Motorola GP2000 Service Manual Download Page 89

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Troubleshooting charts

Section 7 -27

6.0

Troubleshooting charts

Start

Very low or no 12

dB SINAD

Noise at spkr

when radio is

unsquÕd?

Is 1st LO at
TP302 >0

dBm?

Inject on channel
signal at RF port,

L706 pin 6

Is 12 dB SINAD

-110 dBm?

Inject 45.1

MHz signal at

Is 12 dBS -117

dBm?

Inject a 45.1
MHz signal at

C501

Is 12 dBS -110

dBm?

Check IFIC

Q506 (see

below)

Noise at pin 9
of IFIC Q506?

Check

VCO/Synth

Inject on

channel signal

at C407

Check
harmonic
filter and

antenna path

Check external

components

connected to IFIC. If

OK, replace Q506

Check mixer,

Q407

Is Q506 biased

correctly?

Check XTAL

filter X501

Check +5vRX

and IF amp

components

Is 12 dBS -116

dBm?

Check Q702

Is Q404 biased

properly?

Check 2-pole and

RF BPF
components

Check +5vRX and
Q404 bias circuitry

Is 2nd LO on

freq?

Check VDC of

all IFIC pins

Are VDC of
pin 4 and
10 of IFIC

OK?

Are voltages on

pins OK?

Check 2nd LO

XTAL and

components

Check IFIC
(see below)

Check external

components

connected to IFIC

YES

R459 Terminal

Troubleshooting Flow Chart for

Receiver

Summary of Contents for GP2000

Page 1: ...June 2001 GP2000 Portable Radios Service Manual 6804112J41 O ...

Page 2: ... copyrighted computer program Accordingly any copyrighted 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 prod ucts shall not be deemed to grant either directly or by implication estoppel or otherwise any license under the copy...

Page 3: ... of the United States Report 86 1986 International Commission on Non Ionizing Radiation Protection ICNIRP 1998 Ministry of Health Canada Safety Code 6 Limits of Human Exposure to Radiofrequency Electromagnetic Fields in the Frequency Range from 3 kHz to 300 GHz 1999 Australian Communications Authority Radiocommunications Electromagnetic Radiation Human Exposure Standard 1999 applicable to wireless...

Page 4: ... Industry Manufacturers Association recommends that a minimum separation of 6 inches 15 centimeters be maintained between a handheld wireless radio and a pacemaker These recommendations are consistent with those of the U S Food and Drug Administration Persons with pacemakers should ALWAYS keep the radio more than six inches 15 centimeters from their pacemaker when the radio is turned ON not carry ...

Page 5: ...osion or Þre resulting in bodily injury or even death Blasting Caps And Areas To avoid possible interference with blasting operations turn off your radio when you are near electrical blasting caps in a blasting area or in areas posted ÒTurn off two way radio Ó Obey all signs and instructions OPERATIONAL CAUTIONS Antennas Do not use any portable radio that has a damaged antenna If a damaged antenna...

Page 6: ...vi SAFETY INFORMATION ...

Page 7: ...dio Ñ General 2 4 6 0 Radio Disassembly Ñ Detailed 2 5 6 1 Front Cover from Chassis Disassembly 2 5 6 2 Control Board Disassembly 2 7 6 3 RF Board Disassembly 2 7 7 0 Radio Reassembly Ñ Detailed 2 8 7 1 RF Board Reassembly 2 8 7 2 Control Board Reassembly 2 8 7 3 Chassis and Front Cover Reassembly 2 8 8 0 Mechanical View and Parts List 2 11 8 1 Exploded View and Parts List 2 11 9 0 Service Aids 2 ...

Page 8: ...meters 4 14 4 8 PL Frequencies and Codes 4 18 4 9 DPL Codes 4 19 4 10 Examples 4 20 4 11 Factory Reset 4 22 Section 5 Error Code Displays 1 0 Error Codes 5 1 Section 6 ACCESSORIES 1 0 Antennas 6 1 2 0 Carrying Accessories 6 1 3 0 Carry Cases 6 1 4 0 Chargers 6 2 5 0 Batteries 6 2 6 0 Audio Accessories 6 2 7 0 Manuals 6 2 8 0 Service Kits 6 3 Section 7 VHF Band Information 136 174 Mhz 1 0 Model Cha...

Page 9: ...ard Bottom Side 7 15 Complete Controller Board Schematic Diagram 7 16 VHF 136 174 MHz RF Board Schematic Diagram 7 17 VHF 136 174 MHz Radio Parts List Controller Board 7 18 6 0 Troubleshooting charts 7 27 Troubleshooting Flow Chart for Receiver 7 27 Troubleshooting Flow Chart for Transmitter 7 28 Troubleshooting Flow Chart for Synthesizer 7 29 Troubleshooting Flow Chart for Microcontroller 7 30 Tr...

Page 10: ...x ...

Page 11: ... are for guidance purposes only In instances where the product is covered under a return for replacement or return for repair warranty a check of the product should be performed prior to shipping the unit back to Motorola This is to ensure that the product has been correctly programmed or has not been subjected to damage outside the terms of the warranty Prior to shipping any radio back to the app...

Page 12: ...identiÞcation number All part orders should be directed to your local AAD ofÞce Please refer to your latest price pages 2 4 Technical Support Technical support is available to assist the dealer distributor in resolving any malfunction which may be encountered Initial contact should be by telephone wherever possible When contacting Motorola Technical Support be prepared to provide the product model...

