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Ericsson MDX LBI-39015 Maintenance Manual

Vhf mobile radio
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LBI-39015
Mobile Communications
MDX™
VHF MOBILE RADIO
TABLE OF CONTENTS
RF BOARD . . . . . . . . . . . . . . . . . . . . . . . . . . . . LBI-39019
SYSTEM BOARD . . . . . . . . . . . . . . . . . . . . . . . . LBI-38842
AUDIO/LOGIC BOARD . . . . . . . . . . . . . . . . . . . . . LBI-39016
AUDIO AMPLIFIER BOARD . . . . . . . . . . . . . . . . . . LBI-38844
FRONT CAP ASSEMBLY . . . . . . . . . . . . . . . . . . . . LBI-38850
PA BOARD . . . . . . . . . . . . . . . . . . . . . . . . . . . . LBI-31921
SERVICE SECTION . . . . . . . . . . . . . . . . . . . . . . . LBI-39020
Printed in U.S.A.
Maintenance Manual

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Summary of Contents for Ericsson MDX LBI-39015

  • Page 1 LBI-39015 Mobile Communications MDX™ VHF MOBILE RADIO TABLE OF CONTENTS RF BOARD ......LBI-39019 SYSTEM BOARD .

  • Page 2: Table Of Contents

    INTERCONNECTION DIAGRAM ......... . 300-3000 Hz Continued Copyright © March 1994, Ericsson GE Mobile Communications Inc.

  • Page 3: Specifications

    LBI-39015 LBI-39015 Continued Continued SPECIFICATIONS* STANDARD METHODS PROCEDURES RECEIVER Mechanical Shock 516.2/Proc 1 516.3/Proc 1-6 516.4/Proc 1-6 Frequency Range Humidity 507.1 507.2 507.3 Low Split Radio 136.0 to 153.0 MHz High Split Radio 150.0 to 174.0 MHz Salt Fog 509.1/Proc 1 509.2/Proc 1 509.3/Proc 1 ±...

  • Page 4: Description

    Display Board for the alphanumeric LED dis- play. The synthesizer circuit generates all transmit and receive The Ericsson GE VHF MDX™ Mobile Radio is a synthe- Carrier Control Timer (CCT) RF frequencies. The synthesizer frequency is controlled by the sized, wide band radio that uses integrated circuits and micro- microprocessor located on the Audio/Logic Board.

  • Page 5: Squelch Tail Elimination (Ste)

    LBI-39015 LBI-39015 In the conventional mode of operation, the user selects a Table 2 - Digital Channel Guard Codes CABLE OPTION PMCD7ZE channel and communicates on that channel in the conventional Cable Option PMCD7Z (19D851585P14) is used to bring mode. A system refers to a set of channels and a channel is a all option connections from the system Board through the back PRIM.
  • Page 6 LBI-39015 LBI-39015 Scan operation will be determined by the following condi- Press the programmed flex key, mapped to scan DELETE SCAN CHANNEL (S, P1, P2) DISPLAY tions: add/delete, to add the channel to the scan list. The S indicator will be shown in the display to indicate that Confirm that the radio is on.
  • Page 7 LBI-39015 LBI-39015 grammable from 0.3 to 5 seconds on 0.1 seconds MONITOR (CLR) SWITCH OPERATION IN steps. If no other channel activity occurs during this SCAN time, scanning will then resume. The priority chan- nels are still being sampled during the hang time. The CLR switch does not operate while scanning inac- tive channels.

  • Page 8: Public Address Option Operation

    LBI-39015 LBI-39015 Priority 1 Channel Programming: scan sequence. If the number of non-priority channels is less Carrier on P2 detected/wrong Channel Guard CONDITION 3: P2 has Channel Guard, P1 does not than or equal to four, then all non-priority channels will be P1-P2-P1-P1-P1-P1-P1-P1-P1-P1-P1-P2-P1...

  • Page 9: Type 99 Option Operation

    During that time subsequent pressing of the flex key or Group/SEL buttons will toggle the T99 state between 652.5 Hz Tone D is the diagonal tone used (Ericsson GE tone sys- OFF and ON. 607.5 Hz In the Ericsson GE tone format, the first tone may be tems only) when the first and second tone frequencies are the 787.5 Hz...
  • Page 10 LBI-39015 LBI-39015 In the Motorola tone format, the first tone may be one to Table 5 - Motorola Type Code Numbers Table 6 - Motorola Tone Frequencies and Groups three tones: A for individual call, B for Quick-Call and C for Group Call.

  • Page 11: Parts List

    LBI-39015 PARTS LIST ASSEMBLY DIAGRAM LBI-39015 MDX™ VHF MOBILE RADIO ASSEMBLY 19D904183P5 ( Issue 1 SYMBOL PART NO. DESCRIPTION APPLICATION ASSEMBLY 19D904183 -------------------------ASSEMBLIES----------------------- 19D904958G1 RF Board (136-153 MHz) 19D904958G2 RF Board (150-174 MHz) 19D901891G3 System Board 19D904025G2 Audio Amplifier Board 19D903963G2 Audio/Logic Board 19C851540G1...
  • Page 12 LBI-39015 ASSEMBLY DIAGRAM LBI-39015 MDX VHF Mobile Radio (19D904183, Sh. 5, Rev. 4)
  • Page 13 LBI-39015 ASSEMBLY DIAGRAM LBI-39015 MDX VHF Mobile Radio (19D904183, Sh. 7, Rev. 1)

  • Page 14: Interconnection Diagram

    LBI-39015 INTERCONNECTION DIAGRAM LBI-39015 MDX VHF Mobile Radio (188D5198, Sh. 1, Rev. 0)
  • Page 15 LBI-39015 INTERCONNECTION DIAGRAM LBI-39015 MDX VHF Mobile Radio (188D5198, Sh. 3, Rev. 0)
  • Page 16 LBI-39015 INTERCONNECTION DIAGRAM LBI-39015 MDX VHF Mobile Radio (188D5198, Sh. 4, Rev. 0)

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Mdx lbi-39019

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