Epson TM-U200 series Technical Manual page 93

C o n fid e n tia l
Table 4-2 Troubleshooting table for bad printing (continued)
Problem
The paper feed
pitch is not
uniform.
The printer prints,
but the ribbon is
not fed.
Rev. A
Probable cause
Operation of the
paper supply may be
incorrect.
The paper path may
be incorrect.
The connector is not
inserted correctly.
The paper feed roller
may be worn or
damaged.
The paper hold roller
assembly may be
bad.
The paper hold roller
assembly may be
worn or damaged.
Gears may be worn or
damaged.
The ribbon cassette
may be loose.
The ribbon cassette
may be bad.
The ribbon drive plate
assembly may be
bad.
The clutch portion of
ribbon take-up
assembly may be
worn.
Gears may be worn or
damaged.
TM-U200 Series (Type B) Technical Manual
Level Checkpoint
A Check if the specified paper
roll is used.
A Check if the paper supply path
is blocked.
A Make sure the PF motor cable
pins are inserted in connector
CN6 of the main circuit board.
B Check for wear and damage
on the surface of the roller.
B Check if the paper hold roller
assembly rotates smoothly.
B Check for wear and damage
to the rollers of the paper hold
roller assembly.
B Check for wear and damage
to the paper feed reduction
gear and paper feed gear.
A Check if the ribbon cassette is
installed correctly.
A Check if the ribbon is fed by
rotating the ribbon-tightening
knob.
B Check if the ribbon drive plate
assembly moves smoothly.
B Check whether the ribbon
moves smoothly when you turn
the upper portion of the ribbon
take-up assembly.
B Check if the ribbon drive
assembly, ribbon intermediate
gear, ribbon transmission gear,
and ribbon take-up assembly
are worn or damaged.
B Check if any foreign
substances are attached to the
gears.
Action
Use the correct paper roll.
(See "Paper Specifications"
in Chapter 1.)
Remove paper particles
and foreign substances.
Reinsert the connector.
Replace paper feed roller.
Clean and lubricate the
paper hold roller assembly
or replace it.
Replace the paper hold
roller assembly.
Replace any worn or
damaged parts.
Install the ribbon cassette
correctly. (See "Replacing
the Ribbon Cassette" in
Chapter 3.)
Replace the ribbon
cassette.
Replace the ribbon drive
plate assembly.
Replace ribbon take-up
assembly.
Replace any worn or
damaged parts.
Remove the foreign
substances.
Troubleshooting 4-13