Midland 70-1341, Service Manual

Page: 22 / 68

INSTALLATION
70-1341/1344/1441/1444
Titans using Deluxe Control Heads (70-1344/70-1444)
do not have an internal speaker. Instead, a separate
3.2

external speaker (70-2357, included with the
70-1344/1444 package) must be installed and
connected to the Control Head.
POWER

Connections
The Titan low-power transceiver comes with a power
cable assembly equipped with two unterminated
14-gauge wires (two meters in length for Under-Dash
units, six meters in length for Trunk-Mount units) for
connection to the vehicle electrical system.
Connect the black wire to the negative (

) chassis
ground of the vehicle. DO NOT ATTEMPT TO
INSTALL THE TRANSCEIVER IN A POSITIVE
GROUND VEHICLE. A large bolt that screws into the
metallic vehicle body or chassis often provides an
adequate ground if a lug is used to secure the wire to
it.
Connect the red wire to the positive (+) side of the
vehicle electrical system. Because of current
requirements, connection to an existing fused circuit
should be avoided to prevent overload of that fuse.
This wire has its own in-line fuse for protection against
wire penetration and transceiver defect. The
connection can be made to the ignition hot so that the
transceiver switches on with ignition, or it can be made
to battery hot to enable the last-selected-feature of the
transceiver (the transceiver must be turned off
separately). Either connection is usually available in
the vehicle fuse block if the red transceiver wire is
terminated with an appropriate lug.

Requirements
The Titan transceiver is designed to operate from a
12
V DC negative ground automotive electrical
system. Current drain of at least 10 A should be
expected. Inspection of the vehicle is recommended
prior to installation. A low battery or other electrical
system defects may degrade transceiver performance.
CAUTION: Check the voltage source before
connecting the power cable. Too much voltage (above
16 V) can severely damage the transceiver.
ANTENNA
The communications system component that can
affect overall performance the most is the antenna. A
good quality antenna designed to provide 50

terminating impedance at appropriate transceiver
frequencies is recommended. When adjusting the
antenna, be sure to follow its manufacturer's
instructions. A better quality SWR meter should be
used to accurately measure minimum reflected
energy.
POWER ACCESSORY PLUGS
A 10-pin male Molex connector on the power cable
assembly, mates to the power/accessory connector
(J901) on the rear of the transceiver. Extra pin
positions are used for connection of optional devices
not included with this assembly.
Optional devices can be connected to the
Power/Accessory Plug by inserting Molex pins
included with these devices into their respective
vacant holes. See
Figure 3 - 1 . Option connections
are shown in lighter shade.
EXTERNAL SPEAKER
While optional for Standard Control Heads
(70-1341/1441), an external speaker is required when
using Deluxe Control Heads (70-1344/1444).
The transceiver internal speaker is connected to
receive audio by the jumper to pins 5 and 6. To use an
external speaker, the jumper must be removed (if
present) to disable the internal speaker and the two
wires from the external speaker must connect to pins 4
and 6.
3 - 4