number of NV graphics that are registered
 Key code, number of dots in X direction, number of dots in Y direction to be defined.
 NV graphics data
Follow the steps below.
1
After running a self-test, hold down the Feed button for at least one second to enter
the Mode selection.
The Mode selection guidance is printed, and the Paper LED flashes.
For details on NV graphics, see "NV Graphics Memory" on page 17.

Epson TM-T81III Specifications

General

Print Method	Thermal line printing
Resolution	203 x 203 dpi
Paper Width	79.5 ± 0.5 mm
Auto Cutter	Yes
Interface	USB, Serial
Dimensions	140 x 199 x 146 mm
Paper Thickness	0.06 to 0.08 mm