Epson TM-U950 - Page 129

4-16 Troubleshooting Rev. A
Paper roll feed pitch is
irregular.
Paper roll supplying
problem
A Check whether paper
roll corresponds to
specifications.
Use paper roll that
corresponds to
specifications.
A Check paper roll path
for obstacles.
Remove any obstacles
and repair paper roll
path as required.
Paper hold roller
lubrication is insufficient.
B Check whether paper
hold roller turns
smoothly.
Lubricate as required.
Roller-paper feed wear B Check surface of roller-
paper feed for wear and
damage.
Replace roller-paper
feed assembly.
Gear wheel wear B Check gear wheels for
wear and damage.
Replace gear wheels as
required.
Paper hold roller wear B Check surface and core
of paper hold roller for
wear.
Replace paper hold
roller assembly.
Slip paper is not fed
properly to print position.
Slip paper problem A Check whether slip
paper corresponds to
specifications.
Use slip paper that
corresponds to
specifications.
Slip paper was
improperly inserted.
A Check whether slip
paper is properly aligned
with guide portion of
paper guide-slip-lower.
Insert slip paper aligning
with guide portion.
Obstacle in paper path
inside printer
A Check paper path in
printer for obstacles.
Remove any obstacles.
J/S changeover solenoid
or sub slip paper feed
solenoid drive signal
failure
B Check drive signal. Repair drive signal
circuit.
J/S changeover solenoid
or solenoid sub slip
paper feed failure
B Check solenoid coil
resistance (nominal
value for 25° C: J/S
changeover solenoid
45
Ω
± 10%; solenoid-sub
slip paper feed 19
Ω
±
10%).
Replace J/S
changeover solenoid or
solenoid-sub slip paper
feed.
Wear or damage on
lever-J/S changeover,
J/S changeover lever
spring, J/S changeover
gear, paper feed
deceleration gear, gear
and roller of roller-sub slip
paper feed assembly,
pulley-carriage
transmission, belt-slip
paper feed
A Check parts for wear
and damage.
Replace parts as
required.
Table 4-3. Printer Mechanism Problems (continued)
Problem Probable Level Checkpoint Action
CONFIDENTIAL