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1、ericssonz LBI-38865A Maintenance Manual Monogram Series UHF MOBILE RADIO MODEL MGM 450 This manual is published by Ericsson Inc., without any warranty. Improvements and changes to this manual necessitated by typographical errors, inaccuracies of current information, or improvements to programs and/o

2、r equipment, may be made by Ericsson Inc., at any time and without notice. Such changes will be incorporated into new editions of this manual. No part of this manual may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopying and recording, for any

3、purpose, without the express written permission of Ericsson Inc. Copyright November 1994, Ericsson, Inc. NOTICE! The software contained in this device is copyrighted by Ericsson Inc. Unpublished rights are reserved under the copyright laws of the United States. NOTE Repairs to this equipment should

4、be made only by an authorized service technician or facility designated by the supplier. Any repairs, alterations or substitution of recommended parts made by the user to this equipment not approved by the manufacturer could void the users authority to operate the equipment in addition to the manufa

5、cturers warranty. NOTICE! This manual covers Ericsson and General Electric products manufactured and sold by Ericsson Inc. LBI-38865 ii TABLE OF CONTENTS SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

6、 . . . . . . . 1-3 GENERAL. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 RECEIVER (PER EIA RS-204-C) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

7、. . . . . . . 2 TRANSMITTER (PER EIA RS-152-C). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 OPTIONS AND ACCESSORIES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

8、4 UNPACKING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 GENERAL DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

9、. . . . . . . . . . . 6 DESCRIPTION OF CONTROLS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-8 OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

10、 . . . . . . . . . . . . . . . . . . . . 9-10 CIRCUIT ANALYSIS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11-13 RECEIVER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

11、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 TRANSMITTER. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 PREVENTIVE MAINTENANCE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

12、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15-16 TOP AND BOTTOM COVERS. . . . . . . . . . . . . . . . . . . . . . . .

13、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 FRONT PANEL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 RF BOARD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

14、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 DIGITAL BOARD. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 PROGRAMMING INSTRUCTION . . . . . . . . . . . . . . . . . . . . . . . . .

15、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 TEST EQUIPMENT SETUP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 ALIGNMENT PROCEDURE. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

16、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19-22 SUGGESTED TEST EQUIPMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 PROGRAMMING FOR ALIGNMENT. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

17、. . . . . . . . . . . . . . . . . . . 19 PLL ALIGNMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 TRANSMITTER ALIGNMENT. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

18、 . . . . . . . . . . . . 20 RECEIVER ALIGNMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 RF BOARD ALIGNMENT AND TEST POINTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

19、 24 DIGITAL BOARD ALIGNMENT AND TEST POINTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 PERFORMANCE TEST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26-27 TRANSMITTE

20、R PERFORMANCE TEST. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 RECEIVER PERFORMANCE TESTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 COMPONENT REPLACEMENT . . . . . . . . . . . . . .

21、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29-30 MONOGRAM SERIES LBI-38865 TABLE OF CONTENTS Page -iii- Nov. 94 ELECTRICAL PARTS LIST. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

22、 . . . . . . 31 PRINTED CIRCUIT BOARDS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 TOP VIEW 406136-F ISSUE: H / RF BOARD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32.1 BO

23、TTOM VIEW 406136-F ISSUE: H / RF BOARD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32.2 TOP VIEW 406137-E ISSUE: H / DIGITAL BOARD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32.3 BOTTOM VIEW 406137-E ISSUE: H / DIGITAL BOARD. . .

24、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32.4 MISC. PRINTED CIRCUIT BOARDS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32.5 MISC. PRINTED CIRCUIT BOARDS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

25、 . . . . . . . . . . . . . . . . . . 32.6 EXPLODED VIEW AND PARTS LIST. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 SCHEMATICS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

26、 . . . . . . . . . . . . . . . . . . . . . . . 34 MONOGRAM SERIES LBI-38865 TABLE OF CONTENTS Page -iv- Nov. 94 SPECIFICATIONS GENERAL Frequency Range A Band 400-440 MHz C Band450-470 MHz E Band470-512 MHz Channels16 maximum Channel Spacing25 kHz Programmable (In 6.25 kHz Steps) Input Voltage13.8 VD

