Ericsson EDACS M-PA 806-870 MHz Maintenance Manual

Mobile Communications

LBI-38460C

EDACS M-PA



806-870 MHz
PORTABLE RADIO

TABLE OF CONTENTS

REAR COVER ASSEMBLY . . . . . . . . . . LBI-38466

FRONT COVER ASSEMBLY (LATER)

LESS CONTROL BOARD . . . . . . . . . . . LBI-38834

CONTROL BOARD . . . . . . . . . . . . . . LBI-38828

SERVICE SECTION . . . . . . . . . . . . . . LBI-38468

Maintenance Manual

LBI-38460

TABLE OF CONTENTS

SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

TRUNKED FEATURES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

CONVENTIONAL FEATURES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

GENERAL FEATURES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

REAR COVER ASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

FRONT COVER ASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

ANTENNAS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

BATTERY PACKS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

UNIVERSAL DEVICE CONNECTOR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

PROGRAMMING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

OPERATOR MANUAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

OPERATING TIPS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Page

INTRINSICALLY SAFE USAGE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

BATTERY PACKS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

ACCESSORIES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

PREVENTIVE MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

ILLUSTRATIONS

Figure 1 - System Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Figure 2 - Scan Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Figure 3 - Select Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Figure 4 - Side View (All Models) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Figure 5 - Options And Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Figure 6 - UDC Pin-Out . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Figure 7 - Front Panel Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Figure 8 - Rear Cover Assembly Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Figure 9 - Front Cover Assembly (Earlier) And C ont ro l B oa rd B lock Diagram . . . . . . . . . . . . . . . . 14

Table 1 - UDC Pin Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

NOTE

The software contained in this device is copyrighted by Ericsson GE Mobile Communications, Inc. Unpublished rights
are reserved under the copyright laws of the United States.

This manual is published by Ericsson GE Mobile Communications Inc., without any warranty. Improvements and

changes to this manual necessitated by typographical errors, inaccuracies of current information, or improvements to
programs and/or equipment, may be made by Ericsson GE Mobile Communications Inc. , at an y time and without notice.
Such changes will be incorporated into new editions of this manual. No part of this manual may be reproduced or
transmitted in any form or by any means, electronic or mechanical, including photocopying and r ecor ding, for any purpose,
without the express written permission of Ericsson GE Mobile Communications, Inc.

Copyright© October 1990, Ericsson GE Mobile Communications Inc.

2

SPECIFICATIONS*

GENERAL

Frequency Range 806-870 MHz

FCC Type Acceptance Numb er AXATR-188-A2

DOC Number TR-188-D2

Frequency Stability 1.5 ppm

Channel Spacing 25 kHz (12.5 kHz NPSPA C channels)

Operating Temperature Range -30°C to +60°C

Maximum Relative Humidity 90% at 55°C

Battery Voltage 7.5 Vdc (nominal)

Dimensions (H x W x D)

less battery, knobs and antenna 140 x 69 x 38 mm (5.52 x 2.72 x 1.50")
with Extra High Cap. Battery 232 x 69 x 40 mm (9.15 x 2.72 x 1.58")

Weight

less battery 585 grams (20.6 ounces)
with Extra High Cap. Battery 952 grams (33.6 ounces)

TRANSMITTER

Frequency Ra nge 806 - 825 MHz

851 - 870 MHz (repeater ta lkaround)

High/Low RF Power Output 3 Watts / 1 W att ( progra mmable on a per system

or channel basis)

Maximum Frequency Separation 19 MHz (no degradation)

FM Deviation ±5 kHz

FM Hum and Noise -40dB (companion receiver)

Spurious and Harmonic Emissions -51 dBc

Audio Response +1 to -3dB (6 dB/octave pre-em ph asis from

300 Hz to 3 kHz)

Audio Distortion less than 3% (at 1000 Hz tone, 3 kHz deviation)

LBI-38460

RECEIVER

Frequency Range 851 - 870 MHz

Sensitivity (12 dB SINAD) -116 dBm (0.35 µV)

Maximum Frequency Separation 19 MHz (no degradation)

Selectivity -67dB at 25 kHz (-20 dB at 12.5 kHz NPSPAC channels)

Critical Squelch 6 dB SINAD

Intermodulation -67dB

Spurious and Image Rejection -72dB

Audio Output 500 mW (24-ohm load impedance)

Audio Response +2 to -8dB (6 dB/octave de-emphasis from 300 Hz to 3 kHz)

Audio Distortion less than 5% (at 500 mW)

* These specifications are intended primarily for the use of the serviceman. See the appropriate Specifications Sheet for the

complete specifications.

