Epson DLQ-3000+, Service Manual

Page: 157 / 262

DLQ-3000+
Rev. A
5-18
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.
Table 5-15 Repair of the Printer Mechanism
Condition Cause Check point
Solution
Symptom : CR motor does not rotate properly.
The CR does not move
after printer power is
turned on. Foreign matter is
lodged in the
mechanism. Check point: Move the timing belt manually
to check if the motor rotates.
Solution: Remove the foreign matter.
CR motor is
defective.
Check point: Check the motor coil for
correct resistance (approximately 1.1 ).
(See Table 5-5 and Note.)
Solution: Replace the CR motor or the
main control board.
Symptom : The CR does not move with the printer power on.
CR motor rotates, but
the CR doesn’t move. The drive pulley is
defective. Check point: Check if the pulley is worn or
damaged.
Solution: Replace the drive pulley.
Timing belt is
defective.
Check point: Check if the timing belt is
properly engaged with the or if any of the
belt teeth is broken off.
Solution: Reinstall or replace the timing
belt.
CR moves left a little,
then stops. CR does not move
smoothly.
Check point: Move the CR manually to
check if it moves smoothly.
Solution: Clean and lubricate the CR guide
shaft surface, or replace the CR motor.
(See Chapter 6.)
CR moves to the right
or left end, then stops. HP sensor is
defective.
Check point:
Solution: Replace the HP sensor.
Symptom : Self-test does not run properly.
CR moves without
printing. Head FFC is not
connected properly.
Check point: Check the head FFC visually
for proper connection, damage and bent.
Solution: Replace the head FFC.
Printhead is
defective. Check point: Check the printhead coil for
correct resistance (approximately 8.19 ).
(See Page 5-9.)
Solution: Replace the head FFC.
Particular dots are
missing. Printhead is
defective. Check point: Check if head wires are bent.
Solution: Replace the printhead
Printing color is too
light or uneven. Printhead is
defective.
Check point: Check if head wires are bent.
Solution: Replace the printhead.
Note: In case the CR motor is shortened, check the driver circuit, since it might be also
shortened.