Page 13: ...ows one portable radio model number and its speciÞc characteristics Table 1 1 Radio Model Number Example AZH49KBH6AA9 Type of Unit Model Series Freq Band Power Level Physical Packages Channel Spacing Protocol Feature Level AZ H 49 K 136 174 MHz B 1W F Limited Keypad with Display 4 12 5K AA Conventional 6 GP2100 N 216 257 MHz C 4W H Full Keypad with Display 6 20 25K 9 GP2000 Q 403 440 MHz D 5W 8 12...

Page 14: ...1 4 This page is intentionally left blank ...

Page 15: ...using assembly and battery case These surfaces should be cleaned whenever a periodic visual inspection reveals the presence of smudges grease and or grime The only recommended agent for cleaning the external radio surfaces is a 0 5 solution of a mild dishwashing detergent in water The only factory recommended liquid for cleaning the printed circuit boards and their components is isopropyl alcohol ...

Page 16: ...ean container to prevent contamination by dissolved material from previous usage CAUTION This radio contains static sensitive devices Do not open the radio unless you are properly grounded Take the following precautions when working on this unit Store and transport all CMOS devices in conductive material so that all exposed leads are shorted together Do not insert CMOS devices into conventional pl...

Page 17: ...rcuit can damage the material Therefore avoid excessive heat and excessive bending For parts replacement use the ST 1087 Temperature Controlled Solder Station with a 600 700 degree F tip and use small diameter solder such as ST 633 The smaller size solder will melt faster and require less heat to be applied to the circuit To replace a component on a ßexible circuit 1 Grasp with seizers hemostats t...

Page 18: ...ld by turning on the vacuum pump Lower the focus head until it is approximately 1 8Ó 0 3cm above the shield Turn on the heater and wait until the shield lifts off the circuit board Once the shield is off turn off the heat grab the part with a pair of tweezers and turn off the vacuum pump Remove the circuit board from the R 1070Õs circuit board holder To replace the shield add solder to the shield ...

Page 19: ...e battery down and away from radio 3 Remove the antenna 4 Pull the On Off Volume knob off of its shaft 5 Remove the two screws at the back of the rear chassis see ÒFigure 2 2Ó 6 Insert a small ßat head screw driverÊat the bottom of the radio between the chassis and housingÊ location marked in Figure 2 2 and lift the chassis gently Be careful not to damage Figure 2 1 Figure 2 2 Insert screwdriver h...

Page 20: ...from the front cover see ÒFigure 2 3Ó Be careful not to damage the speaker wire underneath 8 Slide the rear chassis downwards and away from the front cover 9 Remove the speaker connector which connects between RF Board and the internal speaker on front cover see ÒFigure 2 4Ó Figure 2 3 Figure 2 4 ...

Page 21: ... through a board to board connector see ÒFigure 2 5Ó 6 3 RF Board Disassembly 1 Remove the screws and the stud which hold the RF board to the rear diecast with the Phillips head screw driver and socket wrench respectively 2 Gently remove the RF board from rear diecast The completely disassembly radio is shown in ÒFigure 2 6Ó Figure 2 5 Figure 2 6 Completely Disassembled Radio board to board connec...

Page 22: ... board by pressing it Þrmly downwards at the board to board connector see ÒFigure 2 7Ó 3 Tighten the screws using screwdriver to hold the control board in place 7 3 Chassis and Front Cover Reassembly 1 Connect the RF board to the internal speaker on front cover with the speaker connector see ÒFigure 2 8Ó 2 Place the front cover over the tabs on the rear diecast 3 Insert the On Off Volume shaft int...

Page 23: ...er the front cover until the bottom edges snap Þrmly into place on the rear diecast see ÒFigure 2 9Ó 5 Tighten the two 2 screws at the bottom of rear diecast using a screwdriver see ÒFigure 2 10Ó 6 Attach the battery Figure 2 9 Figure 2 10 ...

Page 24: ...2 10 Radio Reassembly Ñ Detailed 7 Attach the On Off Volume Knob and Antenna Figure 2 11 Completely Reassembled radio ...

Page 25: ... Parts List 8 1 Exploded View and Parts List Figure 2 12 Alpha Series Radio Exploded View 1 1 3a 3a 4a 4a 5 5 6 6 9 9 13 13 11 11 12 12 15 15 16 16 2d 2d 2f 2f 2e 2e 2g 2g 2c 2c 2b 2b 2a 2a 8a 8a 8b 8b 8c 8c 7d 7d 7c 7c 7b 7b 7a 7a 3b 3b 4b 4b 10 10 14 14 17 17 ...

Page 26: ...DS1M001130 Knob Assembly 3a Knob 3b Spring D4 75 4 DS1M001140 External Cover Kit 4a External Cover 4b External Cover Cap 5 DS1M001150 Controller Board Assembly 6 DS1M001160 RF Board Assembly 7 DS1M001170 LCD Kit 7a LCD Bracket 7b LCD 7c Interconnector 7d Reßector 8 DS1M001180 Label Kit 8a Label Nameplate 8b Label Serial 8c Label Tuning 9 DS1M001190 Speaker Assembly 10 PMNN4046 Battery 11 DSM219200...

Page 27: ...ew and Parts List 2 13 13 DSM2192006 Volume Gasket 14 HLN9844 Beltclip 15 DSM5190001 Back Housing 16 DSM6189003 PTT Button 17 Frequency dependant Please see Anten nas on page 6 1 Antenna Item Part Number Description ...

