GE LBI-38378C User's Manual
Contents
1. 9 OPERATOR MANUALS ed Se 11 OPERATING TIPS Ot 11 INTRINSICALLY SAFE USAGE z s he Ges g a wea 11 PACKS 24 5 Soe reg ee 11 wos ate 11 MAINTENANCE ne ca ne Ok eth A 12 PREVENTIVE MAINTENANCE z 12 DISASSEMBLY REASSEMBLY 13 ILLUSTRATIONS d System Mode aai bk a ed amp ae hae ee bok oe 7 2 Scan Model 24 3 Be ela bok Gt ee Ged a we Be OS HS 7 51490 View hee RRS eS ES AES 7 SDC Pins Oue Ac De 10 ae Bak ke G 13 Figures 7 8 Disassembly Reassembly Diagrams 14 Figures 9 10 Disassembly Reassembly Diagrams 15 Figure 11 Rear Cover Assembly Block Diagram 16 Figure 12 Front Cover Assembl2. Extra High Capacity Tall Case Rechargeable Battery Pack 19A704850P6 High Capacity Short Case ACCESSORIES The accessories that follow are approved for use with intrinsically safe radios Use of accessories other than those listed voids Factory Mutual approval PAABIA Headset Microphone 19 801 508 3 PAACIA Earpiece Kit 19 801 508 2 GE STAR Lanyard 19B801508P8 Speaker Microphone 19B801508P1 Speaker Microphone with 19B801508P4 GE STAR Lanyard PAAE Speaker Microphone Antenna 19B801 508 6 LBI 38378 PANCIB Antenna 136 151 MHz Helical 19B234804P1 PANCIC Antenna 146 162 MHz Helical 19B234804P2 Antenna 157 174 MHz Helical 19B234804P3 PAHCIC Belt Clip Swivel Mount with Belt Loop Case Leather with Belt Loop Short Case Case Leather with Belt Loop Tall Case PAHC1G Case Leather with Swivel Mount and Belt Loop Short Case PAHC1H Case Leather with Swivel Mount and Belt Loop Tall Case Shoulder Strap Leather with Mounting Plate PAHC5R Holster Plastic MAINTENANCE The M PA radio is a very reliable unit and will normally provide many years of trouble free service The recom mended Preventive Maintenance procedures that follow should be performed when a technician comes in contact with a unit Component level troubleshooting informa
3. e Backlit Liquid Crystal Display 8 digit alphanumeric LCD _ provides programmable customization and feedback to the operator of various operating conditions Status flags located above and below the digits alert the operator to various radio conditions such as channel busy transmitter in operation or a low battery condition Scan and System model radios have additional status flags for scan operation LCD backlighting can be enabled or disabled on a per channel basis e Rotary Control Knob On Scan and System model radios the 16 position top mounted Control Knob allows easy selection of modes banks of channels channels or Channel Guard CG according to how the radio is programmed On the Select model radio the Control Knob selects the operating channel A stop plate may be installed under the knob to limit the maximum number of positions to less than sixteen 16 It is normally factory installed for fifteen 15 positions Volume Control Knob This rotatable control provides quick and easy adjustments to the volume level Minimum volume levels can be programmed into the unit This feature prevents missed calls due to a low volume setting Monitor Button This side mounted button is used to disabled squelch and if programmed for the selected channel it is used to toggle CG and or T99 operation on and off Keypad The Scan model radio has a 4 button keypad on its front panel that provides scan and menu control
4. ALWAYS remove the battery pack before disassem bling the unit to avoid blowing the fuse or causing other component damage This radio contains CMOS ICs that can be damaged by static electricity Observe static handling precau Tools Required TORX T6 Driver e 5 Hex Driver or Wrench Needle Nose Pliers e Small Flat Blade Screwdriver e Spanner Wrench top antenna jack e Spanner Wrench UDC antenna jack e Spanner Wrench volume control and group channel switch Front and Rear Cover Separation Lay the radio face down and loosen the four 4 Torx screws A on the back of the radio complete screw re moval is not necessary See Figure 6 Separate the covers by carefully lifting the Rear Cover Assembly straight up to avoid bending the connector pins between the RF and Con trol Boards When reassembling the unit verify the rubber gasket surrounding the perimeter of the cover is in good condition and it is in the groove Also verify the connector pins align properly For proper operation the screws should be tight ened so there is no gap between the covers It is recom mended that the top screws be tightened first while squeezing the radio together to ensure the gap is completely closed The bottom screws can then be tightened TABLE 3 TORQUE SPECIFICATIONS Rear Cover Assembly Antenna Insert UDC RF Connector RF Board Eggcrate Screws PA Support Screws Antenna Switch SW1 Screw Front Cover Ass
