Epson TM U200D - B/W Dot-matrix Printer Technical Manual page 90

Table 4-2 Troubleshooting table for bad printing (Continued)
Problem Probable cause
Gears may be worn or
damaged.
Paper is not fed.
(Printing is
performed on
Motor, paper feed
one line.)
ass'y may be bad.
(cont.)
The Motor, paper feed
may be bad.
The operation of the
paper supply may be
incorrect.
The paper path may
be incorrect.
The connector is not
inserted correctly.
The Roller, paper feed
The paper
may be worn or
feeding pitch is
damaged.
not uniform.
The Roller, paper hold
ass'y may be bad.
The Roller, paper hold
ass'y may be worn or
damaged.
Gears may be worn or
damaged.
The ribbon cassette
may be loose.
The ribbon cassette
may be bad.
The Plate,ribbon drive
ass'y may be bad.
The printer prints,
The clutch portion of
but the ribbon is
Ribbon take-up ass'y
not fed.
may be worn.
Gears may be worn or
damaged.
4-12 Troubleshooting
Level Checkpoint
Check the wear and damage
of the Gear, paper feed
B
reduction and Gear, paper
feed.
Check the continuity of the PF
B
motor cable ass'y.
The cause is none of the
B
above.
Check if the specified paper
A
roll is used.
Check if the paper supply path
A
is blocked.
Make sure that the pin of the PF
the motor cable is inserted in
A
the connector CN6 of the Main
circuit board.
Check the wear and damage
B
of the surface of the roller.
Check if the Roller, paper hold
B
ass'y rotates smoothly.
Check the wear and damage
B of the rollers of the Roller, paper
hold ass'y.
Check the wear and damage
of the Gear, paper feed
B
reduction and Gear, paper
feed.
Check if the ribbon cassette is
A
installed correctly
Check if the ribbon is fed by
A rotating the ribbon-tightening
knob.
Check if the Plate, ribbon drive
B
ass'y moves smoothly.
Check if the ribbon does not
move smoothly when you turn
B
the upper portion of the Ribbon
take-up ass'y.
Check if the Ribbon drive ass'y,
Gear, ribbon intermediate,
B Gear, ribbon transmission, and
Ribbon take-up ass'y are worn
or damaged
Check if any foreign
B substances are attached to the
gears.
Action
Replace any worn or
damaged parts.
Replace the Motor, paper
feed cable ass'y.
Replace the Motor, paper
feed.
Use the correct paper roll.
(See "Paper Specifications"
in Chapter 1.)
Remove paper particles
and foreign substances.
Reinsert the connector.
Replace Roller, paper
feed.
Clean and lubricate the
Roller, paper hold ass'y or
replace it.
Replace the Roller, paper
hold ass'y.
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 Plate, ribbon
drive ass'y.
Replace Ribbon take-up
ass'y.
Replace any worn or
damaged parts.
Remove the foreign
substances.
Rev.B