Page 28: ...able 2 5mm Connects radio and IF Test Box to Computer PMKN4003A Cloning Cable 2 5mm To clone programmable information from one radio to another radio DSK001C704 Test Cable Connects radio to IF Test Box DSK001C714 Interconnect Service Cable Connects RF board and CPU board DSK001C702 IF Test Box Enables connection to the audio accessory jack Allows switching for radio testing DSK001C705 Battery Elim...

Page 29: ...s S1100 Audio Oscillator 67 to 200Hz tones Used with service monitor for injection of PL tones S1053 SKN6009 SKN6001 AC Voltmeter Power Cable for meter Test leads for meter 1 mV to 300 V 10 Mega Ohm input impedance Audio voltage measure ments R1053 Dual trace Oscillo scope 20 MHz bandwidth 5 mV cm 20 V cm Waveform measurements S1350 ST1215 VHF ST1223 UHF T1013 Wattmeter Plug in Elements VHF UHF RF...

Page 30: ...2 16 Programming Cable DSK001C706 11 0 Programming Cable DSK001C706 Figure 2 13 Programming Cable Schematic Figure 2 14 Pin ConÞguration of the Side Connector 5 4 3 2 1 9 8 7 6 ...

Page 31: ...IF Test Box DSK001C702 2 17 12 0 IF Test Box DSK001C702 Figure 2 15 IF Test Box Schematic ...

Page 32: ...2 18 This page is intentionally left blank ...

Page 33: ...in each kit 2 0 Software Tuning Setup A Windows 95 98 NT PC personal computer and Tuner are required to tune parameters such as power sensitivity squelch and RSSI To perform the tuning procedures the radio must be connected to the PC and IF Test Set as shown in Þgure below Refer to online help Þles for the tuning procedures Description Kit Number Tuner Installation Kit Disk PMVN4060_ Tuner Install...

Page 34: ...following conÞgurations Audio bandwidth 0 25Hz to 15 000Hz De emphasis OFF 3 Inject a 60mV 1kHz tone to the radio through the extenal mic connector 4 Key up the radio 5 Using the ceramic tuning tool adjust RV601 to tune the audio modulation deviation to settle between 4 3kHz to 4 5kHz 3 2 Sub Audio Modulation Tuning 1 Set the radio to transmit at 155 025MHz with low power and Tx PL frequency of 10...

Page 35: ...indows 95 98 NT environment An Installation instruction manual is contained within each kit 2 0 CPS Programming Setup Refer to online help Þles for the CPS Programming procedures Description Kit Number Alpha Series Radio CPS Installation Kit Disk PMVN4059_ Alpha Series Radio CPS Installation Kit CD PMVN4061_ Figure 4 1 CPS Programming Setup Radio Programming Cable 2 5mm DSK001C706 ...

Page 36: ...rdware tuning and alignment parameters Unit Serial Number 3 5 To Clone a Radio Cloning duplicates the contents of your radio master radio into your customerÕs radio slave radio Tuning and alignment information are not affected by cloning 1 Turn off both the master and slave radios if any of them are turned on 2 Connect both radios with the cloning cable through the Programming Port lower port of t...

Page 37: ...een Dealer and User ConÞgurations From Dealer to User 1 Turn off the radio 2 Press PTT the Monitor button and the button together and turn on the radio 3 LCD displays PROTECT 4 To conÞrm switching to User ConÞguration press PTT To cancel press any other button 5 Turn off the radio The radio now operates in User ConÞguration From User to Dealer 1 Turn off the radio 2 Press PTT the Monitor button an...

Page 38: ...n off the radio 4 4 Accessing Programming Mode Parameters In Dealer ConÞguration Programming Mode parameters are grouped into three main categories RW Radio Wide Channel 001 to XXX1 and VFO Variable Frequency Operation Use or buttons to move from one category to another RW ßà CH 001 ßà CH 002 ßà É ßà CH XXX1 ßà VFO NOTE Radio operating in User ConÞguration is only restricted to RW parameters Once ...

Page 39: ... is near or your radio is receiving interference Press or to select the desired squelch level Squelch Level Scan List 1 2 3 Special PL 1 2 3 Rx Tx DPL Setting Time Out Timer PL DPL Code Type Scan Interval Time Scan Hang Time RW Radio Wide CH 001 Channel On Off Rx Frequency Tx Frequency Rx PL DPL Tx PL DPL Scan Type Scan List Copy Channel CH 002 CH XXX Scan Upper Limit Scan Lower Limit Frequency St...

Page 40: ...annel number from the scan list press Refer to 4 10 3 Setting Up a Scan List on page 21 for details SCANLST2 Scan List 2 2 01 XXX É 2 16 XXX See Above SCANLST3 Scan List 3 3 01 XXX É 3 16 XXX See Above PL1 XXX X Special PL Frequency 1 PL1 067 0 PL1 067 1 É PL1 254 9 PL1 255 0 You may program any PL frequency from 067 0 Hz to 255 0 Hz with 0 1 Hz resolution This PL can then be used as receive and o...

Page 41: ... off the receiver for a longer duration Select this if you want to maximize battery saving and do not expect to receive any Selective Call Press or to select the desired battery saver set ting BT XXXX Battery Type BT NIMH BT NICD BT ALK BT NIMH Select the type of battery that your radio is using NIMH Nickel Metal Hydride NICD Nickel Cad mium or ALK Alkaline Press or to select the desired battery t...

