GTX/LTS2000 Handheld Radio Service Manual Part 1 of 3
Contents
1. GTX Model Number H 1 1 W C D 4 C B 1 A N Position 1 2 3 4 5 6 7 8 9 1011 12 A A A A A as TT 3 1 1 Position 12 Position 1 Type of Unit Unique Model Variations H Hand Held Portable Standard Package Position 2 amp 3 Model Serigs Position 11 Version ersion Letter Alpha Major Change Position 4 Frequency Band Position 10 Feature Level 896 941 MHz Basic Position 5 Power Level Position 9 Primary System Type 3W Privacy Plus Position 6 Physical Package Position 8 Primary Operation Standard Control with Display Trunked Twin Type Position 7 Channel Spacing 12 5 kHz LTR Model Number H 1 1 W C D 4 C U 1 A Position 1 2 3 4 5 6 7 8 9 1011 12 A A A A lt 1 Position 12 Position 1 Type of Unit Unique Model Variations H Hand Held Portable Standard Package Position 2 amp 3 Model Serids Position 11 Version ersion Letter Alpha Major Change Position 4 Frequency Band Position 10 Feature Level 896 941 MHz Basic Position 5 Power Level Position 9 LTR 3W Position 6 Physical Package Position 8 Primary Operation Standard Control with Display Trunked Twin Type Position 7 Channel Spacing 12 5 kHz LTS 2000 Model Number H 1 0 W C H 4 D C 5 A Position 1 3 4 5 6 7 8 9 1011 12 A A 2 A A x A r Position 12 Position 1 Type of Unit Unique Model Variation H Hand Held Portable Standard Package Position 2 amp 3 Model2. 5 Remove the ribbon cable connector from the main board using pliers or a flat blade 1 Place radio chassis side down on a flat screwdriver Figure 1 4 surface 2 Apply downward pressure to chassis directly above one of the clips opposite PTT switch 3 With a flat blade screwdriver carefully move clip away from tab on chassis to release NOTE Remove both clips opposite the PTT switch first to ease remaining clip removal Front Cover Flexible Circuit 4 Repeat steps 2 and 3 for the remaining three clips Figure 1 4 Remove Ribbon Cable Connector 5 Separate the main board from the chassis Figure 1 6 1 2 68P02948C90 O February 1997 GTX GTX LTRATS 2000 Portable Radios Service Manual RAGassembly Assembly Radio Reassembly Gasket Main RR ac a Figure 1 8 Remove Front Housing Shield 3 Separate the front housing board from the front housing Locking clips Shield Radio Reassembly Figure 1 6 Separate Main Board From Chassis Front Housing Reassembly 6 Separate the flexible circuit tail by undoing the ZIF connector latch Figure 1 7 1 Place the front housing on a cushioned flat surface with the front facing down 2 Place the keypad into the front housing Figure 1 9 3 Place the board on the keypad in the housing Figure 1 9 Figure 1 7 Separate Flexible Circuit Tail Front Housing Board Removal 1 Place the front housing a
3. and reassemble the GTX GTX LTR LTS 2000 radios Safety Information When testing and repairing the GTX GTX LTR LTS 2000 radios observe the handling precautions to pre vent unnecessary damage to the GTX GTX LTR LTS 2000 radios Minimize handling of static sensitive compo nents and modules Transport and store static sensitive components or assemblies in their original containers on a metal rail Label any package that contains static sensitive components or assemblies Discharge static electricity from the body by wearing a grounded antistatic wrist strap while handling these components Servicing static sensitive components or assemblies should only be done at a static free work station by qualified service technicians Increasing the humidity in the work area minimizes static elec tricity problems Do not allow anything that can generate or hold a static charge on the workstation surface Keep the component leads shorted together whenever possible Pick up components by their bodies Never pick them up by their leads Do not slide the components over any surface Avoid handling components in areas with a floor or work surface covering that can generate a static charge Usea soldering iron connected to earth ground Use only approved anti static vacuum type desoldering tools for removing components When removing printed circuit boards PCBs remove the screws in a diagonal pattern to r
4. edes da dicic eeu 2 1 Intermediate Frequency IF merena da ioy aake III ehe 2 1 ME LEE 2 1 Frequency Generation Unit e e ee 2 4 Controller se asc ux bre eeu ae den DC H I VEI altae Sea aee Ese etit 2 5 l snforlo EE Tr 2 5 Normal OperatiOfi och ck estere er rb ER e ERR odore er dodo Dese 2 5 Clock Synthesizer reet beet b aee etre pede Pat 2 5 Motorola Inc 1997 All Rights Reserved 68P02948C90 O i Table of Contents Bus Operations e e he cues RAM LAS e EL TEE Epiat BE PROM ees che ders ete rt ter s ct Ed SPI Initerface 2 3 rovro A Va BED Control yw ERI UEENE Audio amp Data Circuitry 0 6666 eee eee External PTT Sense MIC Amplifier taeda SEIS ee aa TX Data Circuits 3 2 es ste Dias ess Tere ner i Sub Audible Data PL DPL High Speed Data DTME Dat z v dae RENE RX Audio Processing and Digital Volume Control Audio Power Amplifier Audio PA Muting and Output Protection Receive Data Circuits lees Alert Tone Circuits lessen Heat 0 NISI LV de Ui LS Transmitter Path for Radios wit
5. eniri ees e e ce eg be d aree ee p een a a aree n xvii Repair of FMRC Approved Products 0 6 6 enn xviii oons pe xviii R labeling fessi ees esso sh Meo desk dead ate shad Cog oi eet eri quud trie xix Do Not Substitute Options or Accessories 66 xix Vehicles Equipped with Air Bags yechin ea e Ee aae a e ne xix Section 1 Radio Disassembly Assembly Quum T 1 1 Safety Information a saws acca eed koe Dh eed eg eO aad Xu dade Sedet pe ER PAIR An s 1 1 Radio Disassembly ekt daar statins bee vitant tel totem ge en redd edet ais 1 1 Battery ogee per Eee IE e a eine Een E Patre loce de ere L408 1 1 Chassis Removals ni eee eee dusk e deus ete exec oe e aee edere 1 1 Main Board Removal nA EE EE vd ed ard Rub Meee eae 1 2 Front Housing Board Removal nee ee 1 3 Radio Reassem Dl ye oco eee eR eR erede eed e d reb beet bt 1 3 Front Housing Reassembly eh nnn 1 3 Chassis Reassenmbly 4 c sericis An RIGEN IR Ph Ane LAU RATIO Mein Roe RA en ta eda wees bes 1 4 IRadio Reassembly tss ihesen idee uiae m tetur eerte eade pen tea ane 1 5 Section 2 Theory of Operation OVerVie Wido tui LUN Mc ss Mar MM nico DM LIA hoe tla M rooted o oh tk 2 1 Receiver zu ted nad xd aep rera md esed date etc
