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Manual Ericsson LBI-38505A

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Summary
  • Ericsson LBI-38505A - page 1

    LBI-38505A (Supercedes LBI-30025) T ABLE OF CONTENTS RF ASSEMBL Y , MIXER AND REFI L TE R BOARD . . . . . . . . . . . . . LBI-30 032 (DF110 7) OSCILLA TOR/MUL TIPLIE R BOARD . . . . . . . . . . . . . . . . . . . . LB I-30 029 (DF110 6) IF A UDIO AND SQUELCH BOARD . . . . . . . . . . . . . . . . . . . . LB I-38 507 Maintenance Manual MASTR ® II BA ...

  • Ericsson LBI-38505A - page 2

    Copyright © May 1990, Eri csson GE M obile C ommunications Inc. T ABLE OF CONTENTS Page SPECIFICA TIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...

  • Ericsson LBI-38505A - page 3

    DESCRIPTION MASTR II Base Station, 406 to 512 mega hertz receivers are single co n version, superhe terodyn e FM recei vers design ed for one-th rough eight-freq uency op eration. T he solid state recei ver utilizes integrate d circuits (ICs), m onolithic crystal filter s a nd discrete c omponents with ea ch of the crystal f ilters located between ...

  • Ericsson LBI-38505A - page 4

    T o remove the IF Filter board from the radi o: 1. Remove the eight screws (E) holding the IF Filter bottom cov er . 2. Remove the six scre ws (F) holding the IF Filter top cover . 3. R e move the th ree screws (G) and the C onnector (H ), and care fully pus h do wn on the top of t he boar d to a void dama gi n g t he f ee dthrough ca pa cito rs . ...

  • Ericsson LBI-38505A - page 5

    FR ONT END ALIGNMENT EQUIPMENT REQUIRED 1. T est Set Mode ls 4EX3A11, 4EX8K12, or 20,000 ohms-per-V olt multimete r with a 1 V olt scale. 2. A 406-512 MHz signa l source. PRELIMIN AR Y CHECKS AND ADJUSTMENT S 1. Connect blac k plug from T est Set to Rece iver Centralized Met ering Jack J601, and red plug to system board met ering jack J905. Set met ...

  • Ericsson LBI-38505A - page 6

    406-512 MHz MASTR II RECEIVER ICOM FREQ UENCY ADJUSTMENT First, check the frequency to determine if any adjustment is required. The frequency meas urement requires equipment with an absolute accurac y which is 5 to 10 times better than the tolerance to be maintained. When performing frequency m easurement, the entire r adio sho uld be as near as po ...

  • Ericsson LBI-38505A - page 7

    ALIGNMENT PR OCEDURES COMPLETE RECEIVER ALIGNMENT EQUIPMENT REQUIRED 1. T est Set Model s 4EX3A11, 4EX8K12, or 20,000 ohms-per V olt multi meter with a 1- V olt scal e. 2. An 11.2 MHz signal s ource (T est Set Model 4EX9A10). Al so a 406-512 MHz signal source with a one-inc h piece of insulated wire no la rger than .065 inch dia meter connecte d to ...

  • Ericsson LBI-38505A - page 8

    TEST PR OCEDURES These T est Proc edures are desi gned to h elp yo u to ser vice a recei ver that is operating---but not proper ly . The problems e n- countered could be low po wer , poor sensiti vity , distortion, limiter not operating properly , and low gain. By following the sequence of tes t ste ps sta rting with S tep 1, th e de fect can be q ...

  • Ericsson LBI-38505A - page 9

    TR OUBLESHOO TING PR OCEDURES TEST PR OCEDURES TEST PR OCEDURES STEP 2 USABLE SENSITIVITY (12 dB SIN AD) If STEP 1 checks out properly , measure the rece i ver sensiti vity as follows: A. Apply a 1 000 microvolt, on frequency signal mod ulated by 10 00 Hz with 3. 0 kHz deviation to A 301-J1. B. W ith Function Switch o n Distortion Analyzer set to V ...

  • Ericsson LBI-38505A - page 10

    TR O UBLESHOO TING PROC EDURES SQUELCHED UNSQUEL CHED NOISE SQ OUTPUT U605-2 0.2 VDC 9 .9V CAS U605-1 0.1 VD C 9.9V RX MUTE U605-14 0.2 VDC 9 .9V R U S U605-13 0. 2 VDC 4.9 V SQ DISABLE SW . INPUT U606-1 0.2 VD C 9.9V A UDIO GA T E SW . CONTR OL U606-11 0.2 VDC 9 .9V If Externa l Decoder is used (CG, DCG, T ype 99, etc .), RX Mute will remain low ( ...

  • Ericsson LBI-38505A - page 11

    TR O UBLESHOO TING PROC EDURES 406-512 MHz MASTR II RECEIVER LBI-38505 LBI-38505 10 ...

  • Ericsson LBI-38505A - page 12

    406-512 MHz MASTR II RECEIVER TR OUBLESHOO TING PR OCEDURES LBI-38505 LBI-38505 11 ...

Manufacturer Ericsson Category Radio

Documents that we receive from a manufacturer of a Ericsson LBI-38505A can be divided into several groups. They are, among others:
- Ericsson technical drawings
- LBI-38505A manuals
- Ericsson product data sheets
- information booklets
- or energy labels Ericsson LBI-38505A
All of them are important, but the most important information from the point of view of use of the device are in the user manual Ericsson LBI-38505A.

A group of documents referred to as user manuals is also divided into more specific types, such as: Installation manuals Ericsson LBI-38505A, service manual, brief instructions and user manuals Ericsson LBI-38505A. Depending on your needs, you should look for the document you need. In our website you can view the most popular manual of the product Ericsson LBI-38505A.

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A complete manual for the device Ericsson LBI-38505A, how should it look like?
A manual, also referred to as a user manual, or simply "instructions" is a technical document designed to assist in the use Ericsson LBI-38505A by users. Manuals are usually written by a technical writer, but in a language understandable to all users of Ericsson LBI-38505A.

A complete Ericsson manual, should contain several basic components. Some of them are less important, such as: cover / title page or copyright page. However, the remaining part should provide us with information that is important from the point of view of the user.

1. Preface and tips on how to use the manual Ericsson LBI-38505A - At the beginning of each manual we should find clues about how to use the guidelines. It should include information about the location of the Contents of the Ericsson LBI-38505A, FAQ or common problems, i.e. places that are most often searched by users in each manual
2. Contents - index of all tips concerning the Ericsson LBI-38505A, that we can find in the current document
3. Tips how to use the basic functions of the device Ericsson LBI-38505A - which should help us in our first steps of using Ericsson LBI-38505A
4. Troubleshooting - systematic sequence of activities that will help us diagnose and subsequently solve the most important problems with Ericsson LBI-38505A
5. FAQ - Frequently Asked Questions
6. Contact detailsInformation about where to look for contact to the manufacturer/service of Ericsson LBI-38505A in a specific country, if it was not possible to solve the problem on our own.

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