Ericsson LBI-38653 Maintenance Manual Download Page 1

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LBI-38653

Maintenance Manual

TABLE OF CONTENTS

MAIN BOARD ASSEMBLY ........................................... LBI-38760

FRONT PANEL ASSEMBLY .......................................... LBI-38757

POWER AMPLIFIER ASSEMBLY................................. LBI-38761

SERVICE SECTION ........................................................ LBI-38759

MDS

440-512 MHz MOBILE RADIO

COMBINATION

Mobile Communications

Printed in U.S.A.

Summary of Contents for LBI-38653

Page 1: ...nual TABLE OF CONTENTS MAIN BOARD ASSEMBLY LBI 38760 FRONT PANEL ASSEMBLY LBI 38757 POWER AMPLIFIER ASSEMBLY LBI 38761 SERVICE SECTION LBI 38759 MDS 440 512 MHz MOBILE RADIO COMBINATION Mobile Communi...

Page 2: ...NERAL Frequency Range Transmit 440 470 MHz UHF MID SPLIT 470 512 MHz UHF HI SPLIT Receive Same as Transmit Channel Spacing 25 kHz Frequency Stability 5 0 ppm Operating Temperature Range 30 to 60 C Bat...

Page 3: ...logic circuitry includes the 80C535 microproc essor with associated EPROM and Electrically Erasable PROM EEPROM memory and latch circuitry The Microprocessor controls the functions of the transmitter...

Page 4: ...n relief is provided to secure and protect the microphone connector A microphone Hook Switch with mag netic sensing is provided with the radio to be mounted externally on the dashboard of the vehicle...

Page 5: ...annel Guard is programmed and disabled Table 1 Channel Guard Tone Frequencies Standard Tone Frequencies In Hertz 67 0 82 5 97 4 114 8 136 5 162 2 192 8 71 9 85 4 100 0 118 8 141 3 167 9 203 5 74 4 88...

Page 6: ...ne Frequency The second tone frequency is 802 5 Hz For different paging numbers locate the first digit in the 100 s Digit column and determine the tone frequencies as described in the example Table 3...

Page 7: ...No Tone Group 1 Tone Group 2 Tone Group 3 Tone Group 4 Tone Group 5 Tone Group 6 1 2 3 4 5 6 7 8 9 0 349 0 Hz 368 5 Hz 389 0 Hz 410 8 Hz 433 7 Hz 457 9 Hz 483 5 Hz 510 5 Hz 539 0 Hz 330 5 Hz 600 9 Hz...

Page 8: ...Figure 1 MDS Conventional Radio Block Diagram LBI 38653 LBI 38653 7...

Page 9: ...MECHANICAL PARTS BREAKDOWN LBI 38653 LBI 38653 8...

Page 10: ...This page intentionally left blank LBI 38653 LBI 38653 9...