Epson TM
U220 Reference Guide

Rev. E Troubleshooting 4-1
TM-U220 Technical Reference Guide
Chapter 4
Troubleshooting
This section describes general troubleshooting.
4.1 LED Blinking Pattern
4.1.1 Error Types
The printer stops all printer operations for the selected paper section, goes offline, and the
ERROR LED blinks when an error is detected.
4.1.1.1 Errors that automatically recover
Note:
(*1) This conditions are selected by MSW 8-5, 8-8. When MSW 8-5 (mapping of the cover open status) is
off, the error hasn’t occurred but there is a “paper end error” instead. If MSW 8-8 is off, this error is
handled as an automatically recoverable error.
(* 2) Print head temperature error is not abnormal.
ERROR Description
ERROR LED Blinking Pattern
Recovery
Roll paper cover
open error (when
recoverable error is
selected) (*1)
The roll paper cover is
opened when printing.
Recovers automatically
when the cover is
closed.
Print head
temperature error (*2)
The temperature of the
print head is extremely
high
Recovers automatically
when the print head
cools
160 ms

Epson TM
U220 Specifications

General

Print speed	4.7 lps
Character size	1.6 x 3.1 mm
Print technology	Dot matrix
Paper dimensions	57.5±0.5/69.5±0.5/76±0.5 x 83.0
Dimensions (WxDxH)	160 x 286 x 157.5 mm
Certification	WEEE/RoHS
Mean time between failures (MTBF)	180000 h
Parallel connector	Yes
Standard interfaces	Parallel