Epson TM-U220 Series Service Manual page 39

Confidential
Paper is not cut correctly
Table 3-9 Cutter not Working Correctly
Probable part/probable cause
DIP switch setting
Full cut/partial cut setting
Fixed blade spring (1016)
Cutter blade
Ribbon feed mechanism does not operate
Table 3-10 Ribbon Feed Mechanism not Functioning Correctly
Probable part/probable cause
Ribbon cassette
Ribbon take-up function
Adjustment roller shaft holders
(506)
Rev. B
Checkpoints
Check the setting of DSW 2-2.
OFF: Autocutter is disabled.
ON: Autocutter is enabled.
Check the full cut and partial cut
setting. Make sure the autocutter unit
(113) is mounted in the correct position.
Check the spring power. Make sure it
has enough power to push the fixed
blade (513) against the fixed blade
holder (1017).
Check the fixed blade (513). Make sure
it does not have any nicks.
Check the movable cutter blade on
the cutter frame assembly (114). Make
sure it does not have any nicks.
Checkpoints
Check the mounting. Make sure it is
installed correctly.
Check the ribbon cassette itself. Make
sure the ribbon is fed by turning the
tab.
Check the take-up operation. Be sure
the following parts move with
operation of the carriage sub
assembly (1025):
Belt drive pulley (505)
Ribbon middle gear (512)
Ribbon drive plate sub assembly
(517)
Ribbon take-up gear sub assembly
(516)
Check the platen gap adjustment.
0.45 mm: falls with no weight applied
0.55 mm: does not fall
TM-U220 Type A Service Manual
Action to correct the problem
Switch DSW 2-2 to ON. Completed if
cutting is normal.
Mount the autocutter unit (113) in the
correct position. Completed if cutting
is normal.
Replace the fixed blade spring (1016).
Completed if cutting is normal.
Replace the fixed blade (513).
Completed if cutting is normal.
Replace the cutter frame assembly
(114). Completed if cutting is normal.
Action to correct the problem
Install the ribbon cassette correctly.
Completed if printing is normal.
Replace the ribbon cassette with a
new one. Completed if printing is
normal.
Replace the defective gear.
Completed if the operation is normal.
Adjust the platen gap (refer to page
5-5). Completed if printing is normal.
Troubleshooting 3-11