Page 42: ... PTT ID Short Sidetone SST OFF SST ON SST OFF When PTT ID short sidetone is enabled ON an alert tone is heard after PTT ID is sent It indicates that the user is ready to start talking Press or to select ON or OFF PTM XXXX Tx Pretime PTM 0000 PTM 0025 É PTM 4000 PTM 0050 Pretime is the duration from which PTT is pressed to the time when PTT ID is ready to be sent Adjust the pretime to suit the repe...

Page 43: ... which matches its ALL ID the radio is said to have received an All Call Press or to move the cursor to the appropriate character Use the keypad to enter the ID Enter 8 times to erase ID Refer to 4 10 4 Programming an ID on page 21 for details ACK ID Acknowledge ment ID 8 charac ters consist of 1 2 É 9 0 A B C D and Blank ACK ID is sent when the radio receives an Individ ual Call and Acknowledgeme...

Page 44: ... Access Code is dialed when you want to access the landline telephone network Once it is programmed it can be sent by pressing PTT followed by and then Pause can be entered by pressing followed by Enter 16 times to completely erase entered code Refer to 4 10 5 Programming an Phone Number Access Code De access Code on page 22 for details DA CODE De access Code 16 charac ters consist of 1 2 É 9 0 A ...

Page 45: ...rola code number format see 4 8 PL Frequencies and Codes on page 18 and 4 9 DPL Codes on page 19 Press or to select CODE or FREQ SIT XXXX Scan Interval Time SIT 0250 SIT 0500 ÉÉ SIT 5000 SIT 0500 Scan Interval Time is the duration the radio will spend on the landed channel before switching to scan the Priority Channel in Priority Scanning Unit is in ms Scan Interval Time is therefore pro grammable...

Page 46: ...PL3 OR When PL CODE is selected in RW 000 001 É 126 PL1 PL2 PL3 RPL OFF This is the PL or DPL code that the channel will use to unsquelch the receive message Two display formats are available FREQ and CODE selectable in RW OFF or 000 indicates that no PL DPL is used for receive i e radio operates in carrier squelch mode Press or to select the desired PL DPL TPL XXXX Channel Transmit PL DPL When PL...

Page 47: ...llows the channel number to be displayed as alias Press or to move to the character that needs to be edited Enter the character using the keypad Refer to 4 10 2 Entering a Channel Alias on page 20 for details CS Ð XX X Channel Spac ing CS Ð 12 5 CS Ð 25 0 CS Ð 25 0 Select the channel spacing for the channel Press or to select the desired channel spacing SC XXX Selective Call Selcall SC OFF SC ON S...

Page 48: ...hen enter the channel number using the keypad Refer to 4 10 1 Copying All Parameters from One Channel to Other Channel s on page 20 for details Channel Parameter Description Range Default from Factory Remarks UXXX XXXX VFO Scan Upper Limit Within the band limits of your model U174 0000 This is the upper most frequency that VFO will scan You are not allowed to enter out of bound frequen cies Use th...

Page 49: ... repeater offset is set to OFS POS this offset frequency will be added to the VFO Rx frequency to transmit messages When repeater offset is set to OFS NEG this offset frequency will be deducted from the VFO Rx fre quency to transmit messages Unit is in 100kHz Repeater offset frequency there fore ranges from 0kHz to 10MHz in the increment of 100kHz Press or to select the desired repeater offset fre...

Page 50: ...s selected in RW OFF 067 0 É 254 1 023 D 025 D É 754 D PL1 PL2 PL3 OR When PL CODE is selected in RW 000 001 É 126 PL1 PL2 PL3 TPL OFF This is the PL or DPL code that the VFO will use to transmit the message Two display formats are available FREQ and CODE selectable in RW OFF or 000 indicates that no PL DPL is used for transmit Press or to select the desired PL DPL TOC XXX Turn Off Code Reverse Bu...

Page 51: ... be enabled or disabled If enabled the VFO would adopt Signaling Squelch Mode i e unsquelch only if radio is receiving carrier AND Selcall matching ID Press or to select the desired Selcall setting ACK XXX Acknowledge ment Enabled for Individual Call ACK OFF ACK ON ACK OFF Select if Acknowledgement is to be sent upon receiving an Individual Call If enabled the preprogrammed Ack ID will be replied ...

Page 52: ...A 151 4 025 5Z 77 005 XB 156 7 026 5A 79 7 006 WB 162 2 027 5B 82 5 007 YZ 167 9 028 6Z 85 4 008 YA 173 8 029 6A 88 5 009 YB 179 9 030 6B 91 5 010 ZZ 186 2 031 7Z 94 8 011 ZA 192 8 032 7A 97 4 012 ZB 203 5 033 M1 100 013 1Z 206 5 034 8Z 103 5 014 1A 210 7 035 M2 107 2 015 1B 218 1 036 M3 110 9 016 2Z 225 7 037 M4 114 8 017 2A 229 1 038 9Z 118 8 018 2B 233 6 039 M5 123 019 3Z 241 8 040 M6 127 3 020...

Page 53: ... 112 32 047 165 069 365 091 631 113 43 048 172 070 371 092 632 114 47 049 174 071 411 093 645 115 51 050 205 072 412 094 654 116 54 051 223 073 413 095 662 117 65 052 226 074 423 096 664 118 71 053 243 075 431 097 703 119 72 054 244 076 432 098 712 120 73 055 245 077 445 099 723 121 74 056 251 078 464 100 731 122 114 057 261 079 465 101 732 123 115 058 263 080 466 102 734 124 116 059 265 081 503 1...