3

LBI-38460

INTRODUCTION

The EDACS M-PA radio is a high quality microproces-

sor-contro lled synt hesized portable two- way FM radio. Th e
unit complements the EDACS trunked system by providing
a small, rugged, easy to operate and easy to program port­able radio for the 800 MHz trunking en vironment. Th e ra dio
also provides conventional communications in the 800 MHz
spectrum. M-PA operation is highlighted by its program­ming versatility. This allows tailored operation of the port­able radio to meet the needs of the radio system and the
individual users.

The EDACS M-PA radio meets or exceeds all of the

APCO 16 portable radio equipment requirements for digi­tally trunked and conventional communications. NPSAPC
capability is also built-in since the radio will operate in the 6
MHz band of narrow channels in the 800 MHz spectrum.

Three (3) different M-PA radio models are available:

Select, Scan and System.

The M-PA Select model radio is the basic version that

can be programmed with up to sixteen (16) independent
trunked grou ps and/or conventional channels. This unit fea­tures an eight-digit alphanumeric liquid crystal display
(LCD) and a 16-position knob for group/channel selection.
The display is backlit for nighttime and low-level ambient
light operation.

Scan and System model radios have an LCD similar to

the Select model radio. A keypad i s added to these radios (4­button on Scan model, 16-button on System model) to pro­vide additional features not available on the Select model
radio. These radios can be programmed with up to fifty (50)
systems with sixteen (16) groups in each, or sixteen (16)
systems with fifty (50) groups in each. In addition, up to
forty-eight (48) conventional channels and ninety-nine (99)
special calls can be programmed. Special calls include indi­vidual and telephone interconnect calls. A System model ra­dio also allows storage of ten (10) operator-entered
telephone numbers and ten (10) radio ID numbers. These
numbers can be recalled at w ill and initiated. Manually di­alled telephone interconnect calls and conventional mode
DTMF dialing is also provided by the System model’s 16­button keypad. Both the Scan and System model radios pro­vide scan capability.

TRUNKED FEATURES

Programmable Multiple System Capability

•

radio can operate on different trunked sites or on
different systems on the same site. Scan and System
model radios can be programmed with a maximum of

- The

fifty (50) systems with a maximum of sixteen (16)
groups in each system. A Select model radio can be
programmed with a maximum of sixt een (16) systems
with one group in each.

Programmable Multiple Group Capability

•

radio can communicate with many groups within a
system. Scan and System model radios can be
programmed with a maximum of fifty ( 50 ) groups per
system. If the Control Knob is programmed for group
selection, up to sixteen (16) groups can be selected
and system selection (50 maximum) is accomplished
with the STEP button on the keypad. If the Control
Knob is programmed for system selection, up to
sixteen (16) systems can be selected and then up to
fifty (50) groups can be selected via the STEP button.
In a Select model radio, a maximum of sixteen (16)
groups (from one or more systems) can be
programmed and selected with the Control Knob.

Programmable Group Call Capability

•

can simultaneously call all units within a group.

Special Call Mode

•

can initiate special calls. These calls include
individual and telephone interconnect calls. Up to
ninety-nine (99) special calls can be programmed into
the radio. Special calls cannot be programmed into a
Select model radio; therefore, these radios cannot
initiate special calls.

Remote Dynamic Regrouping Capability

•

dispatch center can regroup radios for multiagency
communications.

Remote Disable

•

remotely disabl e d by th e S yst em Manager.

Wide Area System Scan Capability

•

for multi-site applications, allows the radio to
automat ically roam from one sys tem to ano ther wh en
the current control channel is lost or on a priority scan
timer basis. In the event of a loss of the current
system’s control channel, the radio can be
programmed to automatically scan for control
channels of up to six other systems. If a new control
channel is found, the radio will switch to the new
system and sound an alert tone. Group selection may
change upon switching to the new system. The radio
can also be programmed for priority wide ar ea system
scan. A priority system can be assigned to each
system programmed into the radio. Radios
programmed in this manner will scan for the priority
trunked system’ s control chan ne l onc e every one, two,
three or four minutes (programmable). This priority
scan timer is reset each time the PTT button is
pressed.

- Scan and System model radios

- If lost or stolen, the radio can be

- The radio

- The

- This feature,

- The

4

LBI-38460

CONVENTIONAL FEATURES

• 48-Channel Capability - Scan and System model

radios can be programmed with up to forty-eight
conventional channels.

