Yaesu FT-767GX, Operating Manual

Page: 14 / 40

PATCH IN
is a phono jack which accepts
transmitter audio input from a phone
patch, external AFSK generator or other
source with 600 ohms impedance.
Optimum
input level is 2 m Vrms. The MIC control
on the front panel affects this input.
F SK
is a phono jack which provides
8
VDC
whenever the FSK mode is selected. This
may be used as a control line for your
terminal unit (to turn it off when oper­
ating on other modes).
( 13)
FUSE
Holder
For 100 - 117 VAC oper',ation, install a IOA
fuse here. For 200 - 23� VAC operation in­
stall a SA fuse.
(14) AC
Jack
After ensuring that the iii.stalled fuse has the
correct rating for the AC voltage to be used,
connect the mating end of the supplied AC
cable to this 3-pin jack.
(15) ANT
Coaxial Jack
This type 'M' (S0-239) jack is for connection
of your hf antenna, or linear amplifier input.
Optimum impedance is 50 ohms, unbalanced.
FT-767GX POWER TRANSFORMER VOLTAGE SELECTION
If your local
AC
mains voltage does not match the label on the rear of the FT-767GX, the taps on the
primary winding of the power transformer in the FT-767GX should be changed according to the following
procedure. Make sure to change the label on the rear of the transceiver to match the new voltage after
changing the taps.
1) Disconnect all cables from the transceiver.
2) Remove the two screws affixing each VHF or
UHF Band Module, and slide the modules out of
the transceiver (Figure 1).
3) Remove the two screws at the front of the top
cover (heatsink, see Figure 2).
4)
Place the transceiver upside down, and remove
the four screws from the bottom corners and
two on each side (including the carrying handle
screws, see Figure 3). Then remove the handle
and the bottom cover.
5) Referring to Figure
4,
remove the seven black
painted screws from the rear panel. Then
remove the (black) outer rear panel.
6) Referring to Figure 5, remove the ten screws
from the inner rear panel, and remove this
panel.
7) Remove one screw from each side, as indicated
in Figure 6.
8 )
Locate the white molex connectors (for power
and loudspeaker) inside the rear of the chas­
sis, and disconnect them.
9)
Fold the lower half of the chassis away from
the upper half, placing a book or similar
support of about the same thickness as the
heatsink under the bottom half as shown in
Figure
8.
10) Remove the seven screws from the shield
cover on the inside of the heatsink, as shown
in Figure
9.
11) Locate the power transformer (Figure
IO ) ,
and
change the wiring as indicated by the labels
on the transformer.
12) Reassemble the transceiver in the reverse
order of disassembly, and change the voltage
label on the rear panel to match the new
transformer voltage.
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