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SERVICE
MANUAL
MOBILE
984X SERIES (UHF)
988X SERIES (800 MHZ)
989X SERIES (900 MHZ)
25 or 40 Watts (UHF); 15 or 30 Watts (800/900 MHz)
13.6 VDC
Part No. 242-98xx-xxx
Remote-Mount
First Printing
January 2001
Supersedes: Part No. 001-9800-200, 9/99
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98xx-SERIES FM TWO-WAY RADIO SERVICE MANUAL 13.6 VDC 25 or 40 Watts, UHF 15 or 30 Watts, 800/900 MHz Part No. 242-984x-2xx (UHF) Part No. 242-988x-2xx (800 MHz) Part No. 242-989x-2xx (900 MHz) Copyright © 2001 by the E.F. Johnson Company The E.F. Johnson Company, which was founded in 1923, provides wireless communication systems solutions for public safety, government, and commercial customers. The company designs, manufactures, and markets conventional and trunked radio systems, mobile and
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TABLE OF CONTENTS TABLE OF CONTENTS 1 GENERAL INFORMATION 3 CIRCUIT DESCRIPTION 1.1 SCOPE OF MANUAL . . . . . . . . . . . . . . . . . . . .1-1 3.1 GENERAL TRANSCEIVER DESCRIPTION 3-1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1 ® LTR , Low Tier, and Data Models . . . . . . . . . . 1-1 Circuit Protection (Fuses) . . . . . . . . . . . . . . . . . . 3-1 1.2 TRANSCEIVER DESCRIPTION . . . . . .
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TABLE OF CONTENTS TABLE OF CONTENTS (CONT’D) 3.10 SYNTHESIZER CIRCUIT DESCRIPTION 5 PARTS LIST (800/900 MHz MODELS). . . . . . . . . . . . . . .3-22 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-22 Front Panel Assembly and Mechanical Parts . . . 5-1 Voltage-Controlled Oscillator . . . . . . . . . . . . . 3-22 UHF RF and PA Boards . . . . . . . . . . . . . . . . . . . 5-3 VCO and TCXO Modulation . . . . . . . . . . . . . . 3-24 800/900 MHz RF and PA Boards . . . . . . .
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TABLE OF CONTENTS TABLE OF CONTENTS (CONT’D) 470-512 MHz RF LIST OF TABLES RF Board Schematic. . . . . . . . . . . . . . . . . . . 6-22 PA Board Schematic (25W). . . . . . . . . . . . . 6-23 1-1 Part Number Breakdown . . . . . . . . . . . . . . . . . . 1-2 VCO Board Layout . . . . . . . . . . . . . . . . . . . 6-24 1-2 Identification Number Breakdown . . . . . . . . . . . 1-3 PA Board Layout (25W) . . . . . . . . . . . . . . . 6-24 1-3 98xx Accessories . . . . . . . . . . . . . . . . . . .
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GENERAL INFORMATION SECTION 1 GENERAL INFORMATION 1.1 SCOPE OF MANUAL The data version of the 98xx transceiver has a front panel that is blank except for the programming 1.1.1 GENERAL jack. For servicing information on data models, refer to the LTR manual just described. This service manual contains installation and service information for all current 9800 series mobile The Multi-Net version of the 98xx transceiver has transceivers. These include the UHF 984x, 800 MHz a data interface tha
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GENERAL INFORMATION 900 MHz Models programming software. Programming is described in separate manuals as described in Section 1.1.1. Full band (896-902 MHz) operation. 1.2.6 TRANSCEIVER ALIGNMENT Only narrow band (12.5 kHz) models are available because the 900 MHz band has always had a 12.5 Alignment is performed using the standard kHz channel spacing. Personality programming setup and special Radio Tune software. There are only two or three adjust- High power (30W) and medium power (1
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GENERAL INFORMATION Table 1-3 98xx Accessories (Continued) 1.4 TRANSCEIVER IDENTIFICATION Accessory Part No. The transceiver identification number is printed Standard Key Cap Kits (5 key caps) on a label that is attached to the chassis. The informa- tion is contained in this number is shown in Table 1-2. Multi-Net 587-9840-001 This number is stored electronically and can be read LTR-Net 587-9840-002 using the programming software. SMARTNET/SmartZone 587-9840-003 Optional Key Cap Kits (20+ ke
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GENERAL INFORMATION Microphones and Speaker - The microphones have Desktop Accessories - The -113 and -213 power an impedance of 620 ohms, and all DTMF models supplies include a pedestal for mounting the trans- have backlighted keypad but no memory for storing ceiver and also include an internal speaker. The wedge numbers. The WR805 microphone is environmentally mounting pedestal includes a 10-ft power cable. Also sealed against such things as rain, sand, and dust. The required when this pede
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GENERAL INFORMATION When your call is answered, you will hear a brief number on your paperwork in case you need to call the message informing you of numbers that can be entered repair lab about your unit. These numbers are refer- to reach various departments. This number may be enced on the repair order making it easier and faster to entered during or after the message using a tone-type locate your unit in the lab. telephone. When you enter some numbers, another number is requested to furthe
