Ericsson DUAL FORMAT MDX LBI-38848B Maintenance Manual
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Ericsson DUAL FORMAT MDX LBI-38848B Maintenance Manual

806 - 870 mhz mobile
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LBI-38848B
Maintenance Manual
™
DUAL FORMAT MDX
806 - 870 MHz MOBILE
TABLE OF CONTENTS
RF BOARD . . . . . . . . . . . . . . . . . LBI-38849
SYSTEM BOARD . . . . . . . . . . . . . LBI-38842
AUDIO/LOGIC BOARD . . . . . . . . . . LBI-38843
AUDIO AMPLIFIER BOARD . . . . . . . LBI-38844
FRONT CAP ASSEMBLY . . . . . . . . . LBI-38850
PA BOARD . . . . . . . . . . . . . . . . . LBI-38302
SERVICE SECTION . . . . . . . . . . . . LBI-38851
DUAL FORMAT MDX™ RADIO ASSEMBLY
SYMBOL
PART NUMBER
A1
19D902123G22
A3
19D901891G2
A4
19D904025G2
A5
19D903963G1
19C851822G1
344A4253G1
344A4255G7
19A705301P6
19B801467P1
19B801467P2
19B801454P36
19A705235P3
19B801454P38
19B801454P37
19B802397P1
19D904027P1
19C337683G2
19D904185G1
19D904186G1
19D904187G1
19B801358P18
19B235310P10
*
COMPONENTS, ADDED, DELETED OR CHANGED BY PRODUCTION CHANGES
Ericsson Inc.
Private Radio Systems
Mountain View Road
Lynchburg, Virginia 24502
1-800-528-7711 (Outside USA, 804-528-7711)
PARTS LIST
ISSUE 1
DESCRIPTION
APPLICATION ASSEMBLY
19D904183
— — — — ASSEMBLIES
— — —
RF BOARD
SYSTEM BOARD
AUDIO AMPLIFIER BOARD
AUDIO/LOGIC BOARD
PA BOARD
— — — — —
KITS — — — — —
Hardware Kit (No. 1)
Hardware Kit (No. 2)
— — — — — CABLES — — — —
Cable, Antenna
Cable, J705 to J151
Cable, J5 to J105
Cable, RX to J104
Cable, Ribbon, J901 on Audio Amplifier
to J902 on System Board
Cable, Antenna to J7
Cable, TX to J101
Cable, Handset
— — — MISCELLANEOUS
— —
Casting
Bracket
Cover, Bottom
Cover, Top
Panel, Front
Cable, 9 Foot, Power
Nameplate, Combination
Printed in U.S.A.

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Summary of Contents for Ericsson DUAL FORMAT MDX LBI-38848B

  • Page 1 PA BOARD ....LBI-38302 SERVICE SECTION ... . LBI-38851 COMPONENTS, ADDED, DELETED OR CHANGED BY PRODUCTION CHANGES Ericsson Inc. Private Radio Systems Mountain View Road...

  • Page 2: Table Of Contents

    Ericsson Inc., at any 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 recording, for any purpose, without the express written permission of Ericsson Inc.

  • Page 3: Specifications

    LBI-38848 The circuit boards are all mounted on a main casting to SPECIFICATIONS* GENERAL DESCRIPTION provide easy access for servicing. Interconnect plugs are used to connect the boards to eliminate pinched wires and other GENERAL The Dual Format MDX™ Mobile Radio is a synthesized, wiring problems.

  • Page 4: Audio/Logic Board

    The STE is enabled for NOTE: PC PROGRAMMER OPTIONS transmit and/or receive by PC programming the radio’s per- Primary codes in bold are unique Ericsson codes. sonality. The radio is programmed using an IBM compatible personal computer equipped with a RS-232 port. Option...

  • Page 5: Hardware And Hardware Options

    LBI-38848 After the initiating mobile receives a channel assignment conditions that cause the radio to switch from one mode to HARDWARE AND SYSTEM DESCRIPTION from the control station, it immediately switches frequency another are shown in Figure 2. HARDWARE OPTIONS over to the assigned voice channel and sends a burst of 9600 The radio enters the Idle mode when power is turned on EDACS...

  • Page 6: Any Repairs, Alterations Or Substitution Of Recommended Parts Made By The User To This Equipment Not Approved By The Ready Mode

    LBI-38848 Figure 1 - GE-MARC Block Diagram Figure 3 - Signal Timing tone in order for the radio to enter the Ready mode. If no busy GLOSSARY OF GE-MARC TERMS Busy Tone tone is present or if the four-tone sequence isn’t valid, the mobile will jump to the next channel in the call originate set A "Voice-plus"...

  • Page 7: Radio Operation

    LBI-38848 In a two-tone call, the mobile sends the collected tone unit is an invalid user or if the unit is CARRIER (GE-MARC and Conventional operation.) Turning The Radio ON/OFF for a programmable duration. In the four-tone call, the mo- requesting an unavailable service.

  • Page 8: Assembly Diagrams

    ASSEMBLY DIAGRAM LBI-38848 (19D904183, Sh. 1, Rev. 6)
  • Page 9 ASSEMBLY DIAGRAM LBI-38848 (19D904183, Sh. 2, Rev. 6)

  • Page 10: Interconnect Diagrams

    INTERCONNECTION DIAGRAM LBI-38848 (19D904133, Sh. 1, Rev. 3)
  • Page 11 INTERCONNECTION DIAGRAM LBI-38848 (19D904133, Sh. 2, Rev. 2)
  • Page 12 INTERCONNECTION DIAGRAM LBI-38848 (19D904133, Sh. 3, Rev. 2)

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