Motorola Micom 2 Manual

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Figure 6 shows the location of the installed components within the
vehicle.
Figure 6: Trunk MICOM-2E Installation Within Vehicle
The MICOM-2E trunk model requires the connection of two cables
across the length of the vehicle because the radio transceiver is located
in the trunk. If the battery is located in the rear section of the vehicle, the
power cable extends to the battery location.
NOTE
The upper installation (number 1 in  Figure 6), is
recommended over the front installation (number 2 in
Figure 6) because of the covering that protects the
control head from direct sunlight. 
						

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Installation Procedures
Follow these procedures to install the radio in the desired location. If the
accessory mounting tray is not used, ignore the steps pertaining to it.
Mobile Mounting Kit
Step 1. Mount the accessory mounting tray in the desired location. Use
the tray as a template if holes must be drilled.
Figure 7:  Accessory Mounting Tray
Step 2. 
Use the four supplied screws to fasten the mounting tray
bracket to the bottom of the radio housing.
Step 3. Drill an additional hole for the ground bolt.
DC Power Connection
This paragraph describes connections to a 12-V negative-ground
vehicular battery.
Figure 8:  DC Power Connection 
						

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Step 1. Bring the power connector on the DC Power Cable to the radio
DC connector but do not attach it to the radio. Then bring the
three heavy wires (RED, GRN, BLK) to a 12-V battery, passing
them through access holes as required.
NOTE
The wires must be as short as possible. They should
be cut down to a minimum as required.
Step 2. Thread the ends of the red and green wires from the power
connector through the two fuse holder caps. Cut apart the two
fuse clips and solder or crimp them to the wires.
Step 3. Install the 30-A fuse in the fuse holder on the red wire, and the
7.5 A fuse in the fuse holder on the green wire. Then assemble
the fuse holders.
Step 4. Crimp or solder the supplied lugs to the red, green, and black
wires.
Step 5. Connect the lugs on the red and green cables together to the
positive terminal of the battery. Then connect the lug on the
black wire to the negative terminal of the battery.
NOTE
1.  It is recommended to attach the black (ground)
wire to the vehicle’s chassis. The point of
attachment should be located as close as
possible to the radio. Refer to Figure 9.
2.  In front installation, add one ferrite (supplied with
the installation radio kit) on the DC cable as
close as possible to the radio.
3.  In trunk mount installation, add one ferrite
(supplied with the installation radio kit) on the
DC cable as close as possible to the radio and
one farrite on the control cable between the
control head and the radio. 
						

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Figure 9:  Wire Attachment to Chassis 
						

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Microphone Clip
The microphone cable enables placing the microphone clip in any
convenient location up to five feet from the radio. To install the clip, use
it as a template to drill two holes to receive self-threading sheet-metal
screws. Mount the clip using the supplied screws.
Figure 10:  Microphone Clip
Final Connections
Step 1. Ensure that the radio is off. Then connect the power cable to
DC connector J4 and connect the antenna RF cable to antenna
connector J2.
If an antenna tuner is used, connect the antenna to the tuner,
connect the tuner RF cable to connector J3, located on the
radio rear panel.
Step 2. If the mounting tray is used, slide the radio into the tray and
fasten the tray bracket with the supplied screw. 
						

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77
 
 Figure 11:  Fitting Radio onto Mounting Tray
Step 3. 
Use the tie straps included with Cable Kit to tie loose cables out
of the way.
Step 4. Connect a ground lead from the GND screw on the radio rear
panel to the mobile chassis.
IMPORTANT
Special attention should be given to locating a good
vehicle ground. Optimum radio performance can only
be achieved with a ground connection having a very
low resistance. The vehicle frame makes the best
ground, but body structural reinforcement members
are also suitable for grounding purposes. The ground
lead should be as short as possible.
Step 5. If desired, plug an external speaker into the accessory
connector. Any speaker with an impedance greater than 8 ohms
can be used.
External Speaker Installation
Connect the external 8 Ohms, 5 Watts speaker to the accessory
connector (pin 1,3). The external speaker is connected in parallel to the
internal speaker.
If disconnection of the internal speaker is required, perform the following
steps: 
						

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Step 1. Insert a small, flat-blade screwdriver in the slotted area on the
right hand-side panel of the radio and press the screwdriver
towards you, to release the Control Head.
Figure 12:  Opening the Control Head
Step 2. 
Disconnect the internal speaker from the board.
Step 3. Return the top cover to its original position by applying pressure
on both sides of the cover. Observe that the seal is correctly
located.
Operational Checks
When installation is complete, carefully check all operating functions
(refer to the Operation section). In case of malfunctioning, refer to
Troubleshooting and Tuning the Antenna paragraphs in this manual. 
						

