Yaesu FRG-100 Operating Manual page 34

0 With the radio on, use a small insulated screw-
driver to adjust VR1005. Rotating the potenti-
ometer clock-wise to increase the volume, and
counter-clockwise to decease it.
0 Beep volume can be confirmed by pressing a
front-panel button, or by using the beep tone
frequency setting to enable a continuous tone
while adjusting the volume (see page 19). You
may now replace the cover.
Optional C W Crystul Filters
A 500-Hz YF-11 O C or 250-Hz YF-11 OCN crystal
filter may be installed for CW narrow reception
(they cannot both be installed, as they use the same
Fig. 4 YF-11OCICN Narrow CW Filters
Fig. 5 Filter Installation
r=>
Fig. 6 Fuse Replacement
mounting location).
0 Referring; to Fimre 2, determine the location of
PI001 & " P I 005 and the nylon mounting stand-
offs.
0 Straddle the crystal filter unit across Pi001
&
P1002, while carefully aligning the pins pro-
truding from the board to the connector holes at
the ends of the filter unit. Filter orientation is not
critical since it will fit when mounted in either
direction.
0 When the filter unit has been mated to the con-
nector pins, gently press down by the endsuntil
the nylon mounting stand-offs push through
the holes in the filter unit board and expand to
lock it in place (Figure 5). You may now replace
the cover.
Fuse Replacement
The internal fuse should not normally require
replacement. If it blows, first determine the cause
before installing a replacement. Fuse rating should
never be exceeded, and replacement should be
with that of an identical voltage and current rating.
0 Ensure that the power is disconnected and ca-
bles removed.
0 Locate fuse FH1001 at the upper right corner of
the PCB, next to the
DC
12
V
IN jackbee Fig.
6).
0 Using a small fuse pulling tool, firmly grasp the
fuse and pull it straight up and out of its holder.
Caution!
Fuse replacement using other thnn n fuse
pulling tool is not recomnzended due to the
possibility of fuse brenknge, and damage to
surrounding components.
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