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Troubleshooting
Rev. A
5-11
5.3 Repair of C124 PSB/PSE Board
This section describes how to repair the PSB/PSE board to the component. Table 5-8 shows the
abnormal conditions and corresponding causes, check points and solutions. Select the condition
from the table and perform any necessary check and repair.
Table 5-8. C124 PSB/PSE Board Repair
Condition
Cause
Check point
Solution
Symptom : Normal voltage is not output.
Fuse is blown
out soon after
replaced.
Line filter circuit
is defective.
Check
to
or L4 for a short circuit
with the AC line.
Replace any
defective
component.
Rectification or
smoothing
circuit is
defective.
Check the followings for short circuit:
All (+) terminals between
and
and
(See Note 1.)
Replace the
board,
or any
associated
defective
component.
All output
voltages are
abnormal.
(Due to the
circuit structure,
when the +35 V
Diode bridge
is
defective.
Check that the voltage output from pin
3 (+) and pin 4 (-) on DB101 is as
follows:
: Approximately 170V
: Approximately 300V
(See Note 2.)
Replace the
board,
or any
associated
defective
component.
output is
abnormal, all
other output
voltages are
affected.)
Soft start circuit
(surge circuit) is
defective.
Check that DC voltages at the both
ends of R2 and R3 are 0 V.
R2 and R3 are open,
is bad,
or R124, D103, or
/
which
are used to turn on
is bad.
Replace
board or
any associated
defective
component.
Switching FET
or
is
defective.
Check for the correct switching
operation of
/
by checking if
the waveform output from pins 6 and
7 of the T101/201 primary coil is
correct, as shown below.
Figure 5-9. Switching Waveform
Replace the
/
board,
or any
associated
defective
component.
Notes:
1.
is possibly shortened as a result of the short circuit of other components behind
.
2. Degradation of some component behind
may suppress the
output voltage
Содержание DLQ-3000+
Страница 1: ...EPSON EPSON EPSON France S A SERVICE MANUAL DLQ 3000 PRODUIT ...
Страница 2: ...EPSON 24 PIN DOT MATRIX PRINTER EPSON DLQ 3000 SERVICE MANUAL SEIKO EPSON CORPORATION 4008259 ...
Страница 6: ...v REVISION SHEET Revision Issued Data Contents Rev A August 21 1997 First Release ...
Страница 62: ...2 3 12 Other Sensor Circuits 2 30 ...
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 ...
Страница 254: ...PC 437 USA Europe standard Annexe A 27 ...
Страница 255: ...PC 850 Multilingue PC 860 Portugais PC 863 Français canadien PC 865 Norvégien A 28 Annexe ...
Страница 256: ...PC861 Islandais BRASCII Portugais brésilien Abicomp Portugais brésilien Annexe A 29 ...
Страница 259: ...A 32 Annexe ...
Страница 262: ...Utilisation du sommaire des commandes A 10 V Vitesse 2 25 W Windows Microsoft 1 17 18 Index 3 ...