Epson Stylus Photo 720 Service Manual page 63

EPSON Stylus Photo 720 / EPSON Stylus Photo EX3
Table 3-7. Repair of the Printer Mechanism
Symptom Condition
Friction of the
LD roller.
Abnormal
Paper is not fed. operation of the
hopper.
Malfunction of
ASF drive
switching
function.
Abnormal
Paper
Feeding.
Friction of PF
roller
Page heading
position is wrong.
PE sensor is
defective.
Troubleshooting
Cause Check Point
Clean the LD
Load paper and
roller with the
check if the LD
cleaning sheet.
roller revolves
Replace the LD
smooth when
roller if it does
picking up paper.
not recover.
Check the
movement of the Replace the
ASF hopper ASF.
visually.
Insert DE lever to
the left side of the Replace the DE
CR shaft and check lever and ASF
if drive from PF drive switching
roller is transmitted gear.
to the ASF.
Clean the PF
roller by the
Check if the PF cleaning sheet.
roller slips during Replace the PF
the paper feeding. roller if the
problem is not
solved.
-Check if PE sensor
lever moves
-Replace the PE
smoothly.
sensor assembly.
-Check if the
-Re-assemble
assembly with the
each part and
right paper guide is
remove foreign
made correct and
substances.
check if there is any
foreign substances.
Unit Repair (Printer Mechanism)
Table 3-7. Repair of the Printer Mechanism
Solution Symptom
Printer stops
Fatal error
during
appears.
initialization
Condition Cause Check Point
Check the signal
ASF sensor is
level of the ASF
defective.
sensor.
Check the signal
HP sensor is
level of the HP
defective.
sensor.
Check the CR motor
CR motor is
cable is connected
defective.
properly.
Check if the PF
PF motor is
motor cable is
defective.
connected properly.
Revision A
Solution
Replace ASF
sensor.
Replace HP
sensor.
Replace the CR
motor if there is
no problem in
the cable
connection.
Replace the PF
motor if there is
no problem in
the cable
connection.
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