• Programmable Multi-Tone Channel Guard

(CTCSS) - Channel Guard tone frequencies within

the range of 67 H z to 210.7 Hz, including all of the
standard E1A frequencies, can be programmed for
encoded/de co ded operation.

• Programmable Multi-Code Digital Channel

Guard - Similar capability as with tone Channel

Guard is provided.

• Two-Tone Sequential (T99) Decode - Selective

calling decode is enabled or disabled on each
individual channel. Two (2) sets of unique decodes
are programmable to allow large systems individual
and group call capability. Sets are selectable on a
system basis.

• Channel Busy Lockout - Personality information

includes transmit disable capability on a channel
where carrier activity is present. This feature is
selectable on an overall radio basis.

• Repeater Ta lkaro und - Allows communication with

another portable or mobile radio when out of range of
the repeater.

GENERAL FEATURES

• Rotary Control Knob - The 16-position

top-mounted Control Knob allows easy selection of
systems, groups or conventional channels according
to how the radio is programmed. A stop-plate may be
installed under the knob to limit the maximum
number of position to less than sixteen (16). It is
normally factory installed for fifteen (15) positions.

• Volume Control Knob - This rotatable control

provides quick and easy adjustments to the volume
level. Minimum volume levels can be programmed
into the unit. This feature prevents missed calls due to
a low volume setting.

• Backlit Liquid Crystal Display - The 8-digit

alphanumeric LCD provides programmable
customi zat io n and fe ed back to t he op er ato r of variou s
operating conditions. Status flags located above and
below the digits alert the operator to various radio
conditions such as no control channel, conventional
mode enabled, transmitter in operation and a low
battery condition. Scan and System model r ad ios ha ve
additional status flags for scan and special call

operation. LCD backlighting can be enabled or
disabled on a per group or channel basis.

• Keypad - A Scan model radio has a 4-button keypad

on its front panel that provides special call and scan
control. A System model radio has a 16-button
keypad. The top four buttons on a System model
keypad are identical to the Scan model keypad,
providing special call and scan control. The lower
twelve (12) buttons form a numeric keypad that
allows enhanced special call control, manual dialing
of telephone inter-connect calls an d control of various
other features of the System model radio. Select
model radios do not have a keypad.

• Scan Operation - Scan and System model ra dios ca n

scan the trunked groups and conventional channels
programmed into the radio. Groups which have been
previously added to the scan list (via the keypad) can
be scanned. In conventional mode, the radio can be
configured for a keypad entered scan list, a fixed
(programmed) scan list, a fixed priority-one scan
channel, or the selected channel as the priority-one
scan channel. Dual-priority scan is supported in
conventional mode. The Select model radio does not
support scan operation.

• Telephone Interconne ct - When operating in trunked

mode, the special call mode (Scan and System models
only) allows operator selection and transmission of
telephone calls (numbers) programmed into the radio.
Telephone inter-connect is performed by the site. The
numeric keypad on a System model radio permits
manual dialing of telephone numbers. Conventional
mode DTMF operation is also supported by this
numeric keypad on the front panel. A Select model
radio cannot initiate telephone interconnect calls.

• Programmable via the Universal Device Connector

(UDC) - The entire operation of the radio can be field

customized by programming the unit using an IBM
PC or compatible computer. The programmed
personality is stored in non-volatile memory within
the radio.

• Simple Remote Control Capability - External

accessories can be connected to the UDC such as a
headset, a speaker-mic or a lanyard. Connection of
the speaker-mic allows the operator to remotely
control PTT operation and audio level of the external
speaker. An antenna jack is located on the UDC for
the connection of a remote mounted antenna such as
when the radio is used in a vehicular charger or
repeater.

• Emergency Signalling Feature - Pressing a single

recessed button instantly sends an alert message on a
preprogrammed channel. The radio ID number is

5

LBI-38460

transmitted and the unit is given top priority in the
system. Emergency signalling can also be enabled by
a lanyard connected to the UDC. The radio supports
GE-STAR emergency signalling for conventional
mode operations.

• Programmable Carrier Control Timer - A

programmable transmit timer will automatically
disable the transmitter and provide an alerting tone
after time-out. This feature prevents radio damage and
unnecessary channel traffic in the event of a "stuck"
mic. The CCT is reset on every PTT.

• Programmab le Transmit Power Le v el - Transmitter

power level is PC programmable into the radio (high
or low) on a per channel basis.

