Ericsson MDX GE-MARC Maintenance Manual
  1. Manuals
  2. Brands
  3. Ericsson Manuals
  4. Radio
  5. MDX GE-MARC
  6. Maintenance manual

Ericsson MDX GE-MARC Maintenance Manual

806 - 866 mhz mobile radio
Hide thumbs Also See for MDX GE-MARC:
Table of Contents

Advertisement

Quick Links

Download this manual
LBI-38960
Mobile Communications
MDX
GE-MARC
TM
806 - 866 MHz MOBILE RADIO
TABLE OF CONTENTS
RF BOARD . . . . . . . . . . . . . . . . . . . . . . . . . . . . LBI-38849
SYSTEM BOARD . . . . . . . . . . . . . . . . . . . . . . . . LBI-38842
AUDIO BOARD . . . . . . . . . . . . . . . . . . . . . . . . . LBI-38391
LOGIC BOARD . . . . . . . . . . . . . . . . . . . . . . . . . . LBI-38392
AUDIO AMPLIFIER BOARD . . . . . . . . . . . . . . . . . . LBI-38844
FRONT CAP ASSEMBLY . . . . . . . . . . . . . . . . . . . . LBI-38850
PA BOARD . . . . . . . . . . . . . . . . . . . . . . . . . . . . LBI-38302
SERVICE SECTION . . . . . . . . . . . . . . . . . . . . . . . LBI-38973
Printed in U.S.A.
Maintenance Manual

Advertisement

Table of Contents
loading

Related Manuals for Ericsson MDX GE-MARC

Summary of Contents for Ericsson MDX GE-MARC

  • Page 1 LBI-38960 Mobile Communications GE-MARC 806 - 866 MHz MOBILE RADIO TABLE OF CONTENTS RF BOARD ......LBI-38849 SYSTEM BOARD .
  • Page 2 AREA UP/DOWN (±) ..........7 Copyright © September 1993, Ericsson GE Mobile Communications Inc.

  • Page 3: Specifications

    Receiver Circuit Frequency Range 806.0125 - 820.9875 MHz and 851.0125 - 865.9875 MHz The MDX GE-MARC radio assembly consists of the fol- Output Power 25 Watts (Intermittent duty cycle; EIA 20%) The dual conversion receiver circuit consists of a front end...

  • Page 4: Accessories And Options

    The Display Board contains a mi- STE is used with tone and digital Channel Guard to elimi- the MDX GE-MARC radio for operation as a base station. If desired, after disabling the alarm, press the CLEAR croprocessor that senses key closures, updates the eight charac- nate squelch tails.

  • Page 5: System Description

    LBI-38960 LBI-38960 Table 1 - Tone & Digital Channel Guard SYSTEM DESCRIPTION The MDX GE-MARC trunked mobile radio system pro- TONE CG DIGITAL CG DIGITAL CG DIGITAL CG vides fast access to available RF channels and a degree of pri- vacy due to selective signaling.

  • Page 6: Glossary Of System Terms

    LBI-38960 LBI-38960 one with no busy tone. If no channel is free, the radio activates switch on the microphone, or comes "off-hook". If successful the Call Retry state if programmed for this option. This causes the unit becomes Ready. Otherwise, the unit is Idle or the radio to revert to the Idle mode and scan for a call while Idle/Wait after all channels are tried.
  • Page 7 LBI-38960 LBI-38960 Figure 4 - Wait Mode Figure 5 - Ready Mode...

  • Page 8: Control Panel Operation

    MENU (MNU) for normal conversation. An LED display provides the operational status of the ra- The MDX GE-MARC trunked radio is equipped with the dio. The display contains transmit (TX) and busy (BSY) in- controls listed below (see Figure 6).

  • Page 9: Radio Operation

    NOTE munication between the two impossible. If the call retry option has been preprogrammed in Figure 6 - MDX GE-MARC Front Panel the radio, the radio automatically tries to acquire a channel every five seconds for up to fifteen times...

  • Page 10: Maintenance

    LBI-38960 LBI-38960 channel was not available as described under section CONVENTIONAL MODE OPERATION TRANSMITTER ADJUSTMENT REMOVING IC’s PLACING A DISPATCH CALL (TRUNKED MODE OPERATION). Press the AREA UP/DOWN (±) keys to select the Adjustment for the transmitter includes measuring the Removing IC’s (and most other soldered-in components) conventional mode area.
  • Page 11 PARTS LIST LBI-38960 Place the "tinned" soldering iron on the other end Replacing Chip Components MDX GE-MARC RADIO of the component and the pad simultaneously. Ap- ply solder to the top end of the component until the 19D902123G22 RF Board Assembly Using as little solder as possible, "tin"...
  • Page 12 LBI-38960 ASSEMBLY DIAGRAM LBI-38960 GE-MARC RADIO (19D904183, Sheet 5, Rev. 3) (19D904183, Sheet 6, Rev. 4)
  • Page 13 LBI-38960 ASSEMBLY DIAGRAM LBI-38960 GE-MARC RADIO (19D904183, Sheet 1, Rev. 1)
  • Page 14 LBI-38960 ASSEMBLY DIAGRAM LBI-38960 GE-MARC RADIO (19D904183, Sheet 2, Rev. 2)
  • Page 15 LBI-38960 INTERCONNECT DIAGRAM LBI-38960 GE-MARC RADIO (19D904832, Sheet 1, Rev. 0)
  • Page 16 LBI-38960 INTERCONNECT DIAGRAM LBI-38960 GE-MARC RADIO (19D904832, Sheet 2, Rev. 0)
  • Page 17 LBI-38960 INTERCONNECT DIAGRAM LBI-38960 GE-MARC RADIO (19D904832, Sheet 3, Rev. 0)
  • Page 18 LBI-38960 LBI-38960 This page intentionally left blank...

Table of Contents