5. The menus allow selection of the current operating mode bank of channels and or channel depending upon the radio s programming The menus also allow control of various other radio features such as selection of stored telephone interconnect numbers for auto dial operation and alert tone enable disable control A System model radio has a 16 button keypad The top four 4 buttons are identical to the Scan model keypad providing scan and menu control The lower twelve 12 buttons form a numeric keypad that allows manual DTMF telephone interconnect dialing and editing of telephone interconnect numbers stored in the radio Select model radios do not have a keypad Scan Capability Scan and System model radios can be programmed for non priority scan or dual priority scan operation Scan programming options include a keypad entered scan list or a fixed scan list Priority scan programming options include fixed priority one channel or the selected channel as the priority one channel The radio can be programmed to scan only the channels in the current mode bank of channels or it may be programmed to scan across modes The Select model radio does not support scan operation Telephone Interconnect Capability The Scan and System model radios can store up to ten 10 telephone interconnect numbers for auto dial operation These numbers are preprogrammed into the Scan model radio In the System model radio the numbers can be preprogramm
6. This UDC antenna connection is also utilized for external antenna operation when the radio is locked in the vehicular charger 38378 VOLUME ANTENNA CONTROL KNOB TYPICAL CONTROL KNOB VOLUME CONTROL HAOR EMERGENCY CONTROL KNOB BUTTON LIQUID CRYSTAL DISPLAY CRYSTAL DISPLAY KEYPAD BUTTONS a UNIVERSAL a SELECT DEVICE gt CONNECTOR ie MONITOR SCAN BUTTON PTT BUTTON MICROPHONE SPEAKER BATTERY PACK BATTERY r TYPICAL TYPICAL Figure 1 System Model Figure 2 Scan Model ANTENNA TYPICAL VOLUME CONTROL KNOB TYPICAL CONTROL KNOB EMERGENCY BUTTON e ANTENNA JACK i 1 7 CRYSTAL DISPLAY UNIVERSAL DEVICE CONNECTOR MONITOR MONITOR BUTTON CONNECTOR BUTTON MICROPHONE SPEAKER BATTERY PACK TYPICAL ON OFF SWITCH Figure 3 Select Model Figure 4 Side View All Models LBI 38378 REAR COVER ASSEMBLY The Rear Cover Assembly houses the RF Board in the die cast aluminum case The complete assembly consists of the VHF Board aluminum case top antenna jack side UDC antenna jack and various hardware The RF Board s circuitry includes the transmitter re ceiver and the frequency synthesizer This FM circuitry is under complete control of the microprocessor circuits Con trolling data sent to thi
7. available antennas which mount in the antenna jack on the top of the radio An exter nal antenna can be mounted to the unit via the UDC When an antenna is connected to the UDC the antenna on the top of the radio is disabled BATTERY PACKS The battery pack connects to the bottom of the unit and delivers a nominal 7 5 Volts dc to the radio A recessed on off switch for the radio is located on the battery pack An internal fuse located in the radio s Battery Plate protects the radio and battery from excessive current draw The battery packs are available in several different capacities and sizes Radio contacts located on the top of the pack include switched power ground the speaker enabling contacts and a continuous power contact In addition four contacts are lo cated on the rear of the battery pack These four contacts provide connections to the slip in type chargers or vehicular chargers repeaters while the battery pack is still connected to the unit The battery charging contacts are diode protected from external shorts The chargers utilize an internal thermistor in the battery pack to sense temperature and automatically control charge rate of the battery This allows for a maximum charge rate without overheating the battery pack All battery packs can be charged in less than 1 1 2 hours with the rapid type chargers Nominal full charge time in a standard charger is 14 hours The Service Section contains a detailed outline and s
