Epson TM-U220 Series Service Manual

3-8 Troubleshooting Rev. B
Confidential
PF (paper feed) lead wire set
(1047)
Check the connectors. Make sure they
are plugged in securely:
Paper feed motor sub assembly (1046)
Connector (CN8) on the main circuit
board unit (201)
Plug in the connectors. Completed if
operation is normal.
Check the wires for breaks and shorts.
Make sure no wires are broken or
shorted out.
Replace the PF lead wire set (1047).
Completed if operation is normal.
Paper feed motor sub
assembly (1046)
Check the resistance value. Make sure it
is 7.2 Ω or less.
Replace the paper feed motor sub
assembly (1046). Completed if
operation is normal.
Main circuit board unit (201)
Check if the parts have any damage.
Make sure the following parts look
normal.
Connector (CN8)
U8
Replace the main circuit board unit
(201). Completed if operation is
normal.
Table 3-6 The Printer Does not Print
Probable part/probable cause Checkpoints Action to correct the problem

Epson TM-U220 Series Specifications

General

Print Method	9-pin, serial impact dot matrix
Autocutter	Partial cut
Weight	Approx. 2.5 kg
Paper Thickness	0.06 to 0.085 mm
Operating Temperature	5 to 45 °C
Interface	RS-232, Bi-directional parallel, USB, Ethernet
Number of Columns	42 columns
Data Buffer	4 KB
Character Set	95 Alphanumeric, 128 x 12 Graphic
Power Supply	AC adapter
Operating Humidity	10% to 80% RH (non-condensing)
Print Speed	4.7 lines per second (at 40 columns, 16 dpi)
Paper Width	76 mm / 69.5 mm / 57.5 mm ± 0.5 mm
Copy Capability	Original + 2 copies