Unit Repair - Printer Mechanism (M-4A11); Table 5-8. Repair Of The Printer Mechanism - Epson Stylus Pro Service Manual

Troubleshooting
5.5 UNIT REPAIR — PRINTER MECHANISM (M-4A11)
Any problems related to the printer mechanism should be repaired according to the troubleshooting
procedures in Table 5-8.

Table 5-8. Repair of the Printer Mechanism

Symptom Condition
The pump
The PF motor
mechanism
fails to rotate at
does not
power on.
operate.
Used ink does
Ink is not not flow through
absorbed or the used ink
is poorly tube during the
absorbed. cleaning
operation.
The carriage
The carriage
motor fails to
motor does
rotate at power
not rotate.
on.
The carriage
The carriage
does not
motor rotates,
operate
but the carriage
normally at
does not move.
power on
(after the
carriage has
been
manually
The carriage
centered
moves slightly
prior to
and then stops.
power on).
5-12
Cause
Foreign Manually drive the gear
substances are train connected to the
lodged in the pump mechanism to check
mechanism gears. if the motor rotates.
The PF motor is Check the coil resistance
defective. of the motor.
The tube is not
Check that the tube is
properly
properly connected to the
connected to the
cap.
cap.
The ink tube is
Check the ink tube visually.
damaged.
The cap is Check for any defective
defective. part.
Replace the pump to see if
The pump is
this causes the ink to be
defective.
absorbed normally.
Replace the printhead to
The printhead is
see if this causes the ink
defective.
to be absorbed normally.
Foreign
Manually drive the timing
substances are
belt to see if the carriage
lodged in the
motor rotates.
mechanism gears.
The carriage Measure the coil
motor is defective. resistance of the CR motor.
The pulley is Check for broken or worn
defective. pulley.
Check that the timing belt
is properly inserted into
The timing belt is
the bottom of the carriage.
defective.
Check the timing belt for
any damage.
Check whether the
carriage moves smoothly
Carriage
when moved manually.
movement is not
smooth.
Check tension of the
timing belt.
Stylus Pro Service Manual
Checkpoint
Remove any
foreign
substance.
Replace the
PF motor.
Insert the tube
properly.
Replace the
tube.
Replace the
head cap.
Replace the
pump unit.
Replace the
printhead.
Remove any
foreign
substance.
Replace the
carriage motor.
Replace the
driven pulley.
Reinsert the
timing belt.
Replace the
timing belt.
Clean and
lubricate the
carriage.
Adjust tension
of the timing
belt.
Solution
Rev.A