8. terface and connection between the PC and the radio when the personality is transferred from the PC into the radio NOTE After programming or reprogramming the radio dis connect the programming cable and turn the radio off and then back on This action will take the radio out of programming mode and restore normal operation FEATURES PROGRAMMABLE ON A PER CHANNEL BASIS e Transmit and Receive Frequencies e 5 Designator Alphanumeric Display Channel e Tone or Digital Channel Guard Encode Decode e Type 99 Tone Decode Enabled or Disabled e Transmit Power Level High or Low e Transmit STE On or Off e Channel Busy Lockout Enabled or Disabled e Carrier Control Timer e Backlight On or Off e Alert Tones On or Off e Switch Crystal Frequency Enabled or Disabled GE STAR Enabled or Disabled GE STAR sent with Channel Guard e Channel on Default Fixed Scan List FEATURES PROGRAMMABLE ON A PER MODE BASIS e Channel Data e 5 Designator Alphanumeric Display Mode e Type 99 Group Set Selection One or Two e Priority One and Priority Two Scan Channels e DTMF Enabled or Disabled GE STAR Channel e Home Channel FEATURES PROGRAMMABLE ON AN OVERALL RADIO BASIS e Minimum Volume Level Power Up Beep On or Off e Transmit Backlight On or Off e Backlight On or Off when in Vehicular Charger GE STAR And GE STAR Emergency Options LBI 38378 TABLE 2 UDC
9. 1 7 a dl LOW PASS PWR CONTROLLER 7 5 19 TX AUDIO L L D2 C35 BANDPASS FILTER LOOP FILTER REGULATOR 5 5 7 5 1 BANDPASS FILTER FL1 2 QUAD COIL 54 BANDPASS U6 FILTER 2ND OSC MIXERIF 4 FL2 LIMITER DISCR Figure 11 Rear Cover Assembly Block Diagram 16 BLOCK DIAGRAM LBI 38378 CONTROL BOARD LCD BOARD EMERGENCY SWITCH BOARD 1 2 3 4 6 SWITCH if fs 1 2 4 Q1 Q2 8 4 A 22 VOL SWITCH a CTL 012 015 8 1 2 3 4 5 6 7 8 9 10 11 12 7 5 1 2 3 4 5 6 7 8 9 10 11 12 HH PORT 2 RF TX AUDIO UDC MUTE aa 1411 EXT EMER EXT PTT 1 0 PROCESSOR TX DATA NOTE J1 P1 NOT 5 0 COMPLETELY SYN CLOCK 20 SYNDATA R100 21 SYN ENABLE gt CACDATA 2 w COMPOUT gt gt J3 P3 1 SPKR AUDIO AMP SPKRLO SPKR us 3 N 7 5 BATTERY Figure 12 Front Cover Assembly Earlier And Control Board Block Diagram 17 LBI 38378 Later Front Cover Assembly Keypad Flex Removal To remove the Keypad Flex first remove the UDC Flex UDC Monitor Button PTT Switch assembly as pre viously stated Next remove the screw
10. ES Radios Antennas Batteries Carrying Accessories A HELICAL ANTENNA ANTENNA 1 ANTENNA ANTENNA BELT CLIP SWIVEL MOUNT CARRYING CASE 5 WITH BELT LOOP 203 WITH SWIVELMT SHOULDER Swivel Mount Plate PAHG 3 STRAP 5 Audio Accessories HEADSET MIC EARPIECE SPKR MIC PAABIA 17 INTERFACE CONNECTOR GE STAR HIGH CAPACITY BATTERY Provided with 1 1 PAPAIG INTRINSICALLY SAFE HIGH CAPACITY BATTERY 1 EXTRA HIGH BATTERY INTRINSICALLY SAFE EXTRA HIGH CAP BATTERY MULTI CHARGER 2 21 2 120 VAC 14 H2A2J1A 120 VAG 1 2 2 240 VAC 14 HR H2A2N 1A 240 VAC 1 HR COMPACT CHARGER H2A5C 2A Vehicular Charger UNIVERSAL UNIVERSAL DESK CHARGER 2 2 Desk Charger 1 120 VAC CHIRAI 120 VAC 1 VEHICULAR CHARGER CH6SA1 120 14 15 1 120 VAC 14 HeVvol J Vehicular Charger 230 VAC 1 230 VAC 1 HA 2 Vehicular Char Apte Control GHBSA2 230 VAC 14HR CH1SA2 230 14 LBI 38378 INTRODUCTION The M PA radio is a high quality microprocessor con trolled synthesized portable FM radio M PA operation is highlighted by the radio s pro
11. LBI 38378C Mobile Communications M PA PORTABLE FM RADIO TABLE OF CONTENTS REAR COVER ASSEMBLY LBI 38597 FRONT COVER ASSEMBLY EARLIER AND CONTROL BOARD LBI 38384 FRONT COVER ASSEMBLY LATER LESS CONTROL BOARD LBI 38834 CONTROL BOARD LATER LBI 38828 VHF SERVICE SECTION LBI 38385 Maintenance Manual LBI 38378 TABLE OF CONTENTS Page SC CAIN De ee 3 OPTIONS ANDACCESSORIBS eee Ro eee Be 4 INTRODUC HON wd whee Coe a bed oe oe 5 PEAFURE S oe ca et oe oe he ee oe ee Sev ke a hea oe he Se a ee 5 DESCRIPHON ie cs ee ec ee ae ee ee eS 6 REARCOVER ASSEMBLY 5 hE BE ee ee a nc Eh ae aa 8 FRONT COVERASSEMBLY otc amet See awd ESS Zeke 8 ANTENN i ea BS ade ws Sy AG ae te Os ee A 8 BAFTERY te es Ree at Ba 9 UNIVERSAL DEVICE CONNECTOR 9 PROGRAMMING FEATURES PROGRAMMABLE ON PER CHANNEL BASIS 9 FEATURES PROGRAMMABLE ON MODE BASIS 9 FEATURES PROGRAMMABLE AN OVERALL RADIO BASIS
