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

806 - 870 mhz mobile radio
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LBI-38848D
Maintenance Manual
DUAL FORMAT MDX
806 - 870 MHz
MOBILE RADIO
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
LBI-38974
PA BOARD . . . . . . . . . . . . . . . . . LBI-38302
SERVICE SECTION . . . . . . . . . . . . LBI-38851
DUAL FORMAT MDX
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
RADIO ASSEMBLY
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-38848D

  • Page 1 PA BOARD ....LBI-38302 SERVICE SECTION ... . LBI-38851 Ericsson Inc. Private Radio Systems...

  • 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-38848D SPECIFICATIONS* GENERAL Regulatory Approval FCC (United States) AXATR-311-A2 DOC (Canada) TR-311 Operating Voltage 13.8 Volts 20% Battery Drain Receiver (13.8 Vdc) 0.01 Amperes (maximum) Squelched 0.75 Amperes (maximum) Unsquelched 2.0 Amperes (maximum at 10 Watts audio, External Speaker) Transmitter (13.8 Vdc) 11 Amperes (maximum at 25 Watts RF) Channel Spacing 25 kHz (12.5 kHz NPSPAC)

  • Page 4: Audio/Logic Board

    037 560 370 554 231 504 636 745 NOTE: Primary codes in bold are unique Ericsson codes. AUDIO/LOGIC BOARD The Audio/Logic Board provides all audio and digital processing of the receive and transmit audio for digital processing by the Logic Board. The board also contains...

  • Page 5: Hardware And Hardware Options

    LBI-38848D HARDWARE AND SYSTEM DESCRIPTION HARDWARE OPTIONS EDACS The location and placement of system hardware options The Dual Format MDX mobile radio operates in either are shown on Sheet 4 of the 800 MHz Dual Format MDX EDACS (digital) mode, or in GE-MARC (tone) mode, pro- Mobile Interconnect Diagrams.

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

    Figure 1 - GE-MARC Block Diagram tone in order for the radio to enter the Ready mode. If no busy 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 and check for busy tone as described above.

  • Page 7: Radio Operation

    LBI-38848D In a two-tone call, the mobile sends the collected tone Turning The Radio ON/OFF for a programmable duration. In the four-tone call, the mo- bile always sends a 90-millisecond collect tone which the The radio is turned ON/OFF by pressing the PWR repeater regenerates and sends for the correct duration.

  • Page 8: Assembly Diagrams

    ASSEMBLY DIAGRAM LBI-38848D (19D904183, Sh. 1, Rev. 17)
  • Page 9 ASSEMBLY DIAGRAM LBI-38848D (19D904183, Sh. 2, Rev. 17) (19D904183, Sh. 5, Rev. 17)

  • Page 10: Interconnect Diagrams

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

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