Epson 2070 Service Manual - Page 140

Symptom, Cause, Checkpoint, Solution, Troubleshooting, LQ-2070 Service Manual, Connect the FFC

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Troubleshooting LQ-2070 Service Manual Table 5-8. Repairing the Printer Mechanism Problem Abnormal paper feed ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ Symptom Cause The PF motor does not rotate at all. CN10 is disconnected from the main board. When the printer is powered on, buzzer sounds continuously The both rear and front PE sensors are not mounted correctly. Any foreign object is jaming on the both rear and front PE sensors. When the printer is powered on, paper is ejected automatically, and then the printer becomes Ready. A foreign substance is sticking to the surface of the PW sensor. The PW sensor is defective. When the printer is powered on, paper is ejected automatically, and then the printer signals a paper end error. ( on the friction mode) A foreign object is jammed between the platen and rear/front PE sensor. CN5 or CN6 is disconnected. The rear/front PE sensor is defective. When paper is loaded, it is ejected automatically. The FFC (CN7) for the PW sensor is disconnected. The FFC is broken. The PW sensor is defective. Checkpoint Check CN10. Solution Connect CN10 correctly. Check the both sensors mounting position. Mount the rear and front PE sensors into the proper positions. Check the both paper paths. Remove any foreign object. Check the surface of the PW sensor. Remove the ribbon mask holder assembly, and remove any foreign objects. Check the operation of the PW sensor. Refer to page 5-2. Replace the PW sensor. Refer to page 3-9. Remove the platen, and check the paper path. Refer to page 3-10. Remove the platen and remove any foreign object. Refer to page 3-10. Check the connectors. Connect the connector properly. Check the operation of the rear/front PE sensor. Refer to page 5-2. Replace the rear/front PE sensor. Refer to page 3-23. Check the connector. Connect the FFC properly. Check the continuity of the FFC using a multimeter. Replace the FFC. Check the operation of the PW sensor. Refer to page 5-2. Replace the PW sensor. Refer to page 3-8 and 3-9. 5-18 Rev. A

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Table 5-8. Repairing the Printer Mechanism
Problem
Symptom
Cause
Checkpoint
Solution
Abnormal
paper feed
The PF motor does
not rotate at all.
CN10 is
disconnected
from the main
board.
Check CN10.
Connect CN10
correctly.
^
When the printer is
powered on, buzzer
sounds continuously
The both rear
and front PE
sensors are not
mounted
correctly.
Check the both
sensors
mounting
position.
Mount the rear
and front PE
sensors into the
proper
positions.
^
Any foreign
object is jaming
on the both rear
and front PE
sensors.
Check the both
paper paths.
Remove any
foreign object.
^
When the printer is
powered on, paper
is ejected
automatically, and
then the printer
becomes Ready.
A foreign
substance is
sticking to the
surface of the
PW sensor.
Check the
surface of the
PW sensor.
Remove the
ribbon mask
holder assembly,
and remove any
foreign objects.
^
The PW sensor
is defective.
Check the
operation of the
PW sensor.
Refer to page 5-2.
Replace the PW
sensor. Refer to
page 3-9.
^
When the printer is
powered on, paper
is ejected
automatically, and
then the printer
signals a paper
end error.
( on the friction
mode)
A foreign object
is jammed
between the
platen and
rear/front PE
sensor.
Remove the
platen, and
check the paper
path. Refer to
page 3-10.
Remove the
platen and
remove any
foreign object.
Refer to page
3-10.
^
CN5 or CN6 is
disconnected.
Check the
connectors.
Connect the
connector
properly.
^
The rear/front
PE sensor is
defective.
Check the
operation of the
rear/front PE
sensor.
Refer to page 5-2.
Replace the
rear/front PE
sensor. Refer to
page 3-23.
^
When paper is
loaded, it is
ejected
automatically.
The FFC (CN7)
for the PW
sensor is
disconnected.
Check the
connector.
Connect the FFC
properly.
^
The FFC is
broken.
Check the
continuity of the
FFC using a
multimeter.
Replace the FFC.
^
The PW sensor
is defective.
Check the
operation of the
PW sensor.
Refer to page 5-2.
Replace the PW
sensor. Refer to
page 3-8 and
3-9.
Troubleshooting
LQ-2070 Service Manual
5-18
Rev. A