6. 2 MHz below the filter Passband The 3 dB bandwidth is approximately 12 22 MHz for 900 MHz respectively centered at 937 MHz for 900 MHz respec tively The center of the band insertion loss is approxi mately 2 dB The 3 pole filters are designed to operate with a 50 Ohm input and output termination The RF amplifier O1 is a Motorola MRF9411 NPN device biased in a common emitter configuration The amp is stabilized by the shunt feedback coil L2 and has approximately 15 dB of gain with a noise figure of about 2 dB The amplifier draws 6 5 mA of current and is supplied by the receiver 5 V supply indicated as SR on the schematics and block diagrams Terminating the RF amplifier is the post selector filter This filter is the same as the pre filter The net gain of the receiver front end module is about 12 dB in the center of the band and about 11 5 dB at the band edges The net center of the band noise figure is approximately 4 5 dB The receiver mixer is a double balanced mixer which provides excellent protection against receiver spurs due to non linearities such as IM and half IF The received signal mixes down to the frequency of the first IF 45 1 MHz and enters the IF circuitry The mixer operates with a LO level of 3 dBm and a conversion loss of about 7 dB February 1997 Intermediate Frequency IF The Intermediate Frequency IF section of the portable radio consists of several sections including the high IF the
7. 4 4 4 5 COE 5 1 Eu eus ria MERC Mee E DE sd 5 2 ied a eno our ina euh LECT 5 2 ardtos4 au bae a PR 5 3 February 1997 GTX GTX LTR LTS 2000 Portable Radios Service Manual Table ontents Section 6 Maintenance Introductio cd ec ee Se REPE OE ete eate Bode hie ies iade a ed ee du cena 6 1 Preventive Maintenance ig odes oue e b vul d she cela ote a ced edel wo Nc etos shag sls lee es d 6 1 licerzesto PT 6 1 Cleaning zcv otn etel o ee oscuro eiua bot eats chin tile A diit 6 1 Cleaning External Plastic Surfaces rssi nnne 6 1 Cleaning Internal Circuit Boards and Components 6 1 Safe Handling of CMOS Devices eee eee 6 1 Repair Procedures and Techniques ee enn eee 6 2 General C Xm 6 2 Parts Replacement and Substitution 0 66 6 een eee es 6 2 Rigid Circuit Boards dg petens oe ee debe aie aed Babe PUER PERS ORES 6 2 Chip COMPONENTS bu eek eru vin sarete geh aha Beat ok 6 2 Over Molded Pad Array Carrier OMPAC 0 6 een 6 2 Shields eor ee etr bao m e due e a Le gt teet ett eu d eels etate 6 3 Section 7 Radio Tuning Procedure Radio Tuning Procedure uc caen Lene eee Ern ea LDS MEM AUC Rene NIE 7 1 General CE 7 1 Tuning Procedure iiss ete cere eS de t eS 7 2 Reference Oscillator Alignment verroin e a EN E e hh 7 2
8. LTR LTS 2000 Portable Radios Service Manual Foreword Service Tools HEAT FOCUS INSIDE DIMENSIONS USED ON MAXIMUM PRESCRIBED HEADS OF HEADS HEAT SETTING 6680334B52 0 572 x 0 572 U701 Refer to Maintenance Section of Manual for prescribed heat setting 6680371B15 0 460 x 0 560 VCO shield SH260 Test Set Service Cable P1 46 3 5 mm plug 12 NOTE 00 7 c 14 Speaker Hi P z 47 Ohm 1 2W E 9 Speaker Lo sleeve 11 2 3 Gnd sleeve 1 0 uF 8 4 Mic Audio OO AN 5 PTT 2 5 mm plug 33K 1 8 W 1 7 P1 DETAIL 8 FRONTSIDE NOTE For proper speaker impedance the RTX4005B test set Audio out switch must be set to the MX position Figure 1 Service Cable RKN4034A for the Test Set RTX4005B February 1997 68P02948C90 O xiii Foreword GTX GTX LTR LTS 2000 Portable Radios Service Manual Radio Model Numbering System Radio Model Numbering System The model number serial number and Motorola FCC designation number are all on a label attached to the back of your radio All GTX GTXLTR LTS 2000 radio models are synthesized 8 channel units that come standard with Tone Private Line TPL Digital Private Line DPL coded squelch or carrier squelch which may be enabled disabled on a per channel basis Programming changes can be made by your local dealer
9. M MOTOROLA GTX GTX LTR LTS 20007 Portable Radios Service Manual 1997 by Motorola Inc Radio Products Group 8000 W Sunrise Ft Lauderdale FL 33322 Printed in U S A 2 97 All Rights Reserved 68P02948C90 O Foreword The information contained in this manual relates to all GTX GTX LTR LTS 2000 radios unless otherwise specified Safety Information Airbag Warning Statement warning VEHICLES EQUIPPED WITH AIR 5 An air bag inflates with great force DO NOT place objects including communication equipment in the area over the air bag or in theair bag deployment area If the communication equipment is improperly installed and the air bag infl ates this could cause serious injury Installation of vehicle communication equipment should be performed by a professional installer technician qualified in the requirements for such installations An air bag s size shape and deployment area can vary by vehicle make model and front compartment configuration e g bench seat vs bucket seats e Contact the vehicle manufacturer s corporate headquarters if necessary for specific air bag information for the vehi cle make model and front compartment configuration involved in your communication equipment installation FCC Safety Information The Federal Communications Commission FCC with its action in General Docket 79 144 March 13 1985 has adopted a safety standard for human exposure to radio frequency
