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Service Manual
Troubleshooting
5.4
REPAIR OF THE
MAIN BOARD ASSEMBLY
This section provides detailed troubleshooting methods to isolate components in the
MAIN
board. This information is for use by servicers who repair to the component level. U.S. servicers
repair to the unit
only, and may ignore this section.
The table below provides instructions to repair the
MAIN board assembly. It describes
various symptoms, likely causes, troubleshooting checkpoints, and solutions. The checkpoints
column describes proper waveforms, resistance values, and other values to check when evaluating
the operation of a component that may be defective. Check these values and
the board as
described in the solution column.
-
,
Table 5-6.
MAIN Board Assembly Component Repair
Symptom
Cause
Checkpoint
Solution
The printer
The
signal
Measure the voltage level of the
Replace the
does not
was sent to the Cl 17
signal at CN1 or check the
head driver.
operate at all.
board
head driver
voltage waveform.
(a HIGH level turns
off the power supply).
The
signal
Check the voltage waveform for the
Replace the
(HIGH level) was not
signal
when power is turned on
head driver
sent to the Cl 17
and verify the voltage waveform for the
or gate array.
power supply board.
head driver. (Refer to the head driver
(If
is output to
waveform figure, above.)
the power supply,
and the head driver is
,66s
A -000s
not
defective, the
.
gate array is probably
defective.)
I
2V
The reset circuit is
Look at the voltage waveform
for the
Replace
not operational (for
+5 V line (pin 3 of
and the reset
logic).
signal (pin 1 of
SAVE
V24 ,80V
—
—
PE
Rev.
5-17
Содержание C117001-N - DFX 5000+ B/W Dot-matrix Printer
Страница 1: ...EPSON TERM NAL PR DFX 5000 NTER SERVICE MANUAL EPSON ...
Страница 152: ...DFX 5000 Service Manual Troubleshooting Table 5 5 C117 PSB PSE Board Assembly Component Repair continued Rev A 5 15 ...
Страница 153: ...Ttvublestmting mx 60 Serv ce Ahmu8J Table 5 5 C117 PSBIPSE Board Assembly Component Repair continued 6 16 Rev A ...
Страница 155: ...Troubleshooting DlW50 Service Wnual Table 5 6 C117 MAIN Board Assembly Component Repair continued u 5 18 Rev A ...
Страница 158: ...DFX 5000 Service Manual Troubleshooting Table 5 6 C117 MAIN Board Assembly Component Repair continued Rev A S 21 ...
Страница 159: ...Troubleshooting DF 50tM Service Manual Table 5 6 C117 MAIN Board Assembly Component Repair continued k f L J s 22 Rev A ...
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Страница 170: ...DFX 5000 Sewice Manual Maintenance and Lubrication In Figure 6 4 Lubrication and Adhesive Diagram 3 Rev A S 5 ...
Страница 180: ...DFX 5000 Service Manual Appendix O I 1 T I I J I Figure A 3 C117 PSB Board Assembly Circuit Diagram Rev A A 1 1 ...
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