DLQ-3000+
Rev. A
5-12
Table 5-9. C124 PSB/PSE Board Repair (continued)
Condition
Cause
Check point
Solution
Symptom : Normal voltage is not output. (continued)
(continued)
All output
voltages are
abnormal.
or
is
defective.
Check
for the followings:
Pins 6/7 for the input voltage to the
primary coil
Output voltage of the corresponding
pins on the secondary side.
(See Note 1.)
Replace the
board,
or any
associated
defective
component.
Diode
or
is
defective.
Check that the correct voltage (+35V)
is output from the both terminals of
.
If no voltage is output,
is
defective.
Replace the
board,
or any
associated faulty
part.
Over current
protection circuit
is defective.
Check the transistor
(Collector is at Gp level.)
If it’s on, Q153/Q253 or other
peripheral circuit part is defective.
If it’s off, PC102 or components
behind or Q101/Q201 in the main
switching circuit is defective.
Replace the
board,
or any
associated faulty
part.
Over voltage
protection circuit
is defective.
Check the transistor
.
(Collector is at Gp level.)
If it’s on,
or a peripheral
part of
is defective.
If it’s off, a circuit part behind
or
in the main switching circuit
is defective.
Check if
is on because the
voltage for
line is abnormally
high.
If it’s on,
or a peripheral
circuit part is defective.
If it’s off,
is defective.
(See Note 2.)
Replace the
board,
or any
associated faulty
part.
Notes:
1. Degradation
of a component behind the secondary coil may suppress the T101/ T201
output voltage.
2.
Once
photo-thyristor) turns on, it does not turn off until
is discharged. Therefore, be
sure to wait for a few minutes before turning the power on again.
Summary of Contents for DLQ-3000+
Page 1: ...EPSON EPSON EPSON France S A SERVICE MANUAL DLQ 3000 PRODUIT ...
Page 2: ...EPSON 24 PIN DOT MATRIX PRINTER EPSON DLQ 3000 SERVICE MANUAL SEIKO EPSON CORPORATION 4008259 ...
Page 6: ...v REVISION SHEET Revision Issued Data Contents Rev A August 21 1997 First Release ...
Page 62: ...2 3 12 Other Sensor Circuits 2 30 ...
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 ...
Page 254: ...PC 437 USA Europe standard Annexe A 27 ...
Page 255: ...PC 850 Multilingue PC 860 Portugais PC 863 Français canadien PC 865 Norvégien A 28 Annexe ...
Page 256: ...PC861 Islandais BRASCII Portugais brésilien Abicomp Portugais brésilien Annexe A 29 ...
Page 259: ...A 32 Annexe ...
Page 262: ...Utilisation du sommaire des commandes A 10 V Vitesse 2 25 W Windows Microsoft 1 17 18 Index 3 ...