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GENERAL INFORMATION UHF 984x SPECIFICATIONS The following are general specifications intended for use in testing and servicing this transceiver. For current advertised specifications, refer to the specification sheet available from your sales representative. Specifications are subject to change without notice. GENERAL Frequency Range 430-470 MHz and 470-512 MHz Operating Modes LTR (trunked) and Conventional (non-trunked) Systems and Groups Selectable Low Tier: Up to 16 system/group combination
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GENERAL INFORMATION 800 MHz 988x SPECIFICATIONS The following are general specifications intended for use in testing and servicing this transceiver. For current advertised specifications, refer to the specification sheet available from your sales representative. Specifications are subject to change without notice. GENERAL Frequency Range Transmit - 806-824 MHz Std., 851-869 MHz conv. talk-around Receive - 851-869 MHz Operating Modes LTR (trunked) and Conventional (non-trunked) Systems and Grou
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GENERAL INFORMATION 900 MHz 989x SPECIFICATIONS The following are general specifications intended for use in testing and servicing this transceiver. For current advertised specifications, refer to the specification sheet available from your sales representative. Specifications are subject to change without notice. GENERAL Frequency Range Transmit - 896-902 MHz Std., 935-941 MHz conv. talk-around Receive - 935-941 MHz Operating Modes LTR (trunked) and Conventional (non-trunked) Systems and Gro
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INSTALLATION SECTION 2 INSTALLATION 2 3 10 ft 1 8 7 Antenna Install 4 15A Fuse 10 6 2 6 ft Optional 5 11 9 Optional Speaker Miniature UHF Jack Item Item Description Part No. Description Part No. No. No. 1 Amplified dynamic microphone 250-0740-300 7 Screw, No. 10 self-drilling (4) 575-9077-545 2 Tri-knob (2) 547-0016-008 8 10-ft. DC power cable & hardware 023-9800-410 3 Standard mounting bracket 017-2229-005 9 Accessory pigtail cable (optional) 597-9800-003 4 Microphone hanger 023-3514-001 10
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INSTALLATION 2.1.3 TRANSCEIVER PROGRAMMING addition, do not place any other objects in the deployment area. The transceiver needs to be programmed before it is placed in service unless it was ordered as factory 2.2.2 INSTALLATION COMPONENTS programmed. Programming instructions are located in the manuals listed in Section 1.1.1. Transceivers are The following mounting kits are used to install normally shipped with preprogrammed factory test the transceiver. These components and other compo- c
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1 ft. 5 ft. INSTALLATION 7 6 ft. 9 6 8 10 11 17 5 Antenna 4 13 15 12 Miniature 14 UHF Jack 16 11 ft. 2 1 3 Item Item Description Part No. Description Part No. No. No. 1 Low profile mounting bracket 017-2229-010 9 Hanger ground wire assembly 023-7171-911 2 Screw, No. 10 self-drilling (4) 575-9077-545 10 Amplified dynamic microphone 250-0740-300 3 Tri-knob (2) 547-0016-008 11 Remote control unit --- 4 Accessory pigtail cable (optional) 597-9800-003 12 Tri-knob (2) 547-0016-008 5 Accessory wire kit
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INSTALLATION Strain Relief Grommet Accessory Pigtail Cable J101 R170 Figure 2-3 Accessory Cable Installation Proceed as follows to install the power cable: 6. Plug the power cable into the transceiver and recon- nect the negative battery cable. 1. Before beginning power cable installation, remove the negative cable from the battery to prevent 7. Install the antenna according to the manufacturer’s damage from accidental short circuits. instructions. This transceiver has a miniature UHF conne
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INSTALLATION Pin Function Accessory Cable From Transceiver 1 Speaker Out* 2 Sw Bat Out 3NC 4 Horn Alert Pin 8 5 Ground 6Ign Sense Insert Pin With 7Output D Tang Up 8NC * This is a low level output (see Section 2.4.5) Pin 1 Figure 2-4 Accessory Cable Connector 2.4.2 ACCESSORY PIGTAIL INSTALLATION The horn alert (LTR-Net/Multi-Net) may be auto- matically disabled when the ignition switch is on. 1. Remove the bottom cover of the transceiver to access the audio/logic board. A transceiver
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INSTALLATION Installing Ignition Sense Wire Assembly For this output to operate properly, the audio amplifier requires an 8-ohm load. Therefore, if not The ignition sense input is connected using the using the internal speaker and no speaker is connected connector with the 22-foot red wire pre-installed in pin to the external speaker jack, connect an 8-ohm, 5-watt 6. The white jumper between pins 1 and 3 is not used resistor to the external speaker jack. with this transceiver, so it can be c
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INSTALLATION Data Pigtail Cable Two User-Definable Wires Strain Relief Accessory Pigtail Cable J301 J701 Figure 2-6 Data Cable Installation (-001 Cable Shown) installed. Then install the mounting bracket using internal speaker is automatically disabled when an the included self-tapping screws or other screws if external speaker is used. desired. The impedance of the external speaker must not 2. Install the control unit in the bracket using the be less than 4.0 ohms. Using a speaker with an