12. PIN FUNCTIONS OUTPUT 7 10 12 13 34 REAR FRONT COVER COVER RF CONNECTOR Figure 5 UDC Pin Out 10 LBI 38378 e Two individual Type 99 Tone Group Sets e Control Knob selects Channels Modes or Channel Guard e Menu Selections Home Mode or Home Channel depending on Control Knob programming or Disabled e Scan Enabled or Disabled e Scan with Channel Guard Enabled or Disabled e Scan Across Modes Enabled or Disabled Priority One Scan Channel is the Selected Channel Fixed Channel or Keypad Entered Channel e Ten 10 Telephone Numbers and Names DTMF Options Scan and System models only OPERATOR MANUAL Complete operating details for the M PA radios are in cluded in LBI 38377 This operator s manual contains de tailed operating procedures for the Select Scan and System model radios OPERATING TIPS Antenna location and condition is important when using a VHF radio Operating the radio in low areas of terrain un der power lines or bridges inside of a vehicle or in a metal or steel framed building can severely reduce the range of the unit Mountains and buildings can also reduce the range of the unit In areas where transmission or reception 15 poor some improvement maybe obtained by insuring that the antenna is vertical Moving a few yards in another direction or moving to a higher elevation may also improve communication Ve hicular operation can be aided wit
13. arlier Front Cover Assembly has an additional screw located just below connectors J4 P4 DD See Figure 8 Remove the shield Many of the test points on the Control Board are acces sible at this point however the Front Cover Assembly should not be powered up without first reinstalling the screw into the lower right hand hole to ground the board Also the three 3 screws securing the top flex connectors need to be reinstalled for good flex connections USE CAU Figure 8 Control Board Access LBI 38378 TION Installation of screws that are longer than the origi nals may damage the LCD Board flex circuits or the threads To remove the Control Board remove the Torx screw in the lower left hand corner that supplies battery power to the board An earlier Front Cover Assembly has an addi tional screw located just below connectors J1 P1 EE Lift the board and carefully unplug Speaker Flex plug P3 from J3 on the Control Board Avoid bending this or any other flex circuits at sharp angles The Control Board may now be removed Note the battery power and ground connections at the bottom of the board where the screws have been re moved Speaker Microphone and Flex Circuit Access Remove the Control Board as previously stated and then remove the six 6 Torx screws that secure the die cast shield Remove the die cast shield by lifting the top end first and sliding it towards the top of the radio The internal speaker mi
14. chematic diagram of a typical battery pack Further service information for the battery packs is also presented in the Service Section Chargers are available with nominal charge times of one hour rapid and fourteen hours standard Combinations include single 1 and multi 5 or 6 position standard and rapid charge units In addition the vehicular chargers simul taneously charge the battery while the radio is operating The battery packs should be fully charged in an appro priate charger before they are placed into service This ap plies to new battery packs received from the factory and to battery packs that have been stored for long periods of time A fully charged battery pack should have an open terminal voltage greater than 7 5 Volts typically 9 0 Vdc A battery TABLE 1 VHF ANTENNAS USABLE FREQ RANGE MHz OPTION COLOR NUMBER PART NUMBER TYPE BANDS LBI 38378 pack in need of a charge will cause the low battery BAT status flag on the radio to turn on This flag will turn on when the battery pack s voltage drops below approximately 6 8 Volts The low battery alert tone will also be heard when the battery pack needs charging RECHARGEABLE BATTERY PACK DISPOSAL The product that you have purchased contains a Cs chargeable battery The battery is recyclable At the end of its useful life under various state and Ni Cd local laws it may be illegal to dispose of this bat tery into the muni