27、C Negative Ground Current Drain Standby0.15 Amp Receive0.5 Amp Transmit8 Amp Temperature Range-30 to + 60 C Dimensions2 x 6 x 8.25 inches (51 x 152 x 210 mm) Weight4 lbs., 3 oz. (1.9kg) With Mic. FCC Compliance Parts 15, 22, 74, 90, 95 FCC ID Designation 400-440 MHzF3JSM445A 450-470 MHzF3JSM445C 470

28、-512 MHzF3JSM445E DOC (Canada) Type Approval 400-440 MHzN /A 450-470 MHz287194100I 470-512 MHzN / A MONOGRAM SERIES LBI-38865 SPECIFICATIONS Page-1- Nov. 94 RECEIVER (PER EIA RS-204-C) RF Input Impedance50 Ohms Nominal Sensitivity: (EIA 12 dB SINAD)0.35 uV 20 dB Quieting0.50 uV Squelch Sensitivity0.

29、20 uV Threshold Selectivity-80 dB Intermodulation -70 dB Modulation Acceptance Bandwidth 7.5 kHz Spurious and Image-70 dB Audio Power Output5 W (10% Dist. into 40 W Load) Frequency Stability 0.0005% Operational Bandwidth10 mHz ( 3dB degradation at band limits) Frequency SpreadBand WidthFactory Progr

30、ammed Freq. Spreads 400-440 MHz10 MHz405-415 MHz (3 dB Degradation at limits) 450-470 MHz10 MHz460-470 MHz (3 dB Degradation at limits) 470-512 MHz10 Mhz500-510 MHz (3 dB Degradation at limits) UHF PROGRAMMING CHART RECEIVE MONOGRAM SERIES LBI-38865 SPECIFICATIONS Page-2- Nov. 94 TRANSMITTER (PER EI

31、A RS-152-C) RF Power Output40 Watts (adjustable) RF Output Impedance50 Ohms Spurious and Harmonics-70 dBc Modulation16KOF3E FM Hum and Noise-45 dB Nominal Audio Distortion 3 % 1000Hz Frequency Stability0.0005% Operational Bandwidth20 mHz ( 3dB degradation at band limits) Frequency SpreadBand WidthFa

32、ctory Programmed Freq. Spreads 400-440 MHz20 MHz405-420 MHz (3 dB Degradation at limits) 450-470 MHz20 MHz450-470 MHz (3 dB Degradation at limits) 470-512 MHz20 Mhz490-510 MHz (3 dB Degradation at limits) UHF PROGRAMMING CHART TRANSMIT MONOGRAM SERIES LBI-38865 SPECIFICATIONS Page-3- Nov. 94 OPTIONS

33、 AND ACCESSORIES CONTROL STATION OPTIONS: NOT SHOWN: Antenna - MGAN1A Relay Kit - MGSU1C Noise Suppression Kit - MGPD1A Power Supply MGPS5V External Speaker MGZM7C Desk Microphone MGMC5H MONOGRAM SERIES LBI-38865 SPECIFICATIONS Page-4- Nov. 94 UNPACKING Figure 1 - Unpacking Diagram Check the carton

34、and packing material carefully for the following items: 1.Transceiver Unit 2.Microphone 3.DC power cord 4.Mobile Mounting Bracket 5.Assembly Hardware 6.Operating Guide Styrofoam not used Inner Packing is now cardboard tray box. MONOGRAM SERIES LBI-38865 UNPACKING Page-5- Nov. 94 INTRODUCTION The Con

35、ventional Monogram Series Radio is a rugged two-way FM mobile radio which operated in the 400-440 MHz, 450-470 MHz or the 470-512 MHz band split. The Monogram is a synthesized radio utilizing microcomputer technology to provide reliable high quality simplex two-way mobile communications. Its transmi

36、tter output power level is 40 watts over the wide bandwidth, with an allowable 10 MHz maximum receive channel separation. The basic radio package includes the following features: Microprocessor Control Synthesized RF Channel selection (frequency control) Vacuum Fluorescent Channel Selection Display

