Alignment - Yaesu FT-2500M Technical Supplement

Alignment
The FT-2500M has been carefully aligned
at
the factory
for
the specified performance across
the amateur band. Realignment should therefore
not be necessary except
in
the event of
a
compo-
nent failure.
A11
component replacement and
service should be
performed only by an
autho-
ized
Yaesu representative,
or the warranty pol-
icy maybe voided.
The following
procedures cover
the
some-
times critical and tedious adjustments that
are
not normally required once the transceiver has
left the factory. However,
if
damage occurs and
some
parts are replaced,
realignment may be re-
quired.
If
a sudden problem occurs
during nor-
mal
operation,
it
is likely
due
to
component
failure; realignment should not be done
until
af-
ter the
faulty
component has been
replaced.
We recommend
that servicing be performed
only
by
authorized Yaesu service technicians
who
are experienced
with
the
circuitry
and
fully
equipped for repair and alignment. Therefore,
if
a fault is
suspected, contact
the
dealer from
whom
the transceiver was purchased
for instruc-
tions regarding repair. Authorized
Yaesu service
technicians realign
all
circuits and make
com-
plete performance
checks
to
ensure compliance
with
factory
specifications
after replacing
any
faulty
components.
Those
who do undertake any of the following
alignments
are
cautioned to proceed at their
own
risk. Problems
caused
by unauthorized attempts
at realignment
are
not
covered
by
the warranty
policy. Also,
Yaesu
must
reserve
the right
to
change
circuits and alignment procedures in the
interest of improved performance,
without noti-
fyit
g owners.
Under no
circumstances
should any
align-
ment be attempted unless the
normal
function
and operation of the transceiver are clearly un-
derstood, the cause of the
malfunction
has been
Case
Disassembly
n
D
Make sure the transceiver is off. Remove the
two
screws
from
each
side of the top and bot-
tom
covers, then loosen the
two
rear
screws.
Next remove the top and bottom
covers, the
CNTL Unit is now
accessible
from the top of
the
chassis.
To
expose the
Main Unit
PCB on the
bottom of
the transceiver
chassis,
remove the 5
screws
affixing
the shield cover plate, and remove the
cover.
MAIN
Unit
VCO Unit
DISPLAY
Unit
CNTL
Unit_
MIC Unit
FT-2500M Technical Supplement
2-5