Page 54: ...ave been entered Radio will display COPY OK 7 Press to conÞrm channel duplication or to exit without duplication 8 Turn off your radio if you have completed the programming or proceed to the next parame ter 4 10 2 Entering a Channel Alias Scenario To give Channel 028 an alias SECURITY Steps 1 Enter Programming Mode by pressing MON and turning on the radio 2 Press or until CH 028 is displayed 3 Pre...

Page 55: ...nnel number 6 Press PTT or MON when all the channel numbers have been entered 7 Turn off your radio if you have completed the programming or proceed to the next parame ter 4 10 4 Programming an ID Scenario To program PTT ID with the value ÒA1018Ó Steps 1 Enter Programming Mode by pressing MON and turning on the radio 2 Press or until RW is displayed 3 Press PTT or MON until PTT ID is displayed 4 P...

Page 56: ...phone number NOTE If a mistake is made use or to move to the appropriate location and then re enter the correct character To erase the complete phone number code enter 16 times 8 Press PTT or MON when the complete phone number has been entered 9 Turn off your radio if you have completed the programming or proceed to the next parame ter 4 11 Factory Reset This feature allows you to erase certain pr...

Page 57: ...s error codes on the radio display The presence of an error code should prompt the user that a problem exists and that a service technician should be contacted Use the following table to aid in understanding particular error code displays Table 5 1 Error Codes Failure Display Description MEM ERR Defective ROM EEP ERR Defective external EEPROM Codeplug data is corrupted PLL ERR The radio cannot rec...

Page 58: ...5 2 This page is intentionally left blank ...

Page 59: ...MHz PMAD4015_ 14cm Antenna 155 174MHz HLN8262_ External Antenna Adapter BNC connector 2 0 Carrying Accessories 4285820Z01 Shoulder Strap HLN9844_ Belt Clip 1 5 RLN4815_ Universal RadioPak Carry Case HLN9985_ Waterproof Bag JMZN4020_ Hand strap for radio 3 0 Carry Cases PMLN4467_ Carrying Case Soft Leather Black PMLN4468_ Carrying Holster Case Neoprene Grey PMLN4469_ Carrying Holster Case Neoprene ...

Page 60: ...Accessories PMLN4442_ MAG ONE Earbud with in line PTT MIC Vox Switch PMLN4443_ MAG ONE Ear Receiver with in line PTT MIC Vox Switch PMLN4444_ MAG ONE Earset Boom Mic with in line PTT Vox Switch PMLN4445_ MAG ONE Ultra lightweight Headset with in line PTT Vox PMMN4008_ MAG ONE Remote Speaker Mic HMN9030_ Remote Speaker Microphone PMLN4294_ Ear Set Microphone with PTT PMLN4425_ Earset Boom Mic with ...

Page 61: ... Kits 6 3 8 0 Service Kits PMVN4059_ Alpha Series Radio CPS Installation Kit Disk PMVN4061_ Alpha Series Radio CPS Installation Kit CD PMVN4060_ Tuner Installation Kit Disk PMVN4062_ Tuner Installation Kit CD ...

Page 62: ...6 4 This page is intentionally left blank ...

Page 63: ...er Board Assembly X DS1M001160 RF Board Assembly X DS1M001170 LCD Kit X DS1M001180 Label Kit X DS1M001190 Speaker Assembly X X DSM1B26051 Screw M2 6 X DSM2192004 Contact Gasket X X DSM2192005 Main Gasket X X DSM2192006 Volume Gasket X X DSM4193013 Gasket Screw 26 X DSM5190001 Housing Back X X DSM6189003 PTT Button X DS1M001200 Back Chassis Kit X X PMAD4027_ 15cm Antenna 136 155M X X PMAD4028_ 15cm...

Page 64: ...7 2 Model Chart X 6804112J32 GP2000 User Guide English X 6804112J49 GP2000 User Guide Chinese VHF 136 174 MHz Model Description x Indicates one of each is required ...

Page 65: ...st with impact re sistant polycarbonate housing passes EIA RS 316B Dust and Humidity Weather resistant hous ing passes EIA RS 316B VHF RF Output NiMH 7 5V Low 1W High 5W Channel Spacing 12 5 25 kHz Freq Stability 30 C to 60 C 0 00025 Spurs Harmonics 26 dBm Audio Response from 6 dB oct Pre Emphasis 300 to 3000Hz 1 3 dB Audio Distortion 1000 Hz 60 Rated Max Dev 5 FM Noise 40 dB VHF 12 5kHz VHF 25kHz...

Page 66: ...off The radio can be turned off on two ways 1 Power Switch turned off 2 Low Battery When a low battery level is detected by the CPU it stores the radio personality data to EEPROM before turning off the radio 3 3 Power up Sequence 1 Power supply is turned on by the On Off Volume Control Power Switch 2 Power from battery is supplied to the regulator through the switch 3 Output 5V from the regulator ...

Page 67: ...4 4MHz at room temperature 22ûC Temperature variations cause resistance changes in thermistor R330 and R567 which is on the base of Q320 thus varying the voltage applied to varactor Q322 This changes the impedance across crystal X301 in a manner complementary to the temperature drift characteristic of the crystal In this way the reference oscillator is held within the speciÞed 2 5 PPM from 30 to 6...