10. Nominal 75V 12 dB SINAD 30 60 C 25 C ref 0 00015 Range 6to9 V Battery Drain Typical Intermodulation 60 dB Emission Standby 68 mA Conducted and Radiat Receive 195 mA ed 47 dBc Transmit 1500 mA Temperature Range Selectivity FM Hum and Noise Operating 30 60 C 12 5 kHz Adjacent Companion Receiver 35 dB Storage 40 85 C Channel 60 dB Dimensions H x W x D Spurious Rejection 60 dB Distortion 5 GTX total height includes 12 86x2 32x1 09 radio antenna adaptor and 325 53 x59 x29 8 mm antenna LTS 2000 total height 12 86x2 32x1 17 includes radio antenna 326 53x59x29 8 mm adapter and antenna Weight w Antenna Freq Stability Modulation Limiting 2 5 kHz GTX less Battery 0 69 Ibs 314 gr 30 60 C 25 C ref 0 00015 GTX Standard Battery 1 20 165 544 gr GTX HNN9701 Battery 1 38 165 625 gr LTS 2000 less Battery 0 68 Ibs 310 gr LTS 2000 Standard Battery 1 19 Ibs 540 gr LTS 2000 HNN9701 Battery 1 37 lbs 621 gr Rated Audio 500 mW Recommended Battery HNN9628 High Capacity NTN7143 Distortion At Rated 5 Audio Channel Spacing 12 5 kHz Operating for Display 20 60 C All specifications subject to change without notice 68P02948C90 O February 1997 GTX GTX LTR LTS 2000 Portable Radios Service Manual Service Aids Foreword Service Aids The following table lists service aids recommended for working on the GTX GTX LTR LTS 2000 MO
11. RF electromagnetic energy emitted by FCC regulated equip ment Motorola subscribes to the same safety standard for the use of its products Proper operation of this radio will result in user exposure substantially below FCC recommended limits DO NOT hold theradio with the antenna very close to or touching exposed parts of the body especially the face ears or eyes whiletransmitting Hold the radio in a vertical position with the microphone two to three inches away from the lips e DO NOT hold the transmit switch on when not actually desiring to transmit e DO NOT allow children to play with any radio equipment containing a transmitter DO NOT operate this equipment near electrical blasting caps or in an explosive atmosphere Under certain condi tions radios can interfere with blasting operations When you arein the vicinity of construction work look for and Observe signs cautioning against radio transmissions If radio transmission is prohibited you must not transmit until out of the area Furthermore you must turn off your radio to prevent any accidental transmission e DO NOT replace or charge batteries in a hazardous atmosphere Contact sparking may occur while installing or removing batteries and cause an explosion Turn theradio off when removing or installing a battery Anyone intending to use a radio in a hazardous area is advised to become familiar with the subject of intrinsic safety and with Section 70 of the
12. Series Position 11 Version Version Letter Alpha Major Change Position 4 Frequency Band Position 10 Feature Level 896 941 MHz Standard Package Position 5 Power Level Position 9 Primary System Type 3W Clear SMARTNET Position 6 Physical Package Position 8 Primary Operation Full Keypad with Display Dual Mode Trunked Position 7 Channel Spacing 12 5 kHz xiv 68P02948C90 O February 1997 GTX GTX LTR LTS 2000 Portable Radios Service Manual Foreword Radio Service Software Information Radio Service Software Information To run the Radio Service Software you will need the following equipment IBM XT AT Convertible or System 2 Model 30 50 with 512K RAM Dual Floppy Disk Drives or one Floppy Disk and one Hard Disk PC DOS or MS DOS 3 0 or later Radio Interface Box RIB RLN4008 RIB to IBM AT cable 30 80369B72 IBM AT cable to IBM XT computer adapter optional RLN4438 Programming Test cable RIB power supply 0180357A57 120 Vac or 0180358A56 220 Vac NED Gl Rwy 0180357A57 120 Vac or 30 80369B72 or 0180358A56 220 Vac 30 80369B71 RIB Power Supply RIB to computer Cable Plugs into 120 or 220 Vac outlet Plugs into RIB and computer Computer f RVN4150A for GTX or LTR RVN4156A for LTS 2000 Software RLN4008 RIB GTX GTX LTR LTS 2000 Radio HKN9857 Programming Test cable Connect
13. X X NAF5039 900 MHz 1 2 Wavelength Whip Battery Pick ups X X HNN9628 1200 mAh High Capacity Battery X X HNN9701 1200 mAh Fully Approved Factory Mutual Battery X X HNN8308 600 mAh Slimline Battery X X HNN9808 600 mAh Fully Approved Factory Mutual Slim Battery Carrying Accessories Pick ups X X HLN9750 Nylon Belt Loop Carry Case for High Capacity Battery X X HLN9421 DTMF Standard Leather Carry Case w Swivel X X HLN9426 DTMF Standard Leather Carry Case w Swivel for Fully Approved FM 1200 mAH X X HLN9427 DTMF Standard Leather Carry Case w Swivel for Fully Approved FM 600 mAH X X HLN9429 DTMF Standard Leather Carry Case w Belt Loop for Fully Approved FM 1200 mAH X X HLN9431 DTMF Standard Leather Carry Case w Belt Loop for Fully Approved FM 600 mAH X X HLN9076 Standard Molded Carry Holder with Belt Clip X X HLN9149 Swivel Belt Loop Adapter for Use w Carry Cases HLN9750 X X HLN9724 Belt Clip X X TDN1002 Swiveller includes holster belt and strap X HLN8255 Spring Belt Clip X X NTN5243 Shoulder Strap for use with all Carry Cases Audio RF Accessories X X HMN9725 Remote Speaker Microphone w Coil Cord and Clip Back X X HMN9727 Earpiece without Volume Control X X HMN9752 Earpiece with Volume Control X HMN9754 2 Piece Surveillance Microphone PTT and Microphone are combined in 1 Piece X X BDN6720 Ear Receiver with GP300 Style Connector X X FLN8660 Audio Accessory Securit
14. any FMRC Approved Product unit could adversely affect the Approval rating of the unit Use of a radio that is not intrinsically safe in a hazardous atmosphere could result WARNING serious injury or death FMRC s Approval Standard Class Number 3605 is subject to change at any time without notice to you so you may want to obtain a current copy of 3605 from FMRC Per the December 1994 publication of 3605 some key definitions and service re quirements are as follows Repair A repair constitutes something done internally to the unit that would bring it back to its original condition Approved by FMRC A repair should be done in an FMRC Approved facility Items not considered as repairs are those in which an action is performed on a unit which does not require the outer casing of the unit to be opened in a manner which exposes the internal electrical circuits of the unit You do not have to be an FMRC Approved Repair Facility to perform these actions The radio support center is at the following address Motorola Radio Support Center 3651 South Central Avenue Rockford Ill 61102 Telephone 800 227 6772 815 489 1000 xviii 68P02948C90 O February 1997 GTX GTX LTR LTS 2000 Portable Radios Service Manual Foreword Vehicles Equipped with Air Bags Relabeling The repair facility shall have a method by which the replacement of FMRC Approval labels are controlled to ensure that any relabeling is limited to units that were originally
