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Table of contents for the manual
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Page 1
LBI-31629B INCLUDES SER VICE SECTIO N . . . . . . . . . . . . . . LBI-31 677 ericssonz Maintenance Manual M-PD SYSTEM 136-174 MHz PERSON AL TWO-W A Y FM RADIO COMBIN A TION Ericsson Inc. Pri v ate Radio Systems Mountain V iew Roa d L ync hburg, V irginia 24502 1-800- 528-7711 (Ou tside USA, 804-5 28-7711) Printed in U.S.A .[...]
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Copyright © Apr il 1987, General Electric Compan y SPECIFICA TIONS SYSTEM Frequency Ra nge FCC Id en tification Number 136 MHz to 160 MHz AXA9WNTR-145-A 150 MHz to 174 MHz AXA9WNTR-145-B Frequency Stability 5 PPM Battery Drain (at 7.5 VDC) Standby 65 Milliamperes Recei ver (Rated Audio) 195 Milliamperes T ransmitter 1.9 amperes Dimensi o ns ( H x [...]
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DESCRIPTION Ericsson GE’ s M-PD System Pe rsonal Radio is a high- quality , high-performance, two-way , FM, comm unicat ions uni t consis ting of a transmit/r eceiv e circuit with a frequency syn- thesizer cont rolled by a microprocessor . The M-PD Pe rsonal Radio is ideal for use in public services by pro vidin g the fol- lowing features: • 48[...]
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• Channel Busy Lo ck Out : Personality information in- cludes the ca pability to preve nt the transmitter from op- erating on a channel where carr ier acti vity is present. The "Channel Busy" indicator (BSY) is acti ve duri ng this time. • A utomatic/Manual Power Levels : The desired power lev el on each channel can be progr ammed int[...]
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Assemble these part s into one unit according to the fol- lowing procedure and as sho wn in Figure 1 - M-PD Op erat- ing Controls and Accessories. 1. Screw the antenna or the RF te st connector In its receptacle. A clockwise turn will insert the antenna or RF test connector , while a counter clockwise turn will remove them. 2. Slid e the battery pa[...]
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2. U se the DTMF keypad or use the Recall T elephone Number key (RCL) to enter the digits of the te le- phone nu mb er . 3. Press the secondar y key and the n press the SEND key . An optional tone (sidetone) m ay be heard as each digit is transmitted. 4. When someone answers, pres s the PTT bar and speak d irectly i nto the grille on the radio, or [...]
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Q202. The RF power output from Pin 2 of th e TX-Amp module A201 i s conne cted th rough a resist or atte nuator to Pin 1 of the P A module where it is appli e d to t he in pu t of the RF power amplifier stages. The RF power amplifie r stages amplify the input from the TX-Am p module to a typ ical power output le vel of 6 watts at Pin 5. The output [...]
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Synthesizer Circuit The Synt hesizer circu it co ntains P hase-L ock-l oop mod - ule (PLL) A 102, VCTCXO Referenc e Oscillator module A103, TX/RX V oltage Controlled Oscillator modul e (VCO) A106 and a Low Pas s Filter ampl ifie r (LPF). Refer to Fi g- ure 9 - Synthesizer . The VCO used to gene rate the recei ve and tran smit reference frequencies [...]
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CONTR OLLER CIRCUIT This co ntroller circuit consists of contr ol circuits and audio ci rcuits. Physi cally , this circuit consists of three cir- cuit boards as follo ws: • Contr ol Boar d • Signal in g Board • LCD Board Contr ol Board The Cont rol board cons ists of the following circ uits (see Figure 2): • CMOS Micr ocomput er (A1) • RA[...]
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Page 10
Charger comb inations for charging the battery packs a re av ailable with char ge times of 1 hour , 3 hours and 16 h ours. A combination can be a single unit desk or a vehicular char ger . It can also be a wall mounted multiple charger . Charge Le vel A fully charged battery pack should provide a te rminal voltage greater than 7.5V . A fully discha[...]
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Figure 11 - Disassembly Figure 12 - Disassembly Step 1 Figure 13 - Disassembly Step 2 Figure 14 - Disassembly Step 3 LBI-31629 10[...]
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Figure 15 - Disassembly Step 4 Figure 16 - Disassembly Step 5 Figure 17 - Disassembly Step 6 Figure 18 - Disassembly Step 7 LBI-31 629 11[...]
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INTRINSICALL Y SAFE USA GE Selected personal radios with appropriat e factory installed F4 Options are certi fied as Intrinsically Safe by the Fa ctory Mu tual Research Corp oration for use in Class 1 , Di vision 1 o r 2, hazardous locations in the pres ence of Groups C a nd D at- mospheres; Non-incendi ve Class 1, Di vis ion 2, h az ar do us loc a[...]
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Page 14
1. The battery is continuously overchar ged for lo ng pe ri- ods of time. 2. A regularly performed duty cycle which allo ws the battery to expend only a limited por tion of i ts capa c- ity . If the nickel-cadmium battery is only sparingly or s eldom used and is left on continuous charge for one or two months at a time, it could d evelop the "[...]
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INTERCONNECTION DIA GRAM LBI-31629 14[...]
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RADIO BO ARD A4WE0373 9/40 OUTLINE DIA G RAM COMPONENT SIDE SOLDER SI DE LBI-31 629 15[...]
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SCHEMA TIC DIA GRAM RADIO SCHEMA TIC DIA GRAM WITH TYPI CAL V OL T A GE A4WE0373 9/40 LBI-31629 16[...]
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Contr oller Board A4WE0402 3 OUTLINE DIA G RAM COMPONENT SIDE SOLDER SI DE LBI-31 629 17[...]
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SCHEMA TIC DIA GRAM Contr oller Board A4WE0402 3 LBI-31629 18[...]
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Signalli ng Board A4WE0402 4 OUTLINE DIA G RAM SCHEMA TIC DIA GRAM COMPONENT SIDE SOLDER SI DE M-PD Signaling Board A4WE0402 4 LBI-31 629 19[...]
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LCD Board A4WE0373 7 OUTLINE DIA GRAM COMPONENT SIDE SOLDER SIDE LBI-31629 20[...]
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SCHEMA TIC DIA GRAM LCD 1 Board A4WE0373 7 LBI-31 629 21[...]
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SCHEMA TIC & OUTLINE DIA GRAM Battery Packs LBI-31629 22[...]
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MECHANICAL P ARTS BREAKDO WN M-PD EXPLODED VIEW SYSTEM TYPE A1WL09 006 LBI-31 629 23[...]
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PA R T S L I S T LBI-31629 24[...]
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PA R T S L I S T LBI-31 629 25[...]
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PA R T S L I S T LBI-31629 26[...]
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PA R T S L I S T LBI-31 629 27[...]