Epson DLQ-3000 Service Manual page 156

Condition
T T
Symptom : Abnormal printing (continued)
(continued) Fuse F1 is
defective.
PG motor is not
functioning
properly.
T T
Symptom : Paper is fed abnormally.
PF motor is not PF motor driver
functioning circuit is
properly. defective.
T T
Symptom :The control panel is not functioning properly.
Buttons, LEDs or Control panel
LCD operation is control circuit is
abnormal. defective.
T T
Symptom : Abnormal data transmission between the host computer and the printer.
Communication Any of the
error has interface parts is
occurred or data defective.
is garbled.
CPU is defective.
T T
Symptom : The default settings are not stored.
EEPROM is
defective or
abnormal writing
operation to the
EEPROM.
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 IC6 for output signal
waveform.
If no motor phase input signals is
input, gate array IC25 is defective.
If no drive waveforms is output, IC6
is defective.
Y
Check that the harness for the
control panel is securely connected
to the control circuit board.
Y
Check If the harness is not
damaged. IF not, the CPU (IC10) or
gate array IC25 is defective.
Replace the interface cable and run
the self-test.
If the self-test runs normally, any of
the interface parts is defective.
Check point
Figure 5-16. PF motor Drive Waveform
Troubleshooting
Solution
Replace the
main control
board or any
bad parts.
Replace the
main control
board or IC6.
Replace the
control panel or
main control
board.
Replace the
main control
board.
Replace the
main control
board.
5-17