Epson DLQ-3000 Service Manual page 158

Condition
T T
Symptom : Self-test does not run properly. (continued)
PG adjustment
mechanism is not
properly functioning.
T T
Symptom : Paper feeding is abnormal.
Y
The printer prints,
but does not feed
paper.
Y
Paper is not fed at a
constant speed.
T T
Symptom : Ribbon feeding is abnormal.
Ribbon is not fed.
Note: In case the PG/PF/ribbon motor coil is shortened, check the driver circuit, since it might be
also shortened.
Rev. A
Table 5-16. Repair of the Printer Mechanism
Cause
Platen gap is not
adjusted properly.
PG motor is
defective.
PGHP sensor or PG
sensor is defective.
Foreign matter is
lodged in the paper
path.
PF motor is not
driven properly.
PF motor is
defective.
Ribbon cartridge is
defective.
Foreign matter is
lodged in the ribbon
feed gear train.
Ribbon motor is
defective.
Check point
Solution
Y
Check point: Check for the proper platen
gap.
Y
Solution: Adjust the platen gap.
(See Chapter 4.)
Y
Check point:
Check the PG motor coil for proper
resistance (approximately 250
(See Table 5-5 and Note.)
Y
Solution] Replace the PG motor.
Y
Check point: Check PGHP sensor.
(Refer to Table 5-7.)
Y
Solution: Replace the sensor.
Y
Check point: Check the paper path
visually.
Y
Solution] Remove the foreign matter.
Y
Check point: Check if the motor or gear
has any foreign matter lodged, or if they are
worn or damaged.
Y
Solution: Remove the foreign matter or
replace the PF motor or the gear.
Y
Check point: Check the PF motor coil for
proper resistance (approximately 5.4
(See Table 5-5 and Note.)
Y
Solution: Replace the PF motor. (Replace
the driver also, if necessary.
Y
Check point: Remove the ribbon cartridge;
then turn the ribbon feed knob to check if
the ribbon is properly fed.
Y
Solution: Replace the ribbon cartridge.
Y
Check point: Run the self-test to check if
the ribbon is properly fed.
Y
Solution: Remove the foreign matter or
replace defective parts in the ribbon feed
mechanism.
Y
Check point: Check the ribbon motor coil
for correct resistance (approximately 76
).(See Table 5-5 and Note.)
Y
Solution: Replace the ribbon motor.
Troubleshooting
).
).
5-19