15. ep m 7 3 Jransmittet PoWet xo cree e SS e Age ees Da acest d aer do eai ES 7 3 Transmit Deviation Balance Compensation amp Deviation Limit 7 3 Transmit Deviation ooo ue e er a Dk vene e a e HA E a ees dre e EDAD 7 3 Schematic Diagrams Circuit Board Details amp Parts Lists Schematic Diagram for FUF5690A RF Board Wiring Diagram 0 0 eens 2 Schematic Diagram for FUF5690A RF Board Receiver Module 3 Schematic Diagram for FUF5690A RF Board Synthesizer Module 4 Schematic Diagram for FUF5690A RF Board Transmitter Module 5 Schematic Diagram for FUF5690A RF Board Hear 6 Circuit Details and Parts Lists for FUF5690A RF Board 0 eens 7 Parts Lists for FUF5690A RF Board Cont 00 eee HH ences 8 Circuit Board Details Schematic Diagram amp Parts List for FLN8517A Battery Filter Board 9 Circuit Board Details amp Parts List for FLN8836A Logic Board 10 Schematic Diagram for FLN8836A Logic Board 0 nee ene eens 11 GIX GIXLTR Mechanical Parts Elst s eos sree De nce eee oped vee ace dt toe a tne eoe reo Wend UE eh e enden 12 GIX GIX LITR Explod d View Si Piet ee oe ERR ees 13 LTS Mechatiical Parts List et Hee oe AG a Gh peta I de s 14 L TS 2000
16. second LO the second IF and the IF IC chip The first LO signal and the RF signal mix to the IF fre quency of 45 1 MHz and then enters the IF portion of the radio The signal first enters the high IF passes through a crystal filter is amplified by the IF amp and then passed through a second crystal filter The first crystal filter provides selectivity second image protection and intermodulation protection The amplifier provides approximately 16 dB of gain to the signal The signal then passes through the second crystal filter which pro vides further selectivity and second image protection The high IF has an approximate 3 dB bandwidth of 7 KHz The filtered and amplified IF signal is mixed with the second local oscillator at 44 645 MHz The second LO uses an amplifier internal to the IF IC an external crys tal and some external chip parts The oscillator pre sents an approximate level of 15 dBm to the second IF mixer internal to the IF IC The mixed output of the IF signal and the second LO produces a 455 KHz signal second IF This signal is then filtered by external ceramic filters and amplified It is then passed back to the IF IC sent to a phase lock detector and demodulated The resulting detected audio output is then sent to the ASFIC to recover the audio Transmitter The transmitter contains five basic circuits a power amplifier an antenna switch a harmonic filter an antenna matching network and a power
17. shipped from the Manufacturer with an FM Approval label in place FMRC Approval labels shall not be stocked by the repair facility An FMRC Approval label shall be ordered from the original manu facturer as needed to repair a specific unit Replacement labels may be obtained and applied by the repair facility providing satisfactory evidence that the unit being relabeled was originally an FMRC Approved unit Verification may include but is not limited to a unit with a damaged Approval label a unit with a defective housing displaying an Approval label or a customer invoice indicating the serial number of the unit and purchase of an FMRC Approved model Do Not Substitute Options or Accessories The communications equipment package that Motorola submits to FMRC for testing and approval is tested as a system that consists of the communications unit itself and the battery antenna and other options or accessories that make up the rest of the package to be approved This approved package must be strictly observed and there must be no substitution of items even if the substitute you wanted to consider appears as an approved accessory elsewhere in the Guide for some other communications equipment unit Approved configurations are listed by FMRC Approved Product in the annual Approval Guide published by FMRC That guide and the Approval Standard Class Number 3605 document can be ordered from the following address Training Resource Center Publications Order
18. AY KEYBOARD DRIVER SPI BUS pPROCESSOR MONITOR HC11K1 OPT LOCK_DET lt 4 SYNT EN 4 PEND EN 4 SCI gt ROTI ROT2 VOL_SENSE 4 DAC SEL PARALLEL BUS ROM 128K RAM 8K RADIO FUNCTIONAL BLOCK DIAGRAM 2 2 68P02948C90 O February 1997
19. Bxploded View reo star id amistad Meet Wasted bead E E e ette Sakari abe 15 Miscellaneous Parts Lists inesse Hig hts ERR eta ER Oda erbe ie Mew presb d ug 16 Motorola Private Line and Digital Private Line are trademarks of Motorola Inc IBM is a registered trademark and PC DOS PC XT AT Convertible and PS 2 Model 30 50 70 are trademarks of International Business Machine Corporation MS DOS is a trademark of Microsoft Corp February 1997 68P02948C90 O iii Table of Contents GTX GTXTR LT200 ortabl amp adioS ervicM anual This page intentionally left blank iv 68P02948C90 O February 1997 GTX GTX LTR LTS 2000 Portable Radios Service Manual Foreword GTX and GTX LTR Portable Radios Model Chart GTX and GTX LTR Portable Radios Model Chart GTX Portable Radio H11WCD4CB1AN GTX LTR Portable Radio H11WCD4CU1AN FUF1194 900 MHz 1 5 ppm GTX Portable Radio FUF1199 900 MHz 1 5 ppm GTX LTR Portable Radio HNN9628 Battery 7 5 V rechargeable NAF5038 1 2 Wavelength Whip 900 MHz KIT BREAKDOWN FUF1194 900 MHz 1 5 ppm Portable Radio FUF1199 900 MHz 1 5 ppm GTX LTR Portable Radio FLN2436 Front Unit FUF1196 1 5 ppm RF Unit FLN8577 Miscellaneous Parts FLN2436 Front Housing FHN5873 Housing FEN1650 Logic Board amp I O Unit FSN5509 Speaker amp Microphone Assembly FLN8574 Miscellaneous Parts FEN1650 Logic Board amp I O Unit FLN8836 Logic Board FLN8515 I O Hardware FUF1196 1 5 ppm RF Unit FU