15. cipal waste stream Check with your local solid waste officials for details in your area for recycling op tions or proper disposal Call Toll Free 1 800 822 9362 for information and or procedures for returning rechargeable batteries in your state UNIVERSAL DEVICE CONNECTOR The UDC is located on the side of radio just above the PTT and Monitor Buttons Various equipment such as the audio accessories can be connected to the radio via the UDC The programming equipment is also connected to it when the personality is programmed into the radio The UDC furnishes an excellent first check point for initial bench checks without the need to disassemble the radio Ta ble 2 lists all pins and their appropriate function When the radio is turned on it senses the resistance value between UDC pins 9 and 1 and switches the appropriate circuits to provide proper radio to accessory operation PROGRAMMING The radio s personality is programmed using an IBM PC or compatible computer A full screen portable PC can be used for field programming The Programming Manual and Software is TQ 3339 and TQ 4339 TQ 3339 is sup plied with 5 1 4 inch floppy disks and TQ 4339 is supplied with 3 1 2 inch disks This software uses a series of screens and windows to guide you through a programming session See TQ 3339 or TQ 4339 for further programming details PC Programming Adapter TQ 3370 and Programming Ca ble TQ 3311 will also be required These items provide in
16. crophone Keypad and UDC Flex circuits are now partially accessible See Figure 9 KEYPAD FLEX UDC FLEX ASSEMBLY MICROPHONE GASKET SPEAKER SPEAKER FLEX Figure 9 Speaker Microphone And Flex Circuit Access UDC Flex UDC Monitor Button PTT Switch Assembly Removal If UDC Flex UDC Monitor Button PTT Switch assem bly removal is necessary first un solder the microphone With a spanner wrench remove the UDC securing screw the UDC ground pin Remove the insulator foam or plas tic on the inside side rail of the case Lift the UDC Monitor Button PTT Switch assembly from the side of the case and slide the flex through the slot Earlier Front Cover Assembly Keypad Flex Removal To remove the Keypad Flex first remove the UDC Flex UDC Monitor Button PTT Switch assembly as pre viously stated Next remove the knobs using the hex driver Unscrew the two 2 screws securing the top panel and lift and remove the panel Lift the Emergency Button Board by carefully unplugging 76 from P6 With a spanner wrench remove the nuts securing the volume and channel controls and carefully slide the controls inside the radio Unscrew the two 2 screws G and GG and remove the J10 P10 Zebra strip securing plate HH See Figure 10 The Keypad Flex is now free for removal Figure 10 Keypad Flex And LCD Board Access LBI 38378 BLOCK DIAGRAM RF BOARD J101 5 4 5 UDC 4 c8 C32 1
17. ed operator entered and or edited via the numeric keypad The System model s numeric keypad also allows manual tele phone interconnect dialing The Select model radio cannot initiate telephone interconnect calls LBI 38378 e Programmable Multi Tone Channel Guard CTCSS Channel Guard tone frequencies within the range of 67 Hz to 210 7 Hz including all of the standard EJA frequencies can be programmed for encoded decoded operation e Programmable Multi Code Digital Channel Guard Similar capability as with tone Channel Guard is provided Two Tone Sequential T99 Decode Selective calling decode is enabled or disabled on each individual channel Two 2 sets of unique de codes are programmable to allow large systems individual and group call capability Sets are selectable on a mode bank of channels basis Channel Busy Lockout Personality information includes transmit disable capability on a channel where carrier activity is present This feature is selectable on a per channel basis GE STAR Compatibility The radio can be programmed to transmit GE STAR at PTT key at PTT unkey or both 16 384 individual ID codes are available Emergency Signalling Feature GE STAR emergency signalling can be enabled by the red Emergency Home Button on the top of the radio or it can be enabled by a lanyard connected to the UDC Home Button The radio can be programmed to switch to a home mode or channel d