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Connectors
Microphone Connector J1
The microphone connector is located on the lower part of the radio front
panel. Table 1 lists the functions of the microphone connector pins.
Table 1. Connector J1, Pin Connections
Pin
No.Pin Name Description
1 SWA+ Line used to power up the microphone2 RXD Serial communication line3 TXD Serial communication line4 GND Ground line5 MIC AUDIO Input audio signals generated by the microphone
(600 Ohms impedance, 100 mV 1 KHz tone is required
for full output power).
6 PTT MIC Activates transmission by short to ground.7 MONITOR Line which mutes the speaker before transmission is
enabled (short momentary to ground to open speaker).
8 AUDIO OUT Receive audio 600 Ohms (300 mVRMS)
Antenna Connector J2
The “N type” antenna connector is located on the rear panel of the
transceiver. In transmit mode, it is used to feed the antenna with the
transmit power; and in receive mode it is used to deliver the received
signal from the antenna to the radio.
Accessory Connector J3
The accessory connector J3 is located on the radio rear panel. It is
intended for use with external accessories such as: modem, linear
amplifier, phone patch, etc.
The user can use the 25-pin D-type plug to make his own required
connections or he can use the Interface cable FKN4403 (same as S809
option) when Morse key and headphones are needed to be connected
by their standard connectors. Also, the user can utilize FLN2271 if he
needs to connect up to four devices. Table 2 lists Connector J3, Pin
Connections. 
						

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Table 2. Connector J3, Pin Connections
Pin
No.Pin Name Description
1 SPKR- Differential output to the external 8W, 8W speaker.2 SPARE3 SPKR+ Differential output to the external 8W, 8W speaker.4 RX AUDIO+ Differential output received audio signals (0 dBm;
600W; not controlled by volume).
5
RX AUDIO-*Differential output received audio signals (0 dBm;
600W; not controlled by volume).
6 TX AUDIO+ Differential input received audio signals (600W
input impedance, 0 dBm is required for full power).
7
TX AUDIO-*Differential input received audio signals (600W
input impedance, 0 dBm is required for full power).
8 PTT_IN VOICE Transmission command (by short to ground) for
voice signals.
9 PTT_IN DATA Transmission command (by short to ground) for
data signals.
10 PTT_IN CW Transmission command (by short to ground) for
CW (Morse) signals.
11 SWA+ 13.8V (nominal) current limited.12 KW_C_C KW option channel change13 KW_ON/OFF KW option power ON/OFF.14 AGC FAST/SLOW AGC fast or slow release.15 RXD Point to point communication line to HOST/HLC.16 TXD Point to point communication line to HOST/HLC.17 RESET External RESET.18 GND Ground19 KW PTT KW PTT20 EXT_ALARM External Alarm Operation (open collector -pulled to
ground when external alarm is activated.
21 VPP Flash programming voltage22 KW_ALC KW_ALC23 SQ_GATE Squelch Indication24 FAN ON/OFF FAN ON/OFF25 KW TUNE KW tune
                                                       
* Do not connect to GND. 
						

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DC Connector J4
The DC connector J4 is mounted on the rear panel of the radio. It is
used to feed the radio with the required power from AC power supply or
from the battery. The following table lists the function of the DC
connector lines.
Table 3. Connector J4, Pin Connections
Pin
No.Pin Name Description
1 TX POWER Used to deliver high currents to the radio up to 28 Amp,
mainly for the transmitter circuitry
2 Ground Used as return line for receive and transmit lines3 RX Power Used to deliver relatively low currents to the radio up to
3 Amp, mainly for the receiver circuitry