
DLQ-3000+
Rev. A
5-16
Table 5-13. Repair of C210 MAIN Board (continued)
Condition
Cause
Check point
Solution
Symptom : Abnormal printing
Printhead
control circuit
operates
abnormally.
Printhead control
circuit is
defective.
If some particular dots are missing or
bad, check which head driver is
causing the problem, the driver for
print pulse A or B.
−
If any of the drivers is bad, see the
circuit diagram and replace the
corresponding drive transistors (
Q6
to
Q33
,
QM3
to
QM10
). (See Note 1.)
−
If both drivers are good, gate array
IC25
is defective.
Figure 5-14. Head Drive Signal Waveform
Replace the
main control
board or
associated
component.
Printhead driver
circuit is
defective.
Check pin 3 of 3-terminal regulator
IC17
for the correct output voltage
(+12
V).
If it’s correct, gate array
IC25
is
defective.
Replace the
main control
board or any
associated part.
PG motor is not
functioning
properly.
PG motor driver
circuit is
defective.
Check pins 1,3,5,and 7 of
QM1
for the
input signal waveform and pins
15/16, 13/14, 11/12 and 9/10 of
QM1
for output signal waveform.
−
If no motor phase input signals is
input, gate array
IC25
is defective.
−
If no drive waveforms is output,
QM1
is defective.
Figure 5-15. PG Motor Drive waveform
Replace the
main control
board or any
associated
parts.
Note:
1.
HD
-No. shown in the diagram and corresponding dot No. are the same.
Содержание DLQ-3000 Minerva+
Страница 1: ...EPSON 24 PIN DOT MATRIX PRINTER EPSON DLQ 3000 SERVICE MANUAL SEIKO EPSON CORPORATION 4008259 ...
Страница 5: ...v REVISION SHEET Revision Issued Data Contents Rev A August 21 1997 First Release ...
Страница 61: ...2 3 12 Other Sensor Circuits 2 31 ...
Страница 160: ...Chapter 6 Maintenance 6 1 Maintenance 6 1 6 1 1 Lubrication and Adhesion 6 1 ...
Страница 171: ...DLQ 3000 Rev A A 6 ...
Страница 172: ...Appendix Rev A A 7 A 2 Circuit Diagrams Figure A 2 C210 MAIN Board Circuit Diagram 1 2 ...
Страница 173: ...DLQ 3000 Rev A A 8 ...
Страница 174: ...Appendix Rev A A 9 Figure A 3 C210 MAIN Board Circuit Diagram 2 2 ...
Страница 175: ...DLQ 3000 Rev A A 10 ...
Страница 177: ...DLQ 3000 Rev A A 12 Figure A 5 C124 PSB Board Circuit Diagram ...
Страница 179: ...DLQ 3000 Rev A A 14 A 3 Circuit Board Component Layout Figure A 7 C210 MAIN Board Component Layout 1 2 ...
Страница 180: ...Appendix Rev A A 15 Figure A 8 C210 MAIN Board Component Layout 2 2 ...
Страница 181: ...DLQ 3000 Rev A A 16 Figure A 9 C124 PSB Board Component Layout ...
Страница 182: ...Appendix Rev A A 17 Figure A 10 C124 PSE Board Component Layout ...
Страница 189: ...EPSON SEIKO EPSON CORPORATION ...