Repair Of The Printer Mechanism - Epson DLQ-3000 Service Manual

DLQ-3000+

5.5 Repair of the Printer Mechanism

This section consists of tables which contains symptoms, conditions, causes, check points and
solutions you need in troubleshooting problems with units in the printer mechanism.
Condition
T T
Symptom : CR motor does not rotate properly.
The CR does not move
after printer power is
turned on.
T T
Symptom : The CR does not move with the printer power on.
CR motor rotates, but
the CR doesn't move.
CR moves left a little,
then stops.
CR moves to the right
or left end, then stops.
T T
Symptom : Self-test does not run properly.
CR moves without
printing.
Particular dots are
missing.
Printing color is too
light or uneven.
Note: In case the CR motor is shortened, check the driver circuit, since it might be also
shortened.
5-18
Table 5-15 Repair of the Printer Mechanism
Cause
Foreign matter is
lodged in the
mechanism.
CR motor is
defective.
The drive pulley is
defective.
Timing belt is
defective.
CR does not move
smoothly.
HP sensor is
defective.
Head FFC is not
connected properly.
Printhead is
defective.
Printhead is
defective.
Printhead is
defective.
Check point
Solution
Y
Check point: Move the timing belt manually
to check if the motor rotates.
Y
Solution: Remove the foreign matter.
Y
Check point: Check the motor coil for
correct resistance (approximately 1.1 ).
(See Table 5-5 and Note.)
Y
Solution: Replace the CR motor or the
main control board.
Y
Check point: Check if the pulley is worn or
damaged.
Y
Solution: Replace the drive pulley.
Y
Check point: Check if the timing belt is
properly engaged with the CR or if any of
the belt teeth is broken off.
Y
Solution: Reinstall or replace the timing
belt.
Y
Check point: Move the CR manually to
check if it moves smoothly.
Y
Solution: Clean and lubricate the CR guide
shaft surface, or replace the CR motor.
(See Chapter 6.)
Y
Check point:
Y
Solution: Replace the HP sensor.
Y
Check point: Check the head FFC visually
for proper connection, damage and bent.
Y
Solution: Replace the head FFC.
Y
Check point: Check the printhead coil for
correct resistance (approximately 8.19 ).
(See Page 5-9.)
Y
Solution: Replace the head FFC.
Y
Check point: Check if head wires are bent.
Y
Solution: Replace the printhead
Y
Check point: Check if head wires are bent.
Y
Solution: Replace the printhead.
Rev. A