Epson TM-U220 Series Service Manual page 35

Confidential
Line spacing is irregular.
Table 3-14 Line spacing is irregular
Probable part/probable cause
Roll paper is inserted
incorrectly
Paper jam
Gear does not rotate
Paper hold spring (1014)
Paper hold roller (1015)
Paper guide roller (1045)
Two-color printing is not performed, or colors are mixed.
Table 3-15 Printing is not two-color, or colors are mixed
Probable part/probable cause
Ribbon cassette
Two-color shift function
Rev.A
Checkpoints
Check the roll paper. Make sure it meets
specifications and is loaded correctly.
Check the paper path. Make sure there
is no paper jam.
Check gear operation. Make sure the
following gears rotate with each other.
Paper feed gear (1063)
Paper feed middle gear B (510)
Paper feed middle gear (509)
Paper feed reduction gear 1 (1093)
Make sure the I/F circuit board unit (122)
shaft rotates with the rotation of paper
feed reduction gear 2 (1058).
Check the spring mounting. Make sure it
is mounted correctly. (Refer to page 4-
17)
Check operation. Make sure it rotates
smoothly.
Check operation. Make sure it rotates
smoothly.
Checkpoints
Check the ribbon type. Make sure it is for
2-color printing.
Check the mounting. Make sure the
ribbon is installed correctly.
Check the mounting of the spring. Make
sure the following springs are mounted
correctly.
Ribbon take-up spring (1088)
Ribbon frame spring (1022))
TM-U220 (TypeB/TypeD) Service Manual
Action to correct the problem
Load roll paper that meets
specifications correctly. Completed if
operation is normal.
Open the roll paper cover and
remove the paper jam. Completed if
operation is normal.
Replace the defective gear.
Completed if operation is normal.
Insert the paper hold spring (1014)
correctly. Completed if operation is
normal.
Replace the paper hold roller (1015).
Completed if operation is normal.
Clean, so the paper guide roller
(1045) rotates correctly. Completed if
operation is normal.
Action to correct the problem
Replace the ribbon cassette with one
for 2-color printing. Completed if
printing is normal.
Install the ribbon cassette correctly.
Completed if printing is normal.
Mount the springs correctly.
Completed if printing is normal.
Troubleshooting 3-13