Epson DLQ-3000+ Service Manual page 156

Condition



Symptom : Abnormal printing (continued)
(continued) Fuse F1 is
defective.
PG motor is not
functioning
properly.



Symptom : Paper is fed abnormally.
PF motor is not PF motor driver
functioning circuit is
properly. defective.



Symptom :The control panel is not functioning properly.
 '
Buttons, or Control panel


control circuit is
operation is
defective.
abnormal.



Symptom : Abnormal data transmission between the host computer and the printer.
Communication Any of the
interface parts is
error has
occurred or data defective.
is garbled.





Symptom : The default settings are not stored.
$

defective or
abnormal writing
operation to the
$
Rev. A
Table 5-14. Repair of C210 MAIN Board (continued)
Cause
Check is the fuse F1 is blown out. If it
is, check peripheral parts before
replacing the fuse in case they are
also shortened due to the fuse
problem.
Check pin 5,6,16 and 17 of IC6 for
input signal waveform and pin 1,8,11
and 18 of
waveform.

If no motor phase input signals is
input, gate array

If no drive waveforms is output,
is defective.

Check that the harness for the
control panel is securely connected
to the control circuit board.

Check If the harness is not
damaged. IF not, the
gate array
Replace the interface cable and run
the self-test.
If the self-test runs normally, any of
the interface parts is defective.
is defective.
is
.
Check point


for output signal


is defective.
Figure 5-16. PF motor Drive Waveform


is defective.


Troubleshooting
Replace the
main control
board or any
bad parts.
Replace the
main control
board or


Replace the
control panel or
main control
board.



( ) or
Replace the
main control
board.
Replace the
main control
board.
Solution


.
5-17