Page 68: ...in 7 will begin pulsing low A RC circuit converts this low pulse to a low level for the CPU The CPU then changes the RX TX line to a high thus signaling the other transistor switches to drive Q201 into cutoff which disables transmission Therefore the transmitter remains disabled while the loop remains out of lock and PLL ERR is displayed 3 5 4 Loop Filter The Loop Filter a passive lead lag Þlter c...

Page 69: ...audio is directed to ampliÞer Q602B Q602A and low pass Þlter Q602C and Q602D Q602A has limiting function The modulation adjustment is done by Pot RV601 and directed to a four pole active low pass Þlter The resulting signal is then limited and is directed to a low pass Þlter 18dB per octave roll off above 3KHz The audio is then directed through the 25KHz 12 5KHz channel spacing SW Q601 to varactor ...

Page 70: ...dio The audio is unmuted by the CPU Q101 Pin 41 switching to a high 5V thus biasing on Q503 The audio is then routed to the audio ampliÞer Q702 via the volume control SW201 3 7 5 Receiver Audio Circuit The detectorÕs audio output also is fed to the tone CTCSS and DCS low pass Þlter Q505A Then the output of the low pass Þlter is routed to the second stage Þlter Q505B The output of Q505B is passed t...

Page 71: ... TX RX SW Q208 Q209 VCO Buffer Q308 RX VCO Q311 Q324 TX VCO Q325 Q326 TX RX SW Q308 Q310 Audio Modulator Q329 Loop Filter Q314 316 Pin15 16 CN701 Pin37 38 39 Pin11 10 9 Pin1 2 TCXO 14 4MHz X301 Q320 Q322 Sub Audio Modulator Q322 6 Pole Ceramic Filter F501 IF AMP Q408 De emphasis Q502A Sub Audio LPF Q505 HPF Q505 Audio Power AMP Q702 EXT Audio Jack J701 6 Pole Ceramic Filter F502 PLL Q323 EEPROM Q1...

Page 72: ...05 DA Converter Q121 CPU Pin87 DIODE Q126 CPU Pin21 CPU Pin22 CPU Pin36 DC AMP Q125 CN101 RX Local Buffer TX Buffer DATA Audio Sub Audio TX RX SW CONTL Ripple Filter Q330 5V VCO Buffer Q308 RX VCO Q311 Q324 TX RX SW Q309 Q310 Audio Modulator Q329 Sub Audio Modulator Q322 TCXO 14 4MHz X301 Q320 322 Loop Filter Q314 Q315 Q316 PLL Q323 CN701 Pin37 38 39 Pin11 10 9 Pin15 16 Pin 1 2 TX VCO Q325 Q326 Po...

Page 73: ... Switch Q409 410 Buffer AMP Q414 Coupler R445 Pre Driver Q413 P in VCO Final AMP Q411 PA Q412 DAC RX From VCO From ANT Switch 2 Pole Band Pass Filter Q401 2 Pole Band Pass Filter Q405 2 Pole Crystal Filter F402 2nd Local 44 654MHz X501 6 Pole Ceramic Filter F501 6 Pole Ceramic Filter F502 Mixer Q407 RF AMP Q404 Local Buffer Q416 IF AMP Q408 IF IC Q506 2nd Mix 2nd Local IF AMP DISC Noise AMP ...

Page 74: ...7 12 This page is intentionally left blank ...

Page 75: ...tic Diagrams and Parts List Section 7 13 5 0 Circuit Board Schematic Diagrams and Parts List Q118 Q119 R108 R109 C141 C142 R107 Q115 Q116 LC101 M101 DOWN UP 1 2 4 7 5 8 0 A B D C 3 6 9 Top Side Bottom Side Controller Board ...

Page 76: ...Section 7 14 Circuit Board Schematic Diagrams and Parts List VHF 136 174 MHz Main Board Top Side ...

Page 77: ...Circuit Board Schematic Diagrams and Parts List Section 7 15 VHF 136 174 MHz Main Board Bottom Side ...

Page 78: ...Section 7 16 Circuit Board Schematic Diagrams and Parts List Complete Controller Board Schematic Diagram ...

Page 79: ...Q208 DTA114EE R209 10 R210 22 Q209 DTC114EE C211 0 001 4 6 0 03 0 06 5 0 Vin 2 GND 1 Vout 5 NC 4 CE 3 Q204 XC62HR5002PR C218 0 001 C206 0 001 C207 10u6V T C208 0 01 R204 47K R205 50k 5 0 Q203 1SR154 400 C205 0 01 3 2 1 BATT THERM GND CN201 09D86237A C303 0 022 R301 1K C301 10u6V T C302 0 1 Vin 1 OSC 2 DK 3 Vout 4 GND 5 TI 6 Q301 TK11816M L303 1000uH 6 2 C304 10u 16V T C305 0 22 R302 220 12 8 Q607 ...

Page 80: ...RM39B102K50PT N A C154 0 001uF 50V 10 Murata GRM39B102K50PT N A C155 0 001uF 50V 10 Murata GRM39B102K50PT N A C156 0 01uF 50V 10 Murata GRM39B103K50PT N A C157 0 01uF 50V 10 Murata GRM39B103K50PT N A C158 47pF 50V 5 Murata GRM39CH470J50PT 2113740F43 C159 47pF 50V 5 Murata GRM39CH470J50PT 2113740F43 C160 47pF 50V 5 Murata GRM39CH470J50PT 2113740F43 C161 0 001uF 50V 10 Murata GRM39B102K50PT N A C162...

