Station Installation; Preliminary Inspection; Power Connection; Changing The Power Supply Setting For A Different Ac Voltage Range - Yaesu FT-990 Operating Manual

Station Installation
Prelimi11ary Iuspection
Inspect I he transceiver thoroug hJ
y
immediate!
y
upan opening the packing tar ton. Check to see that
all controls and switches work freely, and inspect
the cabinet for any signs of damage. Make sure Lhe
;1ccessory
fus~.s
and plugs pictnrud on page -3 are
included. If any damage is
found document it com-
pletely, - and contact the shipping company (or
dealer, if you putchascd
it over the counter) right
away.
Save the
packing materials in
case you
need
to return the set for
service,
lf you
pu.rchased optional internal accessories
separately, install them as described in
lnslaJiing
Jntt'l'nnl AccesMrii!S
(page
45).
Power Connection
The
Fr~990
is available in an
AC/DC
version,
whichJndud<'S
the EP-25
switching power supply,
and
a DC-only
version.
Page
4.7
describes
DC in-
stallation tor both versionS, while the following
p~ragrapl~
describes only ACpower conn\i(:tions
for the
AC/OC
version.
Before connecting power, check the label on the
rear panel which indica tes the AC
m~inl) voltage
range for which your transceiver
is
curren tly set. If
your ACmains voltage
is
outside of thi;s tange; the
voltage switch
ott
the pawer
supply
in the trans-
ceiver must be reset, and three fuses must be
CAU'T'IO)Il!
Petlllammt
d « II1Clg'C
will
t'i?Slllt
if im-
proper
supply
v oltage is appli-ell to · t he
-tnmsceiver.
Yotrr war.rmrf1J iiots
11 Qt;
cover
tlamagC>
caused
by
applica.t ion
of
iwprop._er
srq1ply
vo1t (lge, or
IISil
(If
im-
propi!r
f uses.
changed. This requires only a screwdriver and is
not difficult (see below),
out you
should make
sure
the power supply is set correcHy before connecting
power.
If you have any doubts about the proce-
dure, ask
your
dealer for help.
You should
~lso
make sure the fuse in the rear
panel fuse holder is (;orrect for your mains voltage:
A C Mains Voltage Fuse Capacity
100 - 117 SA
200-234 4A
After making certain the
AC
voltage for which
the
t:rnnsceiver is set matches your
llUlins voltage,
and that the correct fuse is installed
in
the fuse
holder, connect the
AC
power cotd to the: 3-pln
AC
jack on the rear panel.
Don't
plu!.{ the cord into the
wall until all other transceiver interconnections
have been made.
Cl1angin.g the Power
Supply
Setting for a Different AC Voltage Range
0
Make
c~rtain
that all cables
a~e
disconnected
from the transceiver. Remove the lop cover
qS
shown at l:he top of page 10, <)nd tnc bottom
cov. e r
as shown at the bottom of page 12.
0 Move the switch next to the speaker (see
be-
low) to the required 115 or 230 V
side.
I
•
J
nov--
~~v
0 On the bottom of the chassis (see below)
1
re-
place fuses PH6901 and FH6902 with two of
the supplied fuses: either the 10-A
fus. e s (for
'100- 1'17 VAG) or 5-A (for200- 234 VAC).
0
Rep lace the f·use in the rear panel holder, and
then
replace t]1e cover and the
c.~ rtying
hi!nd.le.
lmpo:ttant!
lf
you ·~hl!nge
tilt'
AC
Vo / f,1!1t
rtmge S#, l tlug_yO!i
mliSt
cJw11ge>
1/te"fwo ill-
lema!
fus~.and th~
fw;e
in
the rfflf tnnel llolsl e r.
Jl/§q l!j:
~ 'ltre
to
cfitmg~
tlte.
vo/tlrgr
marking
011
tllulhll~llitl tlutr~llf
ptuwl
to match
th~
11ew
w llage
setlil!$, Do /11'-~ Jislrs!or~,_
utMu,
JR<eS-
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