Epson Stylus Photo 720, Service Manual

Page: 63 / 154

EPSON Stylus Photo 720 / EPSON Stylus Photo EX3 Revision A
Troubleshooting Unit Repair (Printer Mechanism) 63
Abnormal
Paper
Feeding.
Paper is not fed.
Friction of the
LD roller.
Load paper and
check if the LD
roller revolves
smooth when
picking up paper.
Clean the LD
roller with the
cleaning sheet.
Replace the LD
roller if it does
not recover.
Abnormal
operation of the
hopper.
Check the
movement of the
ASF hopper
visually.
Replace the
ASF.
Malfunction of
ASF drive
switching
function.
Insert DE lever to
the left side of the
CR shaft and check
if drive from PF
roller is transmitted
to the ASF.
Replace the DE
lever and ASF
drive switching
gear.
Page heading
position is wrong.
Friction of PF
roller
Check if the PF
roller slips during
the paper feeding.
Clean the PF
roller by the
cleaning sheet.
Replace the PF
roller if the
problem is not
solved.
PE sensor is
defective.
-Check if PE sensor
lever moves
smoothly.
-Check if the
assembly with the
right paper guide is
made correct and
check if there is any
foreign substances.
-Replace the PE
sensor assembly.
-Re-assemble
each part and
remove foreign
substances.
Table 3-7. Repair of the Printer Mechanism
Symptom Condition Cause Check Point Solution
Printer stops
during
initialization
Fatal error
appears.
ASF sensor is
defective.
Check the signal
level of the ASF
sensor.
Replace ASF
sensor.
HP sensor is
defective.
Check the signal
level of the HP
sensor.
Replace HP
sensor.
CR motor is
defective.
Check the CR motor
cable is connected
properly.
Replace the CR
motor if there is
no problem in
the cable
connection.
PF motor is
defective.
Check if the PF
motor cable is
connected properly.
Replace the PF
motor if there is
no problem in
the cable
connection.
Table 3-7. Repair of the Printer Mechanism
Symptom Condition Cause Check Point Solution