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Ericsson LBI-39014 Maintenance Manual

Mdx uhf mobile radio
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LBI-39014
Mobile Communications
MDX™
UHF MOBILE RADIO
TABLE OF CONTENTS
RF BOARD . . . . . . . . . . . . . . . . . . . . . . . . . . . . LBI-39017
SYSTEM BOARD . . . . . . . . . . . . . . . . . . . . . . . . LBI-38842
AUDIO/LOGIC BOARD . . . . . . . . . . . . . . . . . . . . . LBI-39016
AUDIO AMPLIFIER BOARD . . . . . . . . . . . . . . . . . . LBI-38844
FRONT CAP ASSEMBLY . . . . . . . . . . . . . . . . . . . . LBI-38850
PA BOARD . . . . . . . . . . . . . . . . . . . . . . . . . . . . LBI-39051
SERVICE SECTION . . . . . . . . . . . . . . . . . . . . . . . LBI-39018
Printed in U.S.A.
Maintenance Manual

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Summary of Contents for Ericsson LBI-39014

  • Page 1 LBI-39014 Mobile Communications MDX™ UHF MOBILE RADIO TABLE OF CONTENTS RF BOARD ......LBI-39017 SYSTEM BOARD .

  • Page 2: Table Of Contents

    INTERCONNECTION DIAGRAM ......... . Audio Frequency Response Within +1, -3 dB of a 6 dB/octave pre-emphasis curve from 300-3000 Hz Continued Copyright © March 1994, Ericsson GE Mobile Communications Inc.

  • Page 3: Specifications

    LBI-39014 LBI-39014 Continued Continued SPECIFICATIONS* ENVIRONMENTAL RECEIVER STANDARD METHODS PROCEDURES Frequency Range Low Split Radio 403 to 440 MHz Mechanical Shock 516.2/Proc 1 516.3/Proc 1-6 516.4/Proc 1-6 Mid Split Radio 440 to 470 MHz Humidity 507.1 507.2 507.3 High Split Radio...

  • Page 4: Description

    Display Board for the alphanumeric LED dis- play. The synthesizer circuit generates all transmit and receive The Ericsson GE UHF 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-39014 LBI-39014 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 mode. A system refers to a set of channels and a channel is a Cable Option PMCD7Z (19D851585P14) is used to bring PRIM.
  • Page 6 LBI-39014 LBI-39014 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-39014 LBI-39014 time is normally 2 seconds in length and PC pro- MONITOR (CLR) SWITCH OPERATION IN grammable from 0.3 to 5 seconds on 0.1 seconds SCAN steps. If no other channel activity occurs during this time, scanning will then resume. The priority chan- The CLR switch does not operate while scanning inac- nels are still being sampled during the hang time.

  • Page 8: Public Address Option Operation

    LBI-39014 LBI-39014 Priority 1 Channel Programming: than or equal to four, then all non-priority channels will be Carrier on P2 detected/wrong Channel Guard CONDITION 3: P2 has Channel Guard, P1 does not scanned between each P1, P2 scan. P1-P2-P1-P1-P1-P1-P1-P1-P1-P1-P1-P2-P1... • Method 1 - Front programmable (default)

  • Page 9: Type 99 Option Operation

    787.5 Hz When a T99 call is received, the entire display will alter- 823.5 Hz Tone D is the diagonal tone used (Ericsson GE tone sys- nate between "T99" and the normal channel display and an 877.5 Hz In the Ericsson GE tone format, the first tone may be tems only) when the first and second tone frequencies are the alert tone will sound.
  • Page 10 LBI-39014 LBI-39014 In the Motorola tone format, the first tone may be one to Table 5 - Motorola Type Coder 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-39014 PARTS LIST ASSEMBLY DIAGRAM LBI-39014 MDX™ UHF MOBILE RADIO ASSEMBLY 19D904183P5 Issue 1 SYMBOL PART NO. DESCRIPTION ---------------------ASSEMBLIES-------------------- 188D5062G RF Board (403 - 440 MHz) 188D5062G RF Board (440 - 470 MHz) 188D5062G RF Board (470 - 512 MHz)
  • Page 12 LBI-39014 ASSEMBLY DIAGRAM LBI-39014 MDX UHF Mobile Radio (19D904183, Sh. 5, Rev. 0)
  • Page 13 LBI-39014 ASSEMBLY DIAGRAM LBI-39014 MDX UHF Mobile Radio (19D904183, Sh. 7, Rev. 1)

  • Page 14: Interconnection Diagram

    LBI-39014 INTERCONNECTION DIAGRAM LBI-39014 MDX UHF Mobile Radio (188D5198, Sh. 1, Rev. 0)
  • Page 15 LBI-39014 INTERCONNECTION DIAGRAM LBI-39014 MDX UHF Mobile Radio (188D5198, Sh. 3, Rev. 0)
  • Page 16 LBI-39014 INTERCONNECTION DIAGRAM LBI-39014 MDX UHF Mobile Radio (188D5198, Sh. 4, Rev. 0)

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