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Manual Ericsson MPI-II VHF

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  • Ericsson MPI-II VHF - page 1

    Mobile Communicatio n s SER VICE SECT ION FOR M P I -I I VH F P E RS O NA L RA D I O Printed in U.S.A. Copyright January 1991, E ricsson G E Mobile C ommunications, Inc. Main tenance Ma n ual LB I-3 8557A Ericsson GE Mobile C o mmunications I n c . Mountain View Road • Lyn chburg, Virginia 24502 ...

  • Ericsson MPI-II VHF - page 2

    INTRODUCTION This se r vice secti on c ontains the necessary information to ali gn and troublesh oot the MPI-II (1 36-174 MHz) Per- sonal Radio. This manual includes steps for disassembly and procedures for replacing surface mount components and integrated circuits. Preventive m ai ntenance checks are pro- vided as well a s battery service d ata. T ...

  • Ericsson MPI-II VHF - page 3

    FRONT COVER 1. Remov e th e bat tery a s describ ed in the previo us section. 2. Remove the tw o scr ews at (A) ( S ee F igure 2). 3. Caref ull y lift the f ron t co ve r from the r ad io . 4. Unplug t he ca ble betw een the front cover MIC B oard and the T/R B oard . 5. To gai n acces s to the micropro ces sor, remov e the thre e scre w s at (B) a ...

  • Ericsson MPI-II VHF - page 4

    Severa l tests are presented which will help isol ate a pos- sible RF o r control circuit problem. The control circuits , which are l ocated on the T / R Board, contain no adjustments and there is n o alignment required for the control circuits. See the Trou- bleshooting section for test i nformation if a problem i s sus- pected in the control circ ...

  • Ericsson MPI-II VHF - page 5

    Figure 4 - Location of Tuning Controls and Test Points LBI-38557 LBI-38557 4 ...

  • Ericsson MPI-II VHF - page 6

    2. Check power on the lower channel . A djust C124 in the direction that increases powe r output to a level half way betw ee n t he i niti al low er a nd u p pe r ch an nel levels. 3. Rechec k the upper channel po wer. If the u pper ch annel power is r educe d , r eset to th e prev ious le vel by adjust- ing C126. 4. Repeat this procedu re until th ...

  • Ericsson MPI-II VHF - page 7

    3. Check for proper operat ion of the synthesizer. Th ere should be approxim ately 0 dBm d rive level on the SYNTH output li ne for proper transmit operation. If a Syntheiszer problem is suspected, followin g the suggestions in Troubleshooting S ynthesizer s ection. 4. If curren t consump tion ap pears normal, a nd th e sy n- thes izer o utput lev ...

  • Ericsson MPI-II VHF - page 8

    D.C. Analysis Battery voltage (7.5/10 V olts, B+) is supplied to a 5.4 volt regula t or circuit consisting of transistors Q801, Q802 and Q803. Diode re gulator U801 provides a 2.5 volt reference for this circuit. Battery voltage (B+) is also supplied to the Syn- thesizer Board for isolation a mplifie r U206. the 5.4 volt regu- lator s upplies both ...

  • Ericsson MPI-II VHF - page 9

    SURFACE MOUNT COMPONENT REPLACEMENT 1. "Tin " one te rmina l en d o f the ne w compon ent an d the corresponding pad of the P WB. Use as little solder as possible. 2. Plac e th e com ponen t on th e PWB p ads, o bservin g prope r ori enta tio n for capa cito rs, diod es, transistors, etc. 3. Simult aneo us ly tou ch the "tinned" ...

  • Ericsson MPI-II VHF - page 10

    2. A full ch arge c ycle using an appropria te Eric s so n GE charge r. 3. This p roce dure should be r epeated a gain. P erfor ming the rated discharge and charge cycle a t least twice should sufficiently rest or e the battery . MODIFICATION INSTRUCTIONS (Alternate IF Option) T o install the Alternate IF Option, follow the instructions shown below ...

Manufacturer Ericsson Category Radio

Documents that we receive from a manufacturer of a Ericsson MPI-II VHF can be divided into several groups. They are, among others:
- Ericsson technical drawings
- MPI-II VHF manuals
- Ericsson product data sheets
- information booklets
- or energy labels Ericsson MPI-II VHF
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 MPI-II VHF.

A group of documents referred to as user manuals is also divided into more specific types, such as: Installation manuals Ericsson MPI-II VHF, service manual, brief instructions and user manuals Ericsson MPI-II VHF. 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 MPI-II VHF.

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A complete manual for the device Ericsson MPI-II VHF, 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 MPI-II VHF by users. Manuals are usually written by a technical writer, but in a language understandable to all users of Ericsson MPI-II VHF.

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 MPI-II VHF - 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 MPI-II VHF, 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 MPI-II VHF, that we can find in the current document
3. Tips how to use the basic functions of the device Ericsson MPI-II VHF - which should help us in our first steps of using Ericsson MPI-II VHF
4. Troubleshooting - systematic sequence of activities that will help us diagnose and subsequently solve the most important problems with Ericsson MPI-II VHF
5. FAQ - Frequently Asked Questions
6. Contact detailsInformation about where to look for contact to the manufacturer/service of Ericsson MPI-II VHF in a specific country, if it was not possible to solve the problem on our own.

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