20. F5690 1 5 ppm RF Board FLN2394 Chassis Assembly FLN8575 Shield amp Parts FLN2394 Chassis Assembly FLN8517 Battery Filter Board FLN8518 Chassis Hardware Not all kits on this page will be available from the Americas Parts Division February 1997 68P02948C90 O v Foreword GTX GTX LTR LTS 2000 Portable Radios Service Manual LTS 2000 Portable Radio Model Chart LTS 2000 Portable Radio Model Chart LTS 2000 Portable Radio HIOWCH4DC5AN FUF1195 900 MHz 1 5 ppm Portable Radio HNN9628 Battery 7 5 V rechargeable HLN8255 Belt Clip NAF5038 1 2 Wavelength Whip 900 MHz KIT BREAKDOWN FUF1195 900 MHz 1 5 ppm Portable Radio FLN2437 Front Unit FUF1196 1 5 ppm RF Unit FLN8665 Miscellaneous Parts FLN2437 Front Housing FHN5874 Housing FEN1651 Logic Board amp I O Unit FSN5509 Speaker amp Microphone Assembly FLN8576 Miscellaneous Parts FEN1651 Logic Board amp I O Unit FLN8836 Logic Board FLN8515 I O Hardware FUF1196 1 5 ppm RF Unit FUF5690 1 5 ppm RF Board FLN2394 Chassis Assembly FLN8575 Shield amp Parts FLN2394 Chassis Assembly FLN8517 Battery Filter Board FLN8518 Chassis Hardware Not all kits on this page will be available from the Americas Parts Division vi 68P02948C90 O February 1997 GTX GTX LTR LTS 2000 Portable Radios Service Manual Foreword GTX GTX LTR LTS 2000 Options GTX GTX LTR LTS 2000 Options oc 2 x e GTX
21. LICATION R2000 R2400 or Communications This monitor will Frequency deviation meter and signal R2001D with trunking System Analyzer substitute for items with generator for wide range troubleshoot option an asterisk ing and alignment R1049A Digital Multimeter Two meters recommended for AC DC voltage and current measurements 51100A Audio Oscillator 67 to 161 4Hz tones Used with service monitor for injection of PL tones 51053D AC Voltmeter Power 1mVto300V 10 Megohm Audio voltage measurements SKN6009A Cable for meter Test input impedance SKN6001A leads for meter R1053 Dual trace Oscillo 20 MHz bandwidth Waveform measurements Scope 5 mV cm 20 V cm 51350C ST1215B Wattmeter 50 Ohm 5 accuracy Transmitter power output measurements VHF ST1223B UHF Plug in Elements VHF 10 W max 0 1000 MHz T1013A amp UHF RF Dummy 300W Load 1339A RF Millivolt Meter 100 uV to3 VRE 10 KHzto RF level measurements 1 2 GHz R1013A SINAD Meter Receiver sensitivity 513470 or DC Power Supply 0 20 Vdc 0 5 Amps Bench supply for 10Vdc 51348D prog February 1997 68P02948C90 O xi Foreword Service Tools Service Tools GTX GTX LTR LTS 2000 Portable Radios Service Manual The following table lists the tools recommended for working on this family of radios these tools are also available from Motorola Note that the R 1319A workstation requires the use of a specific heat focus head for each of the components on which thi
22. LTR LTS 2000 Options 98 ojlo eol Option Description Factory Mutual FM Batteries X X H236 Fully Approved Factory Mutual Intrinsically Safe Radio includes FA 1200 mAH battery X X H73 Factory Mutual Intrinsically Safe Radio includes 600 mAH battery X X H224 600 mAH Slim Battery deletes standard battery Antenna X X H112 Delete Standard Antenna Miscellaneous X X H415 Bulk Packaging minimum 10 units per line item Chargers X H951 Delete Standard Charger X H437 Rapid Rate Charger 110 V X H438 Slow Rate Charger 220 V X H439 Rapid Rate Charger 220 V February 1997 68P02948C90 O vii Foreword GTX GTX LTR LTS 2000 Portable Radios Service Manual GTX GTX LTR LTS 2000 Accessories GTX GTX LTR LTS 2000 Accessories E GTX GTX LTR LTS 2000 Accessories gt lt a 190 e Accessory Description Charger Pick ups X HTN9803 Single Unit Rapid Charger UK Plug 240 V X X HTN9702 Single Unit Standard Charger 110 V X X HTN9630 Single Unit Rapid Charger 110 V X X HTN9812 Multiple Unit Rapid Charger 220 V X X HTN9719 Vehicular Charger Adapter Bracket 12 V for use with single unit rapid chargers X X HTN9811 Multiple Unit Rapid Charger European Plug 220 V X X HTN9944 Wall Mounting Bracket for Multiple Unit Chargers Antenna Pick ups X X NAF5042 806 941 MHz 1 4 Wavelength Whip
23. National Fire Code which is commonly referred to as Article 500 of the National Electric Code Use of anything but factory supplied components may affect the approval and safety of the radio Likewise it is advised that servicing should be performed only by qualified personnel who adhere to the following Factory Mutual FM required warning A WARNING Modification of FM approved intrinsically safe radios will negate Factory Mutual Research Corporation FMRC approval Manual Revisions Changes which occur after this manual is printed are described in FM Rs These Rs provide complete information on changes including pertinent parts listing data Computer Software Copyrights The Motorola products described in this manual may include copyrighted Motorola computer programs stored in semiconductor memo ries or other media Laws in the United States and other countries preserve for Motorola certain exclusive rights for copyrighted computer programs including the exclusive right to copy or reproduce in any form the copyrighted computer program Accordingly any copy righted Motorola computer programs contained in the Motorola products described in this manual may not be copied or reproduced in any manner without the express written permission of Motorola Furthermore the purchase of Motorola products shall not be deemed to grant either directly or by implication estoppel or otherwise any license under the copyrights patents or paten
