2
Checking and
replacing parts
2.
Checking and replacing parts
When replacing
the entire amplifier or (ii) printed cir-
cuit board SF-CA card (see Section
perform the items
in the note.
Remove the
on the SF-CA card (see
Appendix
from the old card and mount it on the
new card in the following manner.
How to replace the
(1) Using the ROM extractor listed in Table
Appendix 12,
"Maintenance instruments",
from the new amplifier (or SF-CA
it.
of
remove the
card) and store
Then,
remove the
from the old amplifier (or
CA card) and mount it on the new amplifier (or SF-CA
card).
(3) Last,
mount the
which was extracted from the new
amplifier (or SF-CA card) on the old amplifier (or
CA card).
How to extract
Arm
Widen the arms of the
ROM extractor in the
arrow direction as shown
in the left-hand figure
and insert both the hooks
under the ROM.
Narrow the width of the
arms,
place them on both
the ends of the ROM,
and gradually extract
the ROM extractor in the
straight direction per-
pendicular to the printed
circuit board (without
swinging it horizontally
and vertically).
ROM extractor
Summary of Contents for FREQROL-SF
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