
Troubleshooting
Rev. A
5-15
Table 5-12. Repair of C210 MAIN Board
Condition
Cause
Check point
Solution
Symptom :An error has occurred.
“Fatal error”
+35 VDC line
monitor circuit is
defective.
Check the voltages output from pin
88 and pin 89 of IC16.
If the output voltages are correct,
CPU is defective.
Replace the
main control
board or
PSB
/
PSE
board.
CR control circuit
is defective.
Check pins 5, 6, 16 and 17 of
IC7
for
input signal waveform and pins 1, 8,
11 and 18 for output signal
waveform.
−
If the motor phase signal is not
input, gate array
IC25
is defective.
−
If the drive waveform is not output,
IC7
is defective.
Figure 5-13. CR Motor Drive Waveform
Replace the
main control
board or
IC7
.
Sensors are not
functioning
properly.
Sensor circuit is
defective.
Check pin 85 of
IC16
for the correct
reference voltage. (+5 V).
−
If it’s normal, CPU is defective.
−
If it is abnormal, shunt-regulator
IC19 and its peripheral parts or the
electrical circuit is defective.
Replace the
main control
board or
PSB/
PSE
board.
Summary of Contents for DLQ-3000 Minerva+
Page 1: ...EPSON 24 PIN DOT MATRIX PRINTER EPSON DLQ 3000 SERVICE MANUAL SEIKO EPSON CORPORATION 4008259 ...
Page 5: ...v REVISION SHEET Revision Issued Data Contents Rev A August 21 1997 First Release ...
Page 61: ...2 3 12 Other Sensor Circuits 2 31 ...
Page 160: ...Chapter 6 Maintenance 6 1 Maintenance 6 1 6 1 1 Lubrication and Adhesion 6 1 ...
Page 171: ...DLQ 3000 Rev A A 6 ...
Page 172: ...Appendix Rev A A 7 A 2 Circuit Diagrams Figure A 2 C210 MAIN Board Circuit Diagram 1 2 ...
Page 173: ...DLQ 3000 Rev A A 8 ...
Page 174: ...Appendix Rev A A 9 Figure A 3 C210 MAIN Board Circuit Diagram 2 2 ...
Page 175: ...DLQ 3000 Rev A A 10 ...
Page 177: ...DLQ 3000 Rev A A 12 Figure A 5 C124 PSB Board Circuit Diagram ...
Page 180: ...Appendix Rev A A 15 Figure A 8 C210 MAIN Board Component Layout 2 2 ...
Page 181: ...DLQ 3000 Rev A A 16 Figure A 9 C124 PSB Board Component Layout ...
Page 182: ...Appendix Rev A A 17 Figure A 10 C124 PSE Board Component Layout ...
Page 189: ...EPSON SEIKO EPSON CORPORATION ...