EPSON Stylus Photo 720 / EPSON Stylus Photo EX3
Revision A
Troubleshooting
Unit Repair (Control Board)
59
Paper feed
operation is
abnormal.
PF motor does not
revolve.
IC2 is
broken.
Check the PHASE (Pin
16,27) of IC 14, and signal
waveform of OUT (Pin
7,6,9,8).
If PHASE
signal is not
input, replace
IC2.
IC14 is
broken.
Check if waveform of OUT
(Pin 7,6,9,8) is output from
IC14.
If OUT is not
output from
IC14, replace
IC14.
Abnormal
printing
Printing is not
performed or the
print data is turned
to the set of
unrecognizable
characters.
IC2 is
broken.
Check the signal waveform of
DATA (Pin 29) of IC15 and
Common NPNB/PNPB(Pin
20/16).
If DATA is
not input,
replace IC2.
IC15 is
broken.
Check the output waveform
of NPNB/PNPB, FB of IC15.
If no output
signal of
NPNB/
PNPB, FB
from IC15,
replace IC15.
Table 3-6. Repair of the Control Board
Symptom
Condition
Cause
Check point
Solution
Содержание Stylus Photo 720
Страница 5: ...Revision Status Revision Issued Date Description Rev A April 6 2000 First Release ...
Страница 8: ...C H A P T E R 1 PRODUCTDESCRIPTION ...
Страница 29: ...C H A P T E R 2 OPERATINGPRINCIPLES ...
Страница 51: ...C H A P T E R 3 TROUBLESHOOTING ...
Страница 64: ...C H A P T E R 4 DISASSEMBLYANDASSEMBLY ...
Страница 94: ...C H A P T E R 5 ADJUSTMENT ...
Страница 114: ...C H A P T E R 6 MAINTENANCE ...
Страница 121: ...C H A P T E R 7 APPENDIX ...
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