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Ericsson GE-MARC VE MDR Maintenance Manual
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Ericsson GE-MARC VE MDR Maintenance Manual

Ericsson GE-MARC VE MDR Maintenance Manual

Mobile radio
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LBI-38696
Mobile Communications
MDR™
MOBILE RADIO
TABLE OF CONTENTS
DUPLEXER INTERFACE BOARD . . . . . . . . . . . . . . . LBI-38700
RF BOARD . . . . . . . . . . . . . . . . . . . . . . . . . . . . LBI-38697
SYSTEM BOARD . . . . . . . . . . . . . . . . . . . . . . . . . LBI-31924
LOGIC BOARD . . . . . . . . . . . . . . . . . . . . . . . . . . LBI-38392
AUDIO BOARD . . . . . . . . . . . . . . . . . . . . . . . . . . LBI-38391
FRONT CAP ASSEMBLY . . . . . . . . . . . . . . . . . . . . LBI-38699
HANDSET . . . . . . . . . . . . . . . . . . . . . . . . . . . . . LBI-38698
SERVICE SECTION . . . . . . . . . . . . . . . . . . . . . . . LBI-38701
Printed in U.S.A.
Maintenance Manual

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Summary of Contents for Ericsson GE-MARC VE MDR

  • Page 1 LBI-38696 Mobile Communications MDR™ MOBILE RADIO TABLE OF CONTENTS DUPLEXER INTERFACE BOARD ....LBI-38700 RF BOARD ......LBI-38697 SYSTEM BOARD .

  • Page 2: Table Of Contents

    Wait ........... . . Copyright© March 1992, Ericsson GE Mobile Communications Inc.
  • Page 3 LBI-38696 LBI-38696 SPECIFICATIONS TABLE OF CONTENTS (Cont’d) GENERAL 13.8 Volts ±20% Operating Voltage Page BASIC OPERATION ..........Battery Drain Receiver (13.8 Vdc) VOLUME ADJUSTMENT .

  • Page 4: Duplexer Interface/Talk-Around Board

    The RF board includes the programmable frequency synthe- The Logic Board controls the operation of the radio and The Ericsson GE-MARC VE MDR Mobile Radio is a synthe- Carrier Control Timer (CCT) sizer, transmitter exciter, receiver front end and IF circuitry.

  • Page 5: System Board

    LBI-38696 LBI-38696 further user intervention. When placing a trunked SPECIAL units in the same group. A Block Diagram is shown in Figure 1. mode indicator on the control panel. A tone signalling Timing OPTION CABLE CALL mobile to land interconnect call, the ON HOOK CALL Diagram is shown in Figure 3.

  • Page 6: Handset

    LBI-38696 LBI-38696 READY MODE When an incoming call has been detected, or an idle channel has been acquired, the mobile enters the Ready mode. In this mode, the audio and push-to-talk circuits are enabled, the speaker is unmuted, and the operator is alerted an alert tone. The radio can then be used in the conventional push-to-talk manner with the radio remaining on the channel until the operator hangs up or the repeater drops the busy tone, causing the unit to revert to Idle...
  • Page 7 LBI-38696 LBI-38696 Figure 4 - Idle Mode Figure 5 - Wait Mode...

  • Page 8: Radio Operation

    LBI-38696 LBI-38696 Acquisition Tone ALPHANUMERIC STATUS INDICATORS A 1962.9 Hz tone sent at full deviation, for 50 milliseconds, Busy from the repeater is used as acknowledgment, from the repeater, that a busy tone was sent and signals the mobile that signalling tones can now be sent.

  • Page 9: Mute

    LBI-38696 LBI-38696 Bar Status Indictor (|||||) SYSTEM BUSY (Trunked mode only) KEY DEFINITIONS/FUNCTIONS Clear (CLR) In conventional or direct mode all 5 bars are lit to indicate A low frequency tone is sounded for one second after Press CLR for less than one second to clear the last digit MISCELLANEOUS KEYS entered.

  • Page 10: Basic Operation

    LBI-38696 LBI-38696 TESTMODE Allows testmode to be entered (un- 4. The radio will sound a three tone alert signal when you can TELEPHONE EXTENDED FEATURES AREA SELECTION less disabled from pre-program- begin the conversation. ming). Extended features are accessed by first pressing the FCN key The desired AREA can be selected by pressing and releas- 5.

  • Page 11: Direct Mode Operation

    LBI-38696 LBI-38696 During an interconnect call the timeout occurs after 30 2. Before making a call, determine if the channel is busy by Locking the MDR Mobile Radio NOTE seconds of channel silence. pressing the CLR key momentarily to disable the squelch If a number already exists in the memory location entered and monitor the channel for activity.

  • Page 12: Delay After Dtmf Star (*)

    ASSEMBLY DIAGRAM PARTS LIST LBI-38696 LBI-38696 TABLE 2 - DIGITAL CHANNEL GUARD CODES DTMF Digit Length MDR MOBILE RADIO ASSEMBLY SYMBOL PART NO. DESCRIPTION ISSUE 1 The user can change the duration of the DTMF tones by REAR ASSEMBLY PRIM. EQUIV.
  • Page 13 LBI-38696 ASSEMBLY DIAGRAM LBI-38696 RADIO ASSEMBLY DIAGRAM 19D901916G22 (19D901916, Sh. 4, Rev. 0)
  • Page 14 LBI-38696 INTERCONNECTION DIAGRAM LBI-38696 800 MHz Duplex Mobile (System) (19D903561, Sh. 1, Rev. 4)
  • Page 15 LBI-38696 INTERCONNECTION DIAGRAM LBI-38696 Standard 800 MHz Duplex Mobile (19D903561, Sh. 2, Rev. 4)
  • Page 16 LBI-38696 INTERCONNECTION DIAGRAM LBI-38696 800 MHz Duplex With Talk-Around (19D903561, Sh. 3, Rev. 4)
  • Page 17 LBI-38696 INTERCONNECTION DIAGRAM LBI-38696 800 MHz Duplex Mobile (Options) (19D903561, Sh. 4, Rev. 4)
  • Page 18 LBI-38696 APPLICATION DIAGRAM LBI-38696 (19C851246, Rev. 0)