• Automatic Squelch - Squelch operation in trunked

mode is automatically controlled. In conventional
mode, squ elch thresho ld can be programm ed on a per
channel basis. Squelch circuits are designed so that
annoying squelch pops, which may occur at the end
of a received message, are minimized.

• Alert Tones - Alert tones prompt the operator of

various radio conditions such as channel access, CCT
time-out or a low battery.

• Power-Up Self-Test - At power-up the radio

automatically performs a diagnostic test on itself and
reports any found errors via the LCD.

The antenna screws on to the top of the unit. A side an­tenna connection is also provided at the UDC for an e xte rna l
antenna or for test purposes. This UDC antenna connection
is also utilized for external antenna operation when the radio
is locked in the vehicular charger or repeater.

REAR CO VER ASSEMBLY

The Rear Cover Assembly houses the RF Board in the
die-cast aluminum case. The complete assembly consists of
the 800 MHz RF Board, aluminum case, top antenna jack,
side (UDC) antenna ja ck and various hardware.

The RF Board’s circuitry includes the transmitter, re­ceiver and the frequency synthesizer. This FM circuitry is
under complete control of the microprocessor circuits. Con­trolling data sent to this assembly from the Control Board
includes serial synthesizer data loading, band switch data,
transmitter/receiver enabling and a transmitter power level
signal. The RF Board outputs the demodulated audio/data
and a synthesizer lock status line to the Control Board. Dur­ing transmitter operation, the RF power appears at the top
antenna jack (or the UDC jack if the appropriate adapter
plug is inserted). The Rear Cover Assembly maintenance
manual contains a detailed circuit analysis, mechanical, out­line and schematic diagrams for this assembly.

FRONT COVER ASSEMBLY

DESCRIPTION

Two major assemblies form an M -PA radio. The Front
Cover Assembly contains all of the microprocessor circuitry,
audio circuitry and the operating controls. The Rear Cover
Assembly houses the RF circuitry which includes the trans­mitter, receiver and the frequency synthesizer. The assem­blies are electrically interconnected by two single-in-line
type connectors. When mated together, the assemblies form
a weather resistant die-cast aluminum case that protects the
radio’s circuitry from harsh outside environments.

Power is provided by a battery pack that slides and
locks on to the bottom of the radio. The radio’s on/off
switch is located on the battery pack. Battery packs are
available in several different sizes and capacities.

The Front Cover Assembly houses all of the operating
controls and the digital control circuitry for the radio. Board
assemblies used in this assembly include the Control and
LCD Boards and flex circuits include the Keyp ad, UDC and
Speaker Flex circuits. The speaker, microphone and Battery
Plate are also a part of this assembly. The complete assem­bly is housed in the die-cast aluminum front cover . Scan and
System model radios are equipped with a keypad on the
front panel.

The Control Board located in the Front Cover Assembly
is the largest and most complex board in the Front Cover
Assembly. It contain s all m icr ocom puter an d audio circuitr y
which controls the radio. See the maintenance manuals spe­cific to the Control Board or the Front Cover Assembly for
service information on the related assembly.

6

LBI-38460

Figure 1 - System Model

Figure 2 - Scan Model

Figure 3 - Select Model Figure 4- Side View (All Models)

7

LBI-38460

Radio, Antennas, Batteries

Carrying Accessories

Chargers

Figure 5 - Options And Accessories

8

LBI-38460

ANTENNAS

There are two (2) antennas available for the 800 MHz
M-PA radios. Antenna styles include standard whip
(19A149061P1, Option PANC1K) and elevated feed
(19B235043P1, Option PANC1H) antennas. Both antennas
mount into the antenna jack on the top of the radio. An ex­ternal antenna can be mounted to the unit via the UDC.
When an antenna is connected to the UDC, the antenna on
the top of the radio is disabled.

BATTERY PACKS

The battery pack connects to the bottom of the unit and
delivers a nominal 7.5 Volts dc to the radio. A recessed
on/off switch for the radio is located on the battery pack. An
internal fuse located i n the radio’s Battery Pack protects the
radio and battery from excessive current draw. The battery
packs are available in several different capacities and sizes.

Radio contacts located on the top of the pack include
switched power , ground, the speaker enabling con tac ts a nd a
continuous power contact. In addition, four contacts are lo­cated on the rear of the battery pack. These four contacts
provide connections to the slip-in type chargers or vehicular
chargers/repeaters while the battery pack is still connected
to the unit. The battery charging contacts are diode pro­tected from external shorts.