18. embly Knob Set Screws earlier Knob Set Screws later Group Channel and Volume Nuts UDC Ground Screw All M1 6 and M2 Screws Figure 6 Front And Rear Cover Separation LBI 38378 RF Board Access Holes are located in the RF Board shield for alignment of the Reference Oscillator U3 Modulation Balance pot R18 VCO Modulation pot R19 2nd Local Oscillator Adjustment T1 and the Quadrature Detector Adjustment T2 To align these items shield removal is not necessary If removal of the RF Board from the case is necessary first remove the UDC antenna jack and the top RF antenna jack with appropriate spanner wrenches Next remove the five 5 Torx screws B that secure the shield then lift and remove the shield Remove the two 2 remaining Torx screws C near the Power Amplifier Module The RF Board and eggcrate casting can now be lifted from the Rear Cover to gain access to the chip component side of the board If necessary the RF Board can be separated from the eggcrate casting Remove the two 2 Torx screws that secure the Power Amplifier Module and remove the four 4 screws on PARTIAL VIEW OF RF BOARD Figure 7 RF Board Access 14 the chip component side of the board that secure it to the casting Reassemble the unit in reverse order Observe screw lengths Control Board Access To gain partial access to the Control Board remove the five 5 screws D securing the shield and board An e
19. epending on Control Knob s programming when the Emergency Home Button on the top of the radio is pressed e Programmable Carrier Control Timer A programmable transmit timer will automatically disable the transmitter and provide an alerting tone after time out This feature prevents radio damage and unnecessary channel traffic in the event of a stuck mic The CCT is reset on every PTT e Programmable Transmit Power Level Transmitter power level is PC programmable into the radio high or low on a per channel basis e Squelch Tail Elimination Squelch and audio circuits are designed so that annoying squelch pops which may occur at the end of received messages are minimized This feature 15 compatible with existing STE systems e Alert Tones Alert tones prompt the operator of various radio conditions such as key pressed CCT time out or a low battery Power Up Self Test At power up the radio automatically performs a diagnostic test on itself and reports any found errors via the LCD e Programmable via the Universal Device Connector UDC The entire operation of the radio can be field customized by programming the unit using an IBM PC or compatible computer The programmed personality is stored in nonvolatile memory within the radio Simple Remote Control Capability External accessories can be connected to the UDC such as a headset a speaker mic or a lanyard Connection of the speaker mic allows the op
20. erator to remotely control operation and audio level of the external speaker An antenna jack is located on the UDC for the connection of a remote mounted antenna such as when the radio is used in a vehicular charger e Meets MIL 810C and Specifications The sturdy die cast aluminum case is designed to seal out moisture blowing rain and other harsh environmental factors e Battery Packs Several different battery pack sizes and capacities are available e Available Options These options include the antennas audio accessories batteries carrying accessories chargers lanyards and the vehicular chargers DESCRIPTION Two major assemblies form an M PA radio The Front Cover Assembly contains all of the microprocessor circuitry audio circuitry and the operating controls The Rear Cover Assembly houses the RF circuitry which includes the trans mitter receiver and the frequency synthesizer The assem blies are electrically interconnected by two single in line type connectors When mated together the assemblies form a weather resistant diecast aluminum case that protects the radio s circuitry from harsh outside environments Power is provided by a battery pack that slides and locks on to the bottom of the radio The radio s on off switch is located on the battery pack The antenna screws on to the top of the unit A side an tenna connection 15 also provided at the UDC for an external antenna or for test purposes
21. gramming versatility This al lows tailored operation of the portable radio to meet the needs of the radio system and the individual users Three 3 different M PA radio models are available Select Scan and System The M PA Select model radio is the basic version that can be programmed with up to sixteen 16 channels This unit features an 8 digit alphanumeric liquid crystal display LCD and a 16 position knob for channel selection The display is backlit for nighttime and low level ambient light operation Scan and System model radios have an LCD similar to the Select model radio A keypad 15 added to these radios 4 button on Scan model 16 button on System model