Page 81: ...m MCR03 EZHJ 331 0662057A37 R170 47 K ohm 0 1W 5 Rohm MCR03 EZHJ 473 0662057A89 R171 47 K ohm 0 1W 5 Rohm MCR03 EZHJ 473 0662057A89 R172 47 K ohm 0 1W 5 Rohm MCR03 EZHJ 473 0662057A89 R173 4 7 K ohm 0 1W 5 Rohm MCR03 EZHJ 472 0662057A65 R174 4 7 K ohm 0 1W 5 Rohm MCR03 EZHJ 472 0662057A65 R175 4 7 K ohm 0 1W 5 Rohm MCR03 EZHJ 472 0662057A65 R176 22 K ohm 0 1W 5 Rohm MCR03 EZHJ 223 0662057A81 Circu...

Page 82: ...1J50PT 2113740F51 Circuit Ref Description Vendor Vendor Part Number Motorola Equivalent Part Number C419 100pF 50V 5 Murata GRM39CH101J50PT 2113740F51 C420 330pF 50V 10 Murata GRM39B331K50PT N A C421 Not Placed C422 150p 50V 0 5pF Murata GRM39CH100D50PT 2113740F27 C423 Not Placed C424 10pF 50V 0 5pF Murata GRM39CH100D50PT 2113740F27 C425 20pF 50V 5 Murata GRM39CH200J50PT 2113740F34 C426 10pF 50V 0...

Page 83: ...T N A C532 220pF 50V 10 Murata GRM39B221K50PT N A Circuit Ref Description Vendor Vendor Part Number Motorola Equivalent Part Number C533 47pF 50V 5 Murata GRM39CH470J50PT 2113740F43 C534 2 2uF 10V 20 NEC TESVA1A225M1 8R N A C535 0 027uF 25v 10 Murata GRM39B273K25PT 2155169N29 C536 0 047uF 16V 10 Murata GRM39B473K16PT N A C537 0 0027uF 50V 10 Murata GRM39B272K50PT 21SW973A115 C538 0 01uF 16V 2 Mura...

Page 84: ...80048M03 Q501 DUAL PNP NPN Rohm UMC4N TR N A Q503 FET Toshiba 2SJ144Y TE85L N A Circuit Ref Description Vendor Vendor Part Number Motorola Equivalent Part Number Q504 NPN Rohm DTC144EETL 4880048M03 Q509 PNP Rohm DTA144EETL N A Q601 NPN Rohm DTC144EETL 4880048M03 Q605 NPN Rohm DTC144EETL 4880048M03 Q608 NPN Rohm DTC144EETL 4880048M03 Q609 DUAL NPN Rohm UMG2N TR N A Q613 PNP Rohm DTA144EETL N A Q616...

Page 85: ...Ref Description Vendor Vendor Part Number Motorola Equivalent Part Number J401 Antenna Jack Motorola 02D04852J N A J701 Audio Jack Motorola 09R80683Z01 N A CERAMIC FILTER F501 455Khz Toko ALFYM455F F502 455Khz Toko ALFYM455H CRYSTAL F401 Not Placed F402 ÒFilter 45 1 MhzÓ Hertz 45N12A5 45 1MHz UM 5J SMD DSXF137006 X301 ÒCrystal 14 4MHzÓ Nikko Denshi TOP B 14 4MHz DSXT181001 X501 ÒCrystal 44 645MHzÓ...

Page 86: ...ndor Part Number Motorola Equivalent Part Number R422 56 ohm 0 1W 5 Rohm MCR03 EZHJ 560 0662057A19 R423 22 K ohm 0 1W 5 Rohm MCR03 EZHJ 223 0662057A81 R424 12 K ohm 0 1W 5 Rohm MCR03 EZHJ 123 0662057A51 R425 Not Placed R426 100 ohm 0 1W 5 Rohm MCR03 EZHJ 101 0662057A25 R427 12 K ohm 0 1W 5 Rohm MCR03 EZHJ 123 0662057A51 R428 100 K ohm 0 1W 5 Rohm MCR03 EZHJ 104 0662057A97 R429 470 ohm 0 1W 5 Rohm ...

Page 87: ...97 R608 100 K ohm 0 1W 5 Rohm MCR03 EZHJ 104 0662057A97 Circuit Ref Description Vendor Vendor Part Number Motorola Equivalent Part Number R609 680 K ohm 0 1W 5 Rohm MCR03 EZHJ 684 0662057B18 R610 22 K ohm 0 1W 5 Rohm MCR03 EZHJ 223 0662057A81 R611 Chip Thermistor Hokuriku NSM3503J400J N A R612 100 K ohm 0 1W 5 Rohm MCR03 EZHJ 104 0662057A97 R615 12 K ohm 0 1W 5 Rohm MCR03 EZHJ 123 0662057A75 R616 ...

Page 88: ...K ohm 0 1W 5 Rohm MCR03 EZHJ 222 0662057A57 R712 1 K ohm 0 1W 5 Rohm MCR03 EZHJ 102 0662057A49 R713 10 K ohm 0 1W 5 Rohm MCR03 EZHJ 103 0662057A73 R714 10 K ohm 0 1W 5 Rohm MCR03 EZHJ 103 0662057A73 R715 4 7 K ohm 0 1W 5 Rohm MCR03 EZHJ 472 0662057A65 RV601 10 K ohm 0 1W 5 Rohm MVR22 HXBR N 103 N A RV602 10 K ohm 0 1W 5 Rohm MVR22 HXBR N 103 N A Circuit Ref Description Vendor Vendor Part Number Mo...