24. Processing Dept Factory Mutual Engineering and Research 1151 Boston Providence Turnpike PO Box 9102 Norwood MA 02062 Telephone 617 762 4300 Vehicles Equipped with Air Bags When planning the installation of communication equipment in a vehicle with one or more air bags proceed as follows Vehicles equipped with air bags An air bag inflates with great force DO NOT place objects including communication equipment in the area over the air bag or in the air bag deployment area If the communication equipment is improperly installed and WARNING the air bag inflates this could cause serious injury Installation of vehicle equipment should be performed by a professional installer technician qualified in the requirements for such installations An air bag s size shape and deployment area can vary by vehicle make model and front compartment configuration e g bench seat vs bucket seats e Contact the vehicle manufacturer s corporate headquarters if necessary for specific air bag information for the vehicle make model and front compartment configuration involved in your communication equipment instal lation February 1997 68P02948C90 O xix Foreword GTX GTX LTR LTS 2000 Portable Radios Service Manual This page intentionally left blank 68P02948C90 O February 1997 Section 1 Radio Disassembly Assembly Overview This section explains step by step how to disassemble
25. TOROLA NO DESCRIPTION APPLICATION RLN4008 Radio Interface Box Enables communication between the radio and the computer s serial communications adapter 0180357A57 120 Vac RIB Power Supply Used to supply power to the RIB 0180358A56 220 Vac 30 80369B72 for IBM PC ATs or 30 80369B71 for all other IBM PCs Computer Interface Cable Connects the computer s serial communications adapter to the RIB with 0180303E49 adaptor RLN4438 AT to XT Computer Adapter Allows 30 80369B72 to plug into a XT style communications port HKN9857 Programming Test Cable Connects radio to RIB And can be used as a Battery Eliminator RVN4150B for GTX LTR Radio Service Software Software on 3 1 2 in and 5 1 4 in floppy disc RVN4156B for LTS 2000 RTX4005 Portable Test Set Enables connection to the audio accessory jack Allows switching for radio testing RKN4034 Test Set Cable Connects radio to RTX4005B Test Box FLN8769 Tune and Test Fixture Enables board level maintenance 5880348B33 SMA Female to BNC Female Enables RF connection to radio antenna connector Adapter RLN4460 Test Box Must be ordered Enables connection to the audio accessory jack Allows switching for radio testing assembly Test Equipment The following table lists test equipment required to service the GTX GTX LTR LTS 2000 MOTOROLA NO DESCRIPTION CHARACTERISTICS APP
26. control Refer to the block diagram and the schematic for more infor mation The power amplifier is an LD MOS module This mod ule contains a 3 stage amplification with a supply volt age at 7 5 V The LD MOS is capable of supplying an output power of 4 4 W with an input signal of 1 mW The power output can be varied by changing the bias ing voltage at the first stage 68P02948C90 O 2 1 Theory of Operation GTX GTX LTR LTS 2000 Portable Radios Service Manual Transmitter VOLUME RF amp AUDIO SECTION gt voL CONTROL 935 941MHz 45 1 MHz FRONT END 2ND MIXER amp DET AUDIO ROTARY ROTI gt MODULE P 15 IF 9 DEHOBULSTOR SWITCH amp LEVEL ROT2 ENCODER 889 9 995 9 MHz RX IN LOCK DET 28 PIN M SYNT EN CONNECTOR ANTENNA 16 8 MHz E TO LOGIC SECTION H FILTER gt SWITCH Pa 1 MHz MOD IN REFERENCE OSCILLATOR SPI DATA POWER PWR REF 16 8 MHZ TXB4 CONTROL SPI_CLCK Y TX INJ PRE POWER AMP AMPLIFIER 896 902 MHz pTEMPUS_DIA PWR_REF RX_AUDIO een RED SCB3 YELLOW D A DAC_SEL HEAR CLEAR C M _ VIC EN INT MIC LOGIC SECTION 8 DIGIT SERIAL SEN LCD DISPLAY EEPROM 4K ASFIC 28 PIN CONNECTOR FROM RF SECTION DISPL
27. educe stress on the boards February 1997 Radio Disassembly Battery Removal 1 Thebattery latch is located at the bottom of the radio Figure 1 1 Press and hold the battery latch towards the front of the radio Figure 1 1 Press Battery Latch 2 Press the battery housing against the radio while sliding the battery housing down until it is free of the chassis rails Figure 1 2 Battery housing Figure 1 2 Slide Battery Housing 3 To remove the battery pull it straight out and away from the radio Chassis Removal 1 Pullthe control knobs straight off 68P02948C90 O 1 1 Radio Disassembly Assembly GTX GTX LTRLTS 2000 Portable Radios Service Manual Radio Disassembly 2 Unscrew the antenna counter clockwise until 6 Pull the chassis out and away from the it is detached from the radio housing as shown by the arrow Figure 1 4 and beware of the front cover flexible circuit 3 Carefully pry the chassis up on both sides near the bottom with a flat blade screwdriver 7 Figure 1 3 Remove the flexible circuit using a flat blade screwdriver or manually unlatching the ZIF connector Figure 1 5 Figure 1 3 Remove Chassis Figure 1 5 Unlatching Zif Connector 4 Liftthe chassis approximately halfway out Main Board Removal IMPORTANT You must disconnect the ribbon cable before completely removing the chassis The front shield holds the main board onto the chassis To remove the front shield
28. h Hear Clear Receiver Path for Radios with Hear Clear U550 Data Signal Routing Section 3 Accessory OVERVIEW veste pee neo eei Dd ENDE Description Operation svn cece seca omoes eed eie a mte m eed RE E Yes Handling Precautions Maintenance oesie seeren e eh hrs Section 4 Troubleshooting OVeEVIeW eua VON ART aee UN Te eae AP eec Troubleshooting Charts 0 0 0 6 cece eens Troubleshooting Flow Chart for Troubleshooting Flow Chart for Transmitter Troubleshooting Flow Chart for Synthesizer Troubleshooting Flow Chart for Controller Section 5 Radio Diagnostic Utilities Lest Mod Entty iiio res eeu eR IRE TENE Test Mode ChannelSelection Test Mode Tx Modulation Fail Mode o voL Rete eee Exiting Test Modes serei tyon iota sepa eRe E o E IERE E Performance Checks 0 0 0 ccc nent eee ene ii 68P02948C90 O GTX GTXTR LT200 ortabl amp adioS ervicM anual SHEER da c eredi dente 3 1 Cette utate n eie rtt tr t d 3 1 Pona edo deep EUR ARI 3 1 vinis d kdo tung 3 1 iade ini Bhd E ERAT Ded e d 3 2 Vien Aa e Vaca eese a CR eV dh 4 1 EET tne gs te 4 1 de Eu asse ind 4 2 AN ERU ERR EAE RM 4 3 DAS ERE Me Ade cd une ade decl