The chargers utilize an internal thermistor in the battery
pack to sense temperature and automatically control charge
rate of the battery. This allows for a maximum charge rate
without overheating the battery pack. All battery packs can
be charged in less than 1-1/2 hours with the rapid type
chargers. Nominal full charge time in a standard charger is
14 hours. The Service Section contains a detailed outline
and schematic diagram of a typical battery pack. Further
service information for the battery packs is also presented in
the Service Section.

when the battery pack’s voltage drops below approximately

6.8 Volts. The low battery alert tone wil l also be heard when
the battery pack n ee d s charging.

RECHARGEABLE BATTERY PACK
DISPOSAL

The product that you have purchased contains
a rechargeable battery. The battery is recycla­ble. At the end of its useful life, under various
state and local laws, it may be illegal to dis­pose of this battery into the municipal waste

stream. Check with your local solid waste of­ficials for details in your area for recycli ng option s o r pr oper
disposal. Call T oll Free 1-800-822-9362 for information a nd
/or procedures for returning rechargeable batteries in your
state.

UNIVERSAL DEVICE CONNECTOR

The UDC is located on the side of radio just above the
PTT and Monitor Buttons. Various equipment such as the
audio accessories can be connected to the radio via the
UDC. The programming equipment is also connected to it
when the personality is programmed into the radio. The
UDC furnishes an excellent first-check-point for initial
bench checks without the need to disassemble the radio. Ta­ble 1 lists all pins and their appropriate function. When the
radio is turned on it senses the resistance value between
UDC pins 9 and 1 and switches the appropriate circuits to
provide proper radio-to-accessory operation.

Chargers are availab le with no min al ch arge times of one
hour (rapid) and fourteen hours (standard). Combinations
include single (1 ) and multi (5 or 6) position, standard and
rapid charge units. In addition, the vehicular chargers/re­peaters simultaneously charge the battery while the radio is
operating.

The battery packs should be fully charged in an appro­priate charger before they are placed into service. This ap­plies to new battery packs received from the factory and to
battery packs that have been stored for long periods of time.
A fully charged battery pack should have an open-terminal
voltage greater than 7.5 Volts (typically 9.0 Vdc). A battery
pack in need of a charge will cause the low battery "BAT"
status flag on the radio to turn on. This flag will turn on

Figure 6 - UDC Pin-Out

9

LBI-38460

Table 1 - UDC Pin Functions

PIN NAME INPUT OR

OUTPUT

1 GROUND ----- Case Ground
3 UDC RX AUDIO Output T est Point For Speaker Audio
4 SW BATT Output Switched Accessor y Power
5 EXT PTT Input External Microphone PTT Input
6 TX DATA Input For Programming
7 RX DATA Output For Programming
8SPARE
9 UDC VOLT ----- Option/Accessory Sense Pin
10 T/R Output Low = Transmit, High = Receive
11 UDC MUTE Output Low = Audio Mute d
12 EXT MIC HI Input External Microphone Audio Input
13 EXT EMER Input Lanyard Connection
34 UDC DISCR Output T e st Point For RX Audio

PROGRAMMING

The radio’s personality is programmed using an IBM
PC or compatible computer. A full-screen portable PC can
be used for field programming. The Programming Manual
and Software is TQ-3364. This package includes both 5-1/4
floppy and 3-1/2 inch disks. The programming software
uses a series of screens and windows to guide you through a
programming session. See TQ-3364 for further program­ming details. PC Programming Adapter TQ-3370 and Pro­gramming Cable TQ-3311 will also be required. These
items provide interface and connection between the PC and
the radio when the personality is transferred from the PC
into the radio.

OPERATOR MANUAL

the unit. Mountains and buildings can also reduce the range
of the unit.

In areas where transmission or reception is poor, some
improvement may be obtained by insuring that the antenna
is vertical. Moving a few yards in another direction or mov­ing to a higher elevation may also improve communication.
Vehicular op eration can be aided with the use of an exter­nally mounted antenna.

Battery condition is another critical factor in the trouble
free operation of a portable radio. Observe the procedures
listed in the Service Section to insure the battery packs do
not develop the "Memory Effect".

Always observe all of the Federal Communication
Commission’s rules and regulations during any service or
operating proced ure.

USE

Complete operating details for the EDACS M-PA radios
are included in LBI-38407. This operator’s manual contains
detailed trunked mode and conventional mode operating
procedures for the Select, Scan and System model radios.