Page 89: ...ter and antenna path Check external components connected to IFIC If OK replace Q506 Check mixer Q407 Is Q506 biased correctly Check XTAL filter X501 Check 5vRX and IF amp components Is 12 dBS 116 dBm Check Q702 Is Q404 biased properly Check 2 pole and RF BPF components Check 5vRX and Q404 bias circuitry 1 Is 2nd LO on freq Check VDC of all IFIC pins Are VDC of pin 4 and 10 of IFIC OK Are voltages ...

Page 90: ...heck Pin3 to Q419 Is Pin OK Check Q201 Q202 U151 Check Voltages in Power Control Circuit Check Voltages in PA Line up Troubleshoot VCO Done Is Power OK 1 Check Pin Diodes 2 Check Harmonic Filter Inspect Repair TX Output Network NO NO LOW HIGH YES NO NO YES YES YES Troubleshooting Flow Chart for Transmitter ...

Page 91: ...03 R301 C304 R302 Fix Connection Is Connection between Q310 Pin 2 CN701 Pin 35 OK Replace C701 Remove Shorts Is there a short between Pin 32 and Pins 9 10 of U201 Replace Q201 Replace or resolder necessary components Is RF level at Q324 between 10 5 dBm Are Q308 L301 C308 C310 C309 Replace Q308 See VCO troubleshooting chart Are Waveforms at Pins 2 of Q323 Do Pins 9 10 11 of Q323toggle when channel...

Page 92: ... PROBLEM TROUBLE SHOOT AUDIO CKT WITH POWER CONNECTED TO RADIO AND THE RADIO TURNED ON CHECK THE FOLLOWING 1 5V AT PIN 87 OF Q101 IF NONE CHECK U411 2 WITH HIGH IMPEDANCE PROBE CHECK FOR 7 9488MHZ AT PIN 13 AND 12 OF Q101 IF NO SIGNAL CHECK REPLACE X101 3 CHECK DC AT PIN 9 OF Q121 IF 4 5VDC CHECK CN101 PIN 15 4 CHECK FOR TYPICAL VOLTAGES OF Q101 AND Q114 VOLTAGES BEEP PRESENT TURN ON PRESENT DONE ...

Page 93: ... at Pin 4 of Mixer VisualCheck of Board OK If all parts from Q324 of mixer are OK then replace Q324 If all parts associated with those PinÕs are OK then replace Q308 If all parts from Q325 Pin 4 to Input of PA are OK then replace Q325 If C359 and L316 are OK then replace Q329 Replace R347 Replace C311 Low or no power at Input to PA Visual check of Board OK Correct Problem Make sure Synthesizer is ...

Page 94: ...Section 7 32 This page is intentionally left blank ...

Page 95: ...ECURITY Channel Bandwidth The channel spacing when operating on the current channel Channel Enabled When selected the channel is enabled and accessible Coded Squelch When the channel receives incoming message that contains the same PL or DPL code as its Rx PL DPL code the radio unmutes Codeplug A solid state chip inside a radio where the radioÕs personality data is stored Communications Port COM P...

Page 96: ...If activated the radio would send the preprogrammed Acknowledgement ID when an Individual Call is received Landed Scan State When the radio is in Scan Mode and once Active Scan Þnds an eligible Scan List Member channel call to receive or unmute to the radio is then in Landed Scan State Also once both Transmit and Receive activity has ceased and while the Scan Hang Timer is counting down the radio ...

Page 97: ...current channel PLL Phase Locked Loop a circuit in which an oscillator is kept in phase with a ref erence usually after passing through a frequency divider Pretime Selects the amount of time between PTT button press and the Þrst digit of ID transmission This time allows the receiving radio to stabilize before receiving data Priority Scan For Priority Scan the radio assigns the highest priority to ...

Page 98: ...ect a personal computer to a radio for the purpose of communi cation between the two The RIB consists of level shifting circuits that convert from the standard RS 232 voltage levels of the computer asynchronous serial interface COM Port to the single ended voltage levels present on the Serial Bus contacts of the radioÕs connector The RIB must have an appropriate RIB to radio and RIB to computer Ra...

Page 99: ...l List Individual Group and All ID s Serial Number Each radio has its own unique serial number This information is stored in the radioÕs codeplug Short Press Function Function that is invoked if the button is pressed and released within one sec ond Softpot Software Potentiometer a computer adjustable electronic attenuator Software Computer programs procedures rules documentation and data pertainin...

Page 100: ...y Economy Low Used when communicating distance is close e g within the same warehouse stadium etc Tx TPL Frequency A designated frequency used to transmit Tone Private Line TPL encoding while operating on the current channel This frequency can directly correlate to the Tx TPL Code Þeld however non standard code frequencies may also be selected µC Microcontroller UHF Ultra High Frequency Unmuting A...

Page 101: ...anual No 6804112J41 Kindly complete the Service Manual Feedback Form on the next page to help us ensure that you receive the most accurate and complete information Fax to 6 04 6124944 The Technical Publications Coordinator Media and Communications R D Department Motorola Penang Your Details Name Contact Person Company Name Address Telephone No Fax No Email Address How would you like to receive the...

Page 102: ...Þc equipment o very much so o generally yes o to some extent o no 4 We would appreciate any corrections or recommendations for improving this manual Please include the speciÞc page number s of the diagram or procedure in question 5 General comments suggestions Manual No 6804112J41 Fax to 6 04 6124944 The Technical Publications Coordinator Media and Communications R D Department Motorola Penang Com...

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