Indicator Lights - Epson TM-U950 Operator's Manual

JOURNAL/SLIP FEED
When the printer is in the roll paper mode (the SLIP light is not on
or blinking), press the JOURNAL/SLIP FEED button once to advance
journal paper one line. You can also hold down JOURNAL/SLIP
FEED to feed journal paper continuously.
When the printer is in the slip paper mode (the SLIP light is on or
blinking) and slip paper is inserted, press the JOURNAL/SLIP FEED
button once to advance slip paper one line. You can also hold down
JOURNAL/SLIP FEED to feed slip paper continuously.

Indicator lights

The control panel lights provide information on printer conditions.
POWER (green)
The POWER light is on when the printer power is on.
ERROR (red)
The ERROR light is on or blinking when the printer is not ready to
print.
The ERROR light is on (not blinking) under the following
conditions:
When the printer is first turned on or reset through the
interface. The light goes off as soon as the printer is initialized.
When the printer cover is open.
When the printer is at or near the end of a roll of paper.
The ERROR light blinks under the following conditions:
When the print head is overheated. If this happens, the printer
waits until the print head cools and then resumes printing.
2-2 Using the Printer