OPERATING TIPS

Antenna location and condition is critical when using an
800 MHz radio. Operating the radio in low areas of terrain,
under power lines or bridges, inside of a vehicle or in a met­al or steel framed building can severely reduce the range of

10

INTRINSICALLY USAGE

Selected portable radios with appropriate factory in­stalled F4 Optio ns are certified as Intrinsically Safe by the
Factory Mutual Research Corporation. Intrinsically Safe ap­proval includes Class I, II, III, Division 1 hazardous loca­tions in the presence of Groups C, D, E, F and G
atmospheres. Non-Incendive approval includes Class I, Di­vision 2 hazardous locations in the presence of Groups A, B,
C and D atmospheres.

LBI-38460

Hazardous locations are defined in the National Electri­cal Code. Useful standards NFPA 437A and NFPA 437M
for the classifications of hazardous areas can be ordered
from the National Fire Protection Ass ociation, Bat terym arch
Park, Quincy; MA 02269.

BATTERY PACKS

Only battery packs identified with a green latch shall be
used with a portable radio that is rated and labeled as Fac­tory Mutual Intrinsically Safe. Use of nonspecified battery
packs voids Factory Mutual approval. The following battery
pack options are approved for use in intrinsically safe ra­dios:

PAPA1F Rechargeable Battery Pack, Extra
(19A704860P6) High Capacity (Tall Case)

PAPA1G Rechargeable Battery Pack, High
(19A704850P6) Capacity (Short Case)

ACCESSORIES

The accessor ies that follow are approved for use with
intri nsi ca lly s afe rad io s. Us e of access ories othe r than tho se
listed voids Factory Mutual approval.

PAAB1A Headset/Microphone
(19B801508P3)

PAAC1A Earpiece Kit
(19B801508P2)

PAAC1B GE-STAR Lanyard
(19B801 508P8)

PAAE1A Speaker/Microphone
(19B801508P1)

PAAE1B Speaker/Microphone with
(19B801508P4) GE-STAR Lanyard

PAAE1C Speaker/Microphone/Antenna
(19B801508P6)

PANC1H Antenna, 806 - 870 MHz,
(19B235043P1) Elevated Feed

PANC1K Antenna, 806 - 870 MHz, Flex
(19A149061P1)

PAHC1C Belt Clip
PAHC1D Swivel Mount with Belt Loop

PAHC1E Case, Leather, with Belt Loop

(Short Case)

PAHC1F Case, Leather, with Belt Loop

(Tall Case)

PAHCIG Case, Leather, with Swivel Mount

and Belt Loop (Short Case)

PAHC1H Case, Leather, with Swivel Mount

and Belt Loop (Tall Case)

PAHC1K Shoulder Strap, L eather, with

Mounting Plate

PAHC5R Holster, Plastic.

MAINTENANCE

The EDACS M-PA radio is a very reliable unit and will
normally provide many years of trouble-free service. The
recommended Preventive Maintenance procedures that fol­low should be performed when a technician comes in con­tact with a unit. Component level trouble-shooting
information is contained in the manual associated with the
particular assembly and in the Service Section.

PREVENTIVE MAINTENANCE

Antenna

The antenna and antenna contact should be kept clean
and free from dirt or corrosion. If the antenna contact should
become dirty or corroded, communication range could be
reduced.

Battery Packs

Insure the battery packs are properly maintained. Do
not over or unde r charge them on a regular basis. Verify the
contacts are clean and free of corrosion.

Mechanical

Since portable radio units are subject to shock and vi­bration, check for loose plugs, knobs, s c rews, etc.

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LBI-38460

Transmitter Check

Check transmit frequency and devi ati on. Normally t h es e
checks are made when the unit is first put into operation.
They should be repeated after the first month of operation,
then annually .

Receiver Check

Receiver sensitivity should be checked periodically as an
indication of overall receive r operation.

Cleaning

If the unit requires an external cleaning use mild soap
and a damp cloth. Avoid abrasive cleaners or chemicals
which may damage the plastic or rubber surfaces on the
unit.

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Figure 7 - Front Panel Parts

Printed in U . S.A.

BLOCK DIAGRAM

LBI-38460

Figure 8 - Rear Cover Assembly Block Diagram

13

LBI-38460

BLOCK DIAGRAM

Figure 9 - Fron t C o ver Assembly (Ear l ie r ) And Control Board Bloc k Di ag ram

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