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Ericsson GE LBI-31932E Maintenance Manual

Mvs synthesized mobile radio 403-512 mhz, 25 watt mobile combination
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Mobile Communications
MVS™
SYNTHESIZED MOBILE RADIO
403-512 MHz, 25 WATT MOBILE
COMBINATION
TABLE OF CONTENTS
RF BOARD . . . . . . . . . . . . . . . . . . . . . . . . . LBI-38258
PA BOARD . . . . . . . . . . . . . . . . . . . . . . . . . LBI-31934
AUDIO BOARD . . . . . . . . . . . . . . . . . . . . . . LBI-31922
LOGIC BOARD . . . . . . . . . . . . . . . . . . . . . . LBI-38899
SYSTEM BOARD . . . . . . . . . . . . . . . . . . . . . LBI-31924
FRONT CAP ASSEMBLY . . . . . . . . . . . . . . . . . LBI-38387
SERVICE SECTION . . . . . . . . . . . . . . . . . . . . LBI-38292
Maintenance Manual
LBI-31932E
Printed in U.S.A.

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Summary of Contents for Ericsson GE LBI-31932E

  • Page 1 LBI-31932E Mobile Communications MVS™ SYNTHESIZED MOBILE RADIO 403-512 MHz, 25 WATT MOBILE COMBINATION TABLE OF CONTENTS RF BOARD ......LBI-38258 PA BOARD .

  • Page 2: Table Of Contents

    LBI-31932 SPECIFICATIONS TABLE OF CONTENTS SYSTEM Page RADIO TYPE SPECIFICATIONS ........... . Frequency Range: System .

  • Page 3: Transmitter

    LBI-31932 TRANSMITTER Power Output 25 Watts Conducted Spurious 60 dB Below Carrier (typical) ±5.0 kHz (maximum) Modulation Audio Sensitivity 40 millivolts (typical) Audio Frequency Within +1 to -3dB of 6 dB/octave pre-emphasis from 300 Characteristics (Per RS-I52B) Hz to 3000 Hz per EIA standards. Post limiter filter per FCC and EIA.

  • Page 4: General Description

    LBI-31932 The MVS radio consists of the following assemblies: GENERAL DESCRIPTION PA BOARD EQUIPMENT AND FEATURES • RF Board The PA Board amplifies the RF Board PA module output The MVS mobile radio is a synthesized, wideband radio, MICROPHONE • PA Board to the rated output of 25 Watts.

  • Page 5: Available Options

    The external speaker options provide a five inch speaker in a LEXAN housing. Option LS0I (19C850550G10) provides a *Codes Unique to Ericsson GE between the PC and the unit. (An auxiliary power supply for the unit is also included which is not needed to program the dash mount and Option LS02 (19C850550G11) provides a MVS.) Option TQ3315 provides the MVS programming cable...

  • Page 6: Operation

    LBI-31932 Service Cable 19A704875P1 provides an extension be- VOLUME VOLUME INDICATOR EXTERNAL ALARM FOR T-99 tween the Audio Board and the Logic Board. Both sides of the Audio Board are available for servicing using the cable. Momentary type switches to adjust the volume. Press and Functions as a bar graph to indicate relative volume level.

  • Page 7: Scan Operation

    LBI-31932 CHANNEL PRIORITY 1 (P1) and another for Priority 2 (P2) with any or all remaining chan- 2. If SCAN indicator is lit, press and release the SCAN switch nels programmed as non-priorities. to disable scan function. Two push type switches. Press CHANNEL (up arrow) to in- Illuminates when the channel displayed is a Priority 1 scan 3.

  • Page 8: Using Radio With Scan

    LBI-31932 DELETE SCAN CHANNEL (S,P1,P2) SCN Indicator channel is changed to a channel not in the scan list, the new 3. Scan For Channel Guard: channel will be temporarily added to the scan list until the 1. Confirm that the radio is on. If not, press the power switch. When the SCAN button is pushed, the radio will light the SELECTED channel is changed again.

  • Page 9: Detailed Scan Operation

    LBI-31932 least once every 0.12 to 1.28 seconds. If Channel Guard is pro- DETAILED SCAN OPERATION grammed for a channel but no carrier is detected, the scan time for that channel is 15 milliseconds. The scan operation is controlled by the Logic Board, and provides for scanning any or all of up to 16 channels.

  • Page 10: Public Address Option Operation

    LBI-31932 f. Carrier on P2 and right Channel Guard b. Carrier on P2 detected/wrong Channel Guard PUBLIC ADDRESS OPTION If the Horn Alert option is present with the Type 99 option, P1-P2-P1-P1-P1-P1-P1-P1-P1-P1-P1-P2-P1-... the radio can beep the vehicle horn when a Type 99 call is Display P2, scan P1 tb=500 milliseconds received.
  • Page 11 LBI-31932 NOTE In the EGE tone format, the first tone may be from tone EXAMPLE 2 - Code 265: Table 2 - TONE GROUPS group A (for Individual or Group calls) or from tone group C Tone frequencies above 1000 Hz must be rounded off to (for Super Group calls).

  • Page 12: Parts List

    MECHANICAL PARTS BREAKDOWN LBI-31932 Table 5 - Motorola Tone Frequencies And Groups Tone Tone Tone Tone Tone Tone Tone Group 1 Group 2 Group 3 Group 4 Group 5 Group 6 349.0 Hz 600.9 Hz 288.5 Hz 339.6 Hz 584.8 Hz 1153.4 Hz 368.5 Hz 634.5 Hz...

  • Page 13: Interconnection Diagram

    LBI-31932 INTERCONNECTION DIAGRAM (19D901983, Sh. 1, Rev. 7)
  • Page 14 INTERCONNECTION DIAGRAM LBI-31932 (19D901983, Sh. 2, Rev. 3)
  • Page 15 LBI-31932 INTERCONNECTION DIAGRAM (19D901983, Sh. 3, Rev. 3)
  • Page 16 INTERCONNECTION DIAGRAM LBI-31932 (19D901983, Sh. 4, Rev. 2)

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