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EPSON Stylus Photo 750 Revision A
Troubleshooting Unit Repair (Printer Mechanism) 47
3.5 Unit Repair (Printer Mechanism)
This section provides instruction for repairing mechanism. It describes
various problems, symptom, likely causes, checkpoints, and solutions.
Select appropriate symptom from the the table and check each parts
and its function as describes in the checkpoint.
Table 3-10. Repair of the Printer Mechanism
Table 3-11. Repair of the Printer Mechanism
Symptom Condition Cause Check Point Solution
Abnormal
Pump
Mechanism
Abnormal PF
motor
operation
when the
power is
turned on.
Foreign
substances
are loaded in
the PF gears.
Manually drive
the PF drive
gear and
check if it
rotates
normally.
Remove any
foreign
objects.
The PF motor
is defective.
Check the
inner coil
resistance and
see if there is
any
disconnection
of the coil.
(see
Table 3-1,
“Motor, Coil
Resistance,”
on page 39)
Exchange the
PF motor.
Defective
pump
absorption.
Used ink does
not drain to
the waste ink
pad.
The pump
tube is
crashed.
Check the
tube visually.
Exchange the
tube.
The cap is
damaged or
deformed.
Check the
tube visually.
Change the
cap
mechanism.
Symptom Condition Cause Check Point Solution
Abnormal
carriage
operation.
Carriage
operation is
abnormal
when tuning
on the power.
Foreign
substances
are loaded in
the CR drive
gears.
Check visually
if there is any
substances or
not.
Remove any
foreign
objects.
The CR motor
is defective.
Check the
inner coil
resistance and
see if there is
any
disconnection
of the coil.
(Table 3-1,
“Motor, Coil
Resistance,”
on page 39)
Exchange the
CR motor.
Carriage
operation is
abnormal
during the
printing
operation.
Carriage
movement is
not smooth.
Manually
move the
carriage and
check if it
moves
smoothly.
Exchange the
tube.
Check the
tension of the
timing belt.
Repair the
tension
mechanism or
replace it.
Check if there
is any foreign
substances on
the carriage
path.
Remove any
foreign
objects.