Sigtronics RES-601 Installation Instructions - Manual (Page 2)

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AIRCRAFT
PANEL
Figure 1
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Figure 2 Microphone Jack
page 2
Panel Preparation:
1. Position the adhesive drill template on the aircraft panel
in the selected area.
2. Center punch each hole at cross lines. (The five holes
are in a straight line and equally spaced 0.4” apart.)
3. Drill a 1/8” pilot hole in all five places.
4. Enlarge one hole to 1/2” and two holes to 3/8” per
template.
Mounting Chassis: See Figure 1
1. Remove the nut from the SPA ON/OFF switch bushing.
2. Remove the knobs from the VOLume and SQuelch
controls using a 0.050 inch Allen wrench. NOTE: DO
NOT REMOVE nuts from the VOLume and SQuelch
control potentiometers.
3. Insert the SPA unit from rear of the aircraft panel with the
appropriate arrow on the unit chassis pointing upwards.
4. Install the panel and lightly thread the nut on to the
ON/OFF switch. The nuts on the VOLume and SQuelch
controls should fit inside the 3/8” diameter holes drilled
in aircraft panel.
5. Install and tighten the two 4-40 screws through holes in
SPA panel. Tighten the ON/OFF switch nut.
6. Install the knobs on the VOLume and SQuelch control
shafts and tighten the Allen screws.
RES-401 / 601 SWITCHER CHASSIS
INSTALLATION
1. As in mounting the intercom, select a mounting location
that will not cause interference with flight controls. Mount
the RES Switcher unit within 3 feet of the SPA intercom
to allow connection of J1 and P1.
2. Remove the four corner (smaller) panel screws and
remove the RES unit from its chassis box.
3. Drill four mounting holes in the aircraft with same hole
pattern as in the switcher chassis. Use a #27 drill.
(Clearance drill for 6-32”)
4. Secure the chassis to the aircraft with the four 6-32
screws and nuts provided. The screw heads should be
inside switcher chassis for circuit board clearance. Care
should be taken not to crush grommets while applying
torque to screws.
5. Replace the RES unit in the chassis box and secure.
SWITCHER HARNESS INSTALLATION
1. Using the Music Switch Panel for a guide, select an area
on the aircraft panel and drill 1/4” diameter holes for the
MUSIC ON/OFF and PILOT/ALL Switches.
2. Mount the switches with the bushing key slots down. The
smaller switch (MUSIC ON/OFF) mounts on the right.
3. Place the printed switcher panel over the switch bushings
and install and tighten the two switch nuts.
4. Route the cable harness to the Switcher unit clear of
aircraft controls. Secure with suitable wire ties.
MOUNTING HEADPHONE AND
MICROPHONE JACKS
1. Locate the mounting areas. One mic and one headphone
jack required for each headset.
2. Drill 3/8” diameter holes for headphone jacks and install.
The terminals on the stereo phone jacks may be identified
per the mic jack shown in Figure 2 above. The phone jack
bushings (sleeve terminal) must be grounded to airframe
or wired to aircraft ground.
3. Drill 1/2” diameter holes for mic jacks and install with
insulating washers supplied. See Figure 2.
Note: If the aircraft already has headset jacks (not including
the hand mic jack), they can be used for this system, however,
any existing wires must be removed and the jacks must be
wired as shown in Figure 3 on page 3. Additionally, if any
existing mic jack is mounted in metal, insulating washers
must be installed and the barrel connection wired back to
Point “A”.