29. he unit Radios must ship from the Motorola manufacturing facility with the hazardous atmosphere capability and FM Approval label ing Radios will not be upgraded to this capability and labeled in the field February 1997 68P02948C90 O xvii Foreword GTX GTX LTR LTS 2000 Portable Radios Service Manual ImportantS afety Information Intrinsically Safe Radios A modification changes the unit s hardware from its original design configuration Modifications can only be done by the orig inal product manufacturer at one of its FMRC audited manufacturing facilities Failure to use an FMRC Approved Product unit with an FMRC Approved battery or FMRC Approved accessories specifically approved for that product may result in the dangerously unsafe condition of an unapproved radio combination being used in a hazardous location WARNING Unauthorized or incorrect modification of an FMRC Approved Product unit will negate the Approval rating of the product Repair of FMRC Approved Products REPAIRS FOR MOTOROLA FMRC APPROVED PRODUCTS ARE THE RESPONSIBILITY OF THE USER You should not repair or relabel any Motorola manufactured communication equipment bearing the FMRC Approval label FMRC Approved Product unless you are familiar with the current FMRC Approval Standard for repair service Class Num ber 3605 You may want to consider using a repair facility that operates under 3605 repair service approval Incorrect repair or relabeling of
30. microphone speaker ribbon cable 4 While pressing chassis toward the housing top press the bottom end down into the housing until the bottom housing wall snaps over the chassis retaining studs Make certain that the flexible circuit is completely inside the housing Figure 1 16 Insert Chassis into Housing NOTE The chassis should snap firmly into place and the flexible circuit should be placed nicely inside the radio 5 Replace the knobs antenna and battery 68P02948C90 O 1 5 Radio Disassembly Assembly GTX GTX LTR LTS 2000 Portable Radios Service Manual This page intentionally left blank 68P02948C90 O February 1997 Section 2 Theory of Operation Overview This section provides a detailed theory of operation for the GTX GTX LTR LTS 2000 radios and its compo nents the receiver transmitter frequency generation circuitry controller and audio amp data circuitry Receiver The receiver of the GTX GTX LTR LTS 2000 radios consists of 4 major blocks the front end module dou ble balanced mixer 45 1 MHz IF and back end IF IC The GTX GTX LTR LTS 2000 front end modules con sist of three blocks of circuitry a ceramic pre selector filter RF amplifier and ceramic post selector filter The ceramic pre and post selector filters are 3 pole bandpass filters This topology maximizes the attenua tion at the worst case image frequency for this receiver which is 90
31. s a guide Figure 1 12 4 Place front shield on main board using tabs as a guide Figure 1 12 5 Press down on front shield until chassis main board and front shield are seated tightly Figure 1 14 Replace Gasket together 1 4 68P02948C90 O February 1997 GTX GTX LTRILTS 2000 Portable Radios Service Manual 8 Place the chassis assembly and front housing assembly on a flat surface with the top face of housing in a reverse and opposite direction Figure 1 15 Figure 1 15 Place Chassis Opposite of Front Housing Radio Reassembly 1 Insert the flexible circuit tail from chassis to ZIF connector on front housing board Lock the tail in the ZIF connector by pressing down the latch NOTE Flexible circuit tail must be fully inserted to prevent short circuiting NOTE The gasket helps keep the radio free from unwanted dirt dust and water We rec ommend using a new lubricated gasket part no 3286063C01 when reassem bling the radio Using an old gasket could impair the overall seal quality of the radio 2 Insert assembled chassis main board and front shield into radio housing at approximately a 45 degree angle Figure 1 16 Exercise caution while inserting the volume February 1997 RBdiassembly Assembly Radio Reassembly and frequency controls through the housing top IMPORTANT The main board must be inserted into chassis Step 3 before you can secure chassis into radio housing 3 Connect
32. s between the RIB and radio Power Supply 7 5 Vdc Note Battery can be used on programming cable making power supply optional Figure 2 Equipment Setup February 1997 68P02948C90 O xv Foreword GTX GTX LTR LTS 2000 Portable Radios Service Manual Configuring the RIB and Radio Configuring the RIB and Radio 1 Connect the RIB to the computer Figure 2 Plug the large 25 pin end of the HKN9857 programming cable into the RIB The other end of this cable has a battery eliminator 3 Slide the battery eliminator in place of the radio s battery 4 Plug power supply 0180357A57 120 Vac or 0180358A56 220 Vac into a wall outlet and connect the other end to the RIB 5 Connect the radio to a power supply and turn the volume control clockwise to turn it on xvi 68P02948C90 O February 1997 GTX GTX LTR LTS 2000 Portable Radios Service Manual Foreword Important S afety Information Intrinsically S afe R adios Important Safety Information Intrinsically Safe Radios FMRC Approved Equipment Anyone intending to use a radio in a location where hazardous concentrations of flammable material exist hazardous atmo sphere is advised to become familiar with the subject of intrinsic safety and with the National Electric Code NFPA 70 National Fire Protection Association Article 500 hazardous classified locations An Approval Guide issued by Factory Mutual Research Corporation FMRC lists manufacturers and the products appro