to pro vide additional features not available on the Select model radio These radios can be programmed with up to 192 dif ferent radio channels Both also provide scan capability in cluding dual priority scan and telephone interconnect of up to ten 10 preprogrammed numbers The telephone numbers can be recalled at will and initiated The System model s numeric keypad allows editing of the ten preprogrammed numbers and manual DTMF telephone in ter connect dialing FEATURES e 192 Channel Capability Scan and System models radios can be programmed with up to 192 channels accessed in 12 modes banks of channels with 16 channels in each mode or 16 modes with 12 channels in each mode The Select model radio can be programmed with a maximum of 16 channels
22. h the use of an externally mounted antenna Battery condition is another critical factor in the trouble free operation of a portable radio Observe the procedures listed in the Service Section to insure the battery packs do not develop the Memory Effect Always observe all of the Federal Communication Commission s rules and regulations during any service or operating procedure INTRINSICALLY SAFE USAGE Selected portable radios with appropriate factory in stalled F4 Options are certified as Intrinsically Safe by the Factory Mutual Research Corporation Intrinsically Safe ap proval includes Class I II Division hazardous loca tions in the presence of Groups C D E F and G atmospheres Non Incendive approval includes Class I Di vision 2 hazardous locations in the presence of Groups A B C and D atmospheres Hazardous locations are defined in the National Electri cal Code Useful standards NFPA 437A and NFPA 437M for the classifications of hazardous areas can be ordered from the National Fire Protection Association Batterymarch Park Quincy MA 02269 BATTERY PACKS Only battery packs identified with a green latch shall be used with a portable radio that is rated and labeled as Fac tory Mutual Intrinsically Safe Use of non specified battery packs voids Factory Mutual approval The following battery pack options are approved for use in intrinsically safe ra dios PAPAIF Rechargeable Battery Pack 19A704860P6
23. ity Battery Voltage Dimensions H x W x D less battery knobs and antenna with Extra High Cap Battery Weight less battery and antenna with Extra High Cap Battery TRANSMITTER Rated RF Power Output High Low RF Power Output Maximum FM Deviation FM Hum and Noise Spurious and Harmonic Emissions Audio Response Audio Distortion RECEIVER Sensitivity 12 dB SINAD Adjacent Channel Selectivity Critical Squelch Intermodulation Spurious and Image Rejection Audio Output Audio Response Audio Distortion LBI 38378 SPECIFICATIONS 136 150 8 MHz 146 162 MHz AXATR 182 B5 157 174 MHz 182 5 TR 182 D2 5 0 ppm 16 192 192 full bandsplit 30 kHz 30 C to 60 C 90 at 55 C 7 5 Vdc nominal 140 x 69 x 38 mm 5 52 x 2 72 x 1 50 232 x 69 x 40 mm 9 15 x 2 72 x 1 58 540 grams 19 ounces 907 grams 32 ounces 6 0 Watts 6 0 Watts 1 Watt programmable per channel 5 kHz 45dB companion receiver 75 dBc 1 to 3dB 6 dB octave pre emphasis from 300 Hz to 3 kHz less than 3 at 1000 Hz tone 3 kHz deviation 116 dBm 0 35 80dB 10dB SINAD 78dB 80dB 500 mW 24 ohm load impedance 2 to 8dB 6 dB octave de emphasis from 300 Hz to 3 kHz less than 5 at 500 mW These specifications are intended primarily for the use of the serviceman See the appropriate Specifications Sheet for the complete specifications LBI 38378 OPTIONS AND ACCESSORI
24. s assembly from the Control Board includes serial synthesizer data loading transmitter receiver enabling and a transmitter power level signal The RF Board outputs the demodulated audio and a synthesizer lock status line to the Control Board During transmitter operation the power appears at the top antenna jack or the UDC jack if the appropriate adapter plug is inserted The Rear Cover Assembly maintenance manual contains a detailed circuit analysis mechanical outline and schematic diagrams for this assembly FRONT COVER ASSEMBLY The Front Cover Assembly houses all of the operating controls and the digital control circuitry for the radio Board assemblies used in this assembly include the Control and LCD Boards and flex circuits include the Keypad UDC and Speaker Flex circuits The speaker microphone and Battery Plate are also a part of this assembly The complete assem bly is housed in the die cast aluminum front cover Scan and System model radios are equipped with a keypad on the front panel The Control Board located in the Front Cover Assembly is the largest and most complex board in the Front Cover Assembly It contains all microcomputer and audio circuitry which controls the radio See the maintenance manuals spe cific to the Control Board or the Front Cover Assembly for service information on the related assembly ANTENNAS Antennas are selected based on the operating frequency range of the radio Table lists the
