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Ericsson MDX LBI-39014A Maintenance Manual

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LBI-39014A
Maintenance Manual
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
LBI-38974
PA BOARD . . . . . . . . . . . . . . . . . . . . . . . LBI-39051
SERVICE SECTION . . . . . . . . . . . . . . . . . . LBI-39018
Ericsson Inc.
Private Radio Systems
Mountain View Road
Lynchburg, Virginia 24502
1-800-528-7711 (Outside USA, 804-528-7711)
Printed in U.S.A.

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Summary of Contents for Ericsson MDX LBI-39014A

  • Page 1 PA BOARD ..... . . LBI-39051 SERVICE SECTION ....LBI-39018 Ericsson Inc. Private Radio Systems...
  • Page 2 -45 dB (maximum) rors, inaccuracies of current information, or improvements to programs and/or equipment, may be made by Ericsson Inc., at any time and with- out notice. Such changes will be incorporated into new editions of this manual. No part of this manual may be reproduced or transmitted in any...

  • Page 3: Specifications

    LBI-39014A Continued Continued SPECIFICATIONS* ENVIRONMENTAL RECEIVER STANDARD METHODS PROCEDURES Frequency Range Low Split Radio 403 to 440 MHz Mil-810C Mil-810D Mil-810E Mid Split Radio 440 to 470 MHz High Temperature 501.1/Proc 2 501.2/Proc 2 501.3/Proc 2 High Split Radio 470 to 512 MHz Low Temperature 502.1/Proc 2 502.2/Proc 2...

  • Page 4: Accessories And Options

    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: Radio Operation

    (19A705499P1) can sound the vehicle horn when a call is re- NOTE: ceived. The option connects to Pin 13 of cable option Primary codes in bold are unique Ericsson codes. RECEIVER SCAN RATE PMCD7Z (19C851585P14) and is enabled through the front Squelch Tail Elimination (STE) panel switch.
  • Page 6 LBI-39014A 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: Monitor (Clr) Switch Operation In Scan

    LBI-39014A MONITOR (CLR) SWITCH OPERATION IN time is normally 2 seconds in length and PC pro- 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: Detailed Scan Operation

    LBI-39014A 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) tb=500 msec No carriers detected on P1 or P2 As an added example, consider channels 1-8 to be scanned...

  • 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-39014A 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-39014A PARTS LIST ASSEMBLY DIAGRAM MDX™ ™ UHF MOBILE RADIO ASSEMBLY 19D904183P5 Issue 2 SYMBOL PART NO. DESCRIPTION ---------------------ASSEMBLIES-------------------- 188D5062G2 RF Board (403 - 440 MHz) 188D5062G1 RF Board (440 - 470 MHz) 188D5062G3 RF Board (470 - 512 MHz) 19D901891G3 System Board 19D904025G2...
  • Page 12 ASSEMBLY DIAGRAM LBI-39014A MDX UHF Mobile Radio (19D904183, Sh. 5, Rev. 18)
  • Page 13 LBI-39014A ASSEMBLY DIAGRAM MDX UHF Mobile Radio (19D904183, Sh. 7, Rev. 18)

  • Page 14: Interconnection Diagram

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

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