33. s item is used Each of these heat focus heads must be ordered separately The individual heat focus heads and the components on which they are used are listed at the top of the next page MOTOROLA NO DESCRIPTION APPLICATION 6680387A59 Extractor 2 contact Removal of discrete surface mounted devices 6680387 64 Heat controller with safety stand or 6680387 Safety stand only 0180381B45 110 Vac or MBT250 Surface mount thru hole repair Temperature controlled self contained solder 0180300E06 220 Vac station ing desoldering repair station for installation and removal of surface mounted devices 8180369E97 Flux holder applicator arrays for repair Allows for the proper amount of flux to be applied to pad grid 1105139W02 30cc plastic syringe and flux paste For use with flux holder applicator 8180369E97 0180386A81 Miniature digital readout soldering station incl 1 64 micropoint tip 0180386A78 Illuminated magnifying glass with lens at tachment 0180386A82 Anti static grounding kit Used during all radio assembly and disassem bly procedures 6684253C72 Straight prober 6680384498 Brush 1010041A86 Solder RMA type 63 37 0 020 diameter 1 Ib spool 1080370B43 RMA liquid flux R 1319A Shields and surface mounted component Removal of surface mounted integrated cir IC removal rework station order all heat cuits focus heads separately xii 68P02948C90 O February 1997 GTX GTX
34. ssembly with the front facing down on a padded flat surface This is to avoid the lens from being scratched 2 Remove the front housing shield using tweezers or sharp end screwdriver by undoing the four side catches Figure 1 8 Figure 1 9 Place Keypad Into Front Housing February 1997 68P02948C90 O 1 3 Radio Disassembly Assembly GTX GTX LTRLTS 2000 Portable Radios Service Manual Radio Reassembly 4 Fold the LCD flexible circuit Figure 1 11 Make sure the LCD flexible circuit is outside 5 Place the front housing shield into the front housing using the four slots on the front housing wall as the guide Figure 1 10 Figure 1 10 Place Front Housing Shield Into Front Housing 6 Press down the shield at the four tabs until Figure 1 12 Align Pins tabs lock into the front housing catches 7 Slidein the lightpipe Figure 1 11 6 Hooklocking clips first to the chassis tab then LCD flexible push clips over on shield with thumb until circuit c clips lock into front shield holes Figure 1 13 a gt Figure 1 11 Slide In The Lightpipe Figure 1 13 Reinsert Locking Clips Chassis Reassembly 1 Place chassis on a flat surface with the battery 7 Replace chassis gasket Figure 1 14 rails downward 2 Insertthe flexible circuit tail end marked RF into the ZIF connector on the RF board and lock the connector by engaging the latch Figure 1 12 3 Insert main board into chassis using alignment pins a
35. t applications of Motor ola except for the normal non exclusive royalty free license to use that arises by operation of law in the sale of a product AR MOTOROLA Table of Contents FOreWoOId ee niena Au bebe e pem RU a AE aede eter et p ders Inside front cover GTX and GTX LTR Portable Radios Model en LTS 2000 Portable Radio Model vi GTX GTX LTR LTS 2000 Options ec le e ea ande bd ee e eph aee ave es vii GIX GLX IETR LTS 2000 Accessories lo DAS d EXER viii Performance Specifications LTR LTS 2000 seessseeeeeee n x Service AIMS P O 1 Test Equipments oue usa nace hen tt i ed t ue ctu d xi Service Tools rei sagr oe bem e mh rh mee d hangar aree eos eer Dd aee e dere ru d ps cue d a ob xii Testoet Service Cable cresie etse ai aid ates ache lata dri dares Eo Rer tds xiii Radio Model Numbering Systeri rires ienei tim eeii eee ehe xiv Radio Service Software Information 0 6 0 06 een Configuring the RIB and een eee xvi Important Safety Information Intrinsically Safe Radios 0000000 xvii FMRC Approved Equipment
36. ved by FMRC for use in such locations FMRC has also issued a voluntary approval standard for repair service Class Number 3605 FMRC Approval labels are attached to the radio to identify the unit as being FM Approved for specified hazardous atmospheres This label specifies the hazardous Class Division Group along with the part number of the battery that must be used Their Ap proval mark is shown below APPROVED MPEP Pease Do not operate radio communications equipment in a hazardous atmosphere unless it is a type especially qualified e g FMRC Approved for such use An explosion or fire may result Do not operate the FMRC Approved Product in a hazardous atmosphere if it has WARNING been physically damaged e g cracked housing An explosion or fire may result Do not replace or charge batteries in a hazardous atmosphere Contact sparking may occur while installing or removing batteries and cause an explosion or fire Do not replace or change accessories in a hazardous atmosphere Contact sparking may occur while installing or removing accessories and cause an explosion or fire Do not operate the FMRC Approved Product unit in a hazardous location with the accessory contacts exposed Keep the connector cover in place when accessories are not used Turn radio off before removing or installing a battery or accessory Do not disassemble the FMRC Approved Product unit in any way that exposes the internal electrical circuits of t
37. y Clamp These batteries are only compatible with portables ordered from the factory with the Factory Mutual option viii 68P02948C90 O February 1997 GTX GTX LTR LTS 2000 Portable Radios Service Manual Foreword GTX GTX LTR LTS 2000 Accessories oc x GTX GTX LTR LTS 2000 Accessories cont 58 o Z 190 eo Documentation Kits X 68P02946C80 A GTX Portable Radio User s Guide X 68P02948C65 O GTX LTR Portable Radio User s Guide X 68P02948C90 O GTX GTX LTR LCS 2000 Portable Radios Service Manual Radio Service Software RSS X RVN4150B RSS Package for GTX and GTX LTR Radio Programming X RVN4156B RSS Package for LCS LTS 2000 Radio Programming X X 68P02946C20 A LCS LTS 2000 RSS User s Guide X X 68P02948C70 O GTX GTX LTR RSS User s Guide X X HKN9857 Programming Test Cable See RSS information for hardware details February 1997 Prices and availability subject to change without notice 68P02948C90 O ix Foreword Performance Specifications GTX GTX LTR LTS 2000 Performance Specifications GTX GTX LTR LTS 2000 GTX GTX LTR LTS 2000 Portable Radios Service Manual GENERAL RECEIVER TRANSMITTER FCC Designation AZA89FT5781 Frequency Range 935 941 MHz RF Power 25W Power Supply NiCad Battery Bandwidth 6 MHz Frequency range 896 902 MHz 935 941 MHz Battery Voltage Usable Sensitivity 0 35 uV max Freq Stability
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