37、Channel Guard (CTCSS) Encode/Decode Digital channel Guard (DCG) Encode/Decode Priority Scan 5 PPM frequency stability Field Programmable with PC Variable Squelch Internal 5-watt Speaker, with volume control Side Mounted Microphone Connector Rear Mounted Antenna Connector (SO-239) Rear power connecti

38、ons The small size of the Monogram radio makes it ideal for front mounting in conventional vehicles. The radio is operated with a simple hand held microphone in combination with the operating controls described in the following section. MONOGRAM SERIES LBI-38865 INTRODUCTION Page-6- Nov. 94 DESCRIPT

39、ION OF CONTROLS FRONT PANEL CONTROLS 1.Squelch Control: The squelch control will silence the receiver when no signal is being received. 2.ON/OF/VOLUME Control: This is the main power switch and volume control. 3. Monitor Button (2): This button performs three functions: a.Disables tone or digital sq

40、uelch options when in receive mode. b.Returns to normal radio operation from the programming mode. c.Controls display intensity. 4.Auxiliary Speaker Button (1): This button silences the internal speaker and connects the auxiliary speaker (requires the auxiliary option printed circuit board to be ins

41、talled). It also deletes channels from the scan list while in the programming mode. 5.SCAN Push Button (S): This button turns the scan function ON (indicated by a red backlight) and OFF. It also serves as the ENTER function during SCAN programming. 6.PRIORITY SCAN Push Button (P): This button turns

42、the PRIORITY SCAN function ON (indicated by a red backlight) and OFF. It also provides access to the programming mode when the radio is turned on. 7. Channel Change buttons (CH): The channel change buttons allow the operator to scroll either up or down through the programmed channels. 8.Call Light I

43、ndicator (CALL): This green Light Emitting Diode (LED) indicator illuminates to indicate activity on the channel during receive when coded squelch or digital signaling options are used. 9.Busy Channel Indicator (BUSY): This yellow Light Emitting Diode (LED) indicator illuminates to indicate activity

44、 on the channel during receive. 10. Transmit LED Indicator (TX): This red Light Emitting Diode (LED) indicator illuminates during transmit mode. It also will flash to indicate that the synthesizer is out of lock. 11. Channel Display: The front panel display indicated channel number, priority scan nu

45、mbers, programming mode and error messages. FIGURE 2 - Front Panel Controls MONOGRAM SERIES LBI-38865 DESCRIPTION OF CONTROLS Page-7- Nov. 94 BACK PANEL CONNECTORS 1.External Speaker Connector: This 3.5mm diameter jack is provided for a 4 ohm external speaker. The internal speaker is silenced when t

46、he external speaker is connected. 2.Auxiliary Speaker Connector: This 3.5mm diameter jack is provided for an auxiliary speaker (Option MGSU1C Relay Kit is required). 3. Antenna Connector: An SO-239 type connector. The output load must be 50 ohms. 4.DC 13.8V Connector: Polarized plug for 13.8 VDC pow

47、er input - FOR NEGATIVE GROUND SYSTEMS ONLY. FIGURE 3 - Back Panel Controls MONOGRAM SERIES LBI-38865 DESCRIPTION OF CONTROLS Page-8- Nov. 94 OPERATION NOTE: The following description briefly outlines the operation of your UHF synthesized mobile radio. Consult the operators manual for a complete des

48、cription of all the modes of operation for which the radio is capable. RADIO ON/OFF, POWER UP 1.Turn the radio on by turning the VOLUME control one-half turn clockwise. After 4000 appears in the display and the power up alert tone is generated, the display will change to the #1 priority channel. If

49、no priority channel has been programmed, the display will change to channel 1. 2.Turn the radio off by rotating the VOLUME control fully counter-clockwise. RECEIVING A CALL 1.Turn the radio on and select the desired channel. 2.Depress the monitor button (2) if necessary to illuminate its backlight. Adjust the volume control to a comfortable listening level. 3.Rotate the SQUELCH control clockwise until the squelch noise (rushing sound) is no longer present. 4.Depress the MONITOR button (2) to extinguish the blacklight. NOTE: If the radio is equipped wi