25. securing the emer gency switch support G then remove the support Remove the knobs using the hex driver With a spanner wrench re move the nuts securing the volume and channel controls and carefully slide the controls inside the radio Unscrew the two 2 screws that secure the J10 P10 connection at the bottom of the LCD Board Remove the screws the plate and the rubber pad The Keypad Flex is now free for removal Speaker Flex Removal In order to replace the Speaker Flex it must be un sol dered from the speaker and the Battery Plate LCD Board Access To remove the LCD Board partial removal actually re positioning of the top areas of the Keypad Flex is required UDC Flex UDC Monitor Button PTT Switch assembly re moval is not necessary After the top areas of the Keypad Flex have been freed as previously outlined the LCD Board can be removed At this point is the disassembly process an earlier Front Cover Assembly has two 2 screws on the left side as view from the back J and JJ and a later assembly has a single screw in the upper left hand side J See Figure 10 Ericsson GE Mobile Communications Inc Mountain View Road Lynchburg Virginia 24502 Printed in U S A 18
26. tion is contained in the Service Section 12 PREVENTIVE MAINTENANCE Antenna The antenna and antenna contact should be kept clean and free from dirt or corrosion If the antenna contact should become dirty or corroded communication range could be reduced Battery Packs Insure the battery packs are properly maintained Do not over or under charge them on a regular basis Verify the contacts are clean and free of corrosion Mechanical Since portable radio units are subject to shock and vi bration check for loose plugs knobs screws etc Transmitter Check Check transmit frequency and deviation Normally these checks are made when the unit is first put into opera tion They should be repeated after the first month of opera tion then annually Receiver Check Receiver sensitivity should be checked periodically as an indication of overall receiver operation Cleaning If the unit requires an external cleaning use mild soap and a damp cloth Avoid abrasive cleaners or chemicals which may damage the plastic or rubber surfaces on the unit LBI 38378 DISASSEMBLY REASSEMBLY In the event internal service is required disassemble the radio in accordance with the following outlined steps See Figures 6 10 Reassemble the unit by following the steps in reverse order Observe screw lengths and do not over tighten the screws when reassembling the unit Torque specifications are listed Table 3 CAUTION
27. y Earlier And Control Board Block Diagram 17 Tole be Be ot Se Gia ee Se VE ie Ue Bp we 8 UDO Fin PuncoOns Geko ao EE eee 10 TOrdue SpeciicallOns gt Beek RE es 13 NOTE The software contained in this device is copyrighted by Ericsson GE Mobile Communications Inc Unpublished rights are reserved under the copyright laws of the United States This manual is published by Ericsson GE Mobile Communications Inc without any warranty Improvements and changes to this manual necessitated by typographical errors inaccuracies of current information or improvements to pro grams and or equipment may be made by Ericsson GE Mobile Communications 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 transmit ted in any form or by any means electronic or mechanical including photocopying and recording for any purpose without the express written permission of Ericsson GE Mobile Communications Inc Copyright November 1989 General Electric Company 2 GENERAL Frequency Bands FCC Type Acceptance Number DOC Number Frequency Stability Channel Capacity Select Model Scan Model System Model Maximum Frequency Separation Channel Spacing Operating Temperature Range Maximum Relative Humid
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