Epson TM-U220 Series Service Manual page 30

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