Epson TM-T70II Technical Reference Manual page 83

With the LAN interface, before printing starts, it takes 6 seconds if the IP address is fixed
and 13 seconds if the IP address is obtained with the automatic setting. (It may take longer
depending on the response time from the host.)
When the printer finishes printing the printer status, the following message is printed and
the Paper LED flashes. (The printer is now in the self-test wait mode.):
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Press the Feed button while the printer is in the self-test wait mode.
If you select the SELF-TEST, the printer prints a rolling pattern using only the built-in
character set.
If you select the mode selection, follow the instructions printed by the printer.
After printing the following message, the printer is initialized and returned to the normal mode.
Chapter 3 Application Development Information
"Select Modes by pressing Feed button.
Continue SELF-TEST: Less than 1 second
Mode Selection : 1 second or more"
"*** completed***"
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