Motorola CDM Series Service Manual

CDM Series™Professional SeriesTwo-Way Mobile RadioBasic Service Manual

1-2 Introduction1.2.3 Piece Parts AvailabilitySome replacement parts, spare parts, and/or product information can be ordered directly.Motorola Online:

Introduction 1-3Fax OrdersCustomer Care and Services Division*1-800-622-6210847-576-3023 (International)USFGMD(Federal Government Orders)1-800-526-864

1-4 Introduction1.3 Radio Model InformationThe model number and serial number are located on a label attached to the back of your radio. You can deter

2-1Chapter 2Maintenance2.1 IntroductionThis chapter provides details about the following:l Preventive maintenance (inspection and cleaning) l Safe han

2-2 Maintenancedislodged material out and away from the inside of the radio. Make sure that controls or tunable components are not soaked with alcohol

Maintenance 2-3Rigid Circuit BoardsThis family of radios uses bonded, multi-layer, printed circuit boards. Since the inner layers are not accessible,

2-4 MaintenanceFigure 2-1: Typical Control Head Removal3. Pull the control head away from the radio assembly as shown in Figure 2-2.Figure 2-2: Flexi

Maintenance 2-53. Lift the top cover from the chassis.Figure 2-3: Top Cover Removal2.6.3 Transceiver Board Removal1. Remove six screws (nine for LowBa

2-6 Maintenance3. Slowly lift the transceiver board on the edge at the front of the radio (the edge that mates with the control head) and pull gently

Maintenance 2-7device may have been over-stressed as well. Handle the transceiver board per the procedure for “Safe Handling of CMOS and LDMOS Devices

2-8 MaintenanceFigure 2-6: Control Head Back Housing Removal2. Press the dismantling tool until the snap connectors on the side of the back housing re

Maintenance 2-9Figure 2-8: Board, Keypad and Speaker Removal6. Remove the speaker from the control head housing.2.6.5 CDM1250, CDM1550, CDM1550•LS, an

2-10 Maintenance5. Remove the display from the control head housing.2.7 Radio Assembly2.7.1 CDM750 Control Head 1. Locate the speaker in the control h

Maintenance 2-115. Torque the six screws to 17 in lbs. (1.9 NM) using the T20 TORX™ driver. Begin with the two screws located in the middle of the cha

2-12 MaintenanceFigure 2-10: Top view of the LowBand radio chassis and die cast cover showing the screw sequence2.7.4 Control Head Fitting1. Align the

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CDM Series™Professional SeriesTwo-Way Mobile RadioBasic Service ManualMotorola, Inc.8000 West Sunrise BoulevardFort Lauderdale, Florida 333226881091C

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Service Aids 2-192.13 Service AidsTable 2-1 lists service aids recommended for radio maintenance.Table 2-1: Service AidsMotorola Part No.Description A

2-20 Service Aids2.14 Test EquipmentTable 2-2 lists test equipment required to service these and other two-way radios.† For those customers that need

Service Aids 2-212.15 Programming Test Cable Configuring and WiringFigure 2-11: Programming/Test Cable AARKN4083_Figure 2-12: Pin Configuration of the

2-22 Service AidsNotes

3-1Chapter 3Transceiver Performance Testing3.1 GeneralThese radios meet published specifications through their manufacturing process by utilizing high

3-2 Transceiver Performance Testing3.3 RF Test ModeThis test mode is for display radios only. When the radio is operating in its normal environment, t

Transceiver Performance Testing 3-3To enter test mode:1. Turn the radio on.2. Within ten seconds after the self test is complete, press button P2, fiv

3-4 Transceiver Performance TestingTable 3-3: Test EnvironmentsTable 3-4: Test Channel SpacingNo. of BeepsDescription Function1 Carrier Squelch RX: if

Transceiver Performance Testing 3-5Table 3-5: Test FrequenciesTest ModeTest Channel Low PowerTest Channel High PowerLowBandRange 1 29.7 - 36 MHzLowBan

iiForewordThis manual provides sufficient information to enable qualified service technicians to troubleshoot and repair CDM Series mobile radios to t

3-6 Transceiver Performance TestingTable 3-6: Transmitter Performance ChecksTest Name Communications Analyzer Radio Test Set CommentReference Frequenc

Transceiver Performance Testing 3-7* See Table 3-4** MDCPL/DPL ModulationAs above4th channel test frequency*BW to narrowTEST MODE, Test Channel 4TPLDP

3-8 Transceiver Performance Testing* See Table 3-4Table 3-7: Receiver Performance ChecksTest Name Communications Analyzer Radio Test Set CommentRefere

4-1Chapter 4Radio Programming and Tuning Procedures4.1 IntroductionThis chapter provides an overview of the Customer Programming Software (CPS) and tu

4-2 Radio Programming and Tuning ProceduresFigure 4-2: CPS Programming Setup Cable with Internal RIBFigure 4-3: CPS Programming Setup Cable with Inter

Radio Programming and Tuning Procedures 4-34.3 Radio Tuning SetupA personal computer (PC), Windows 95/98/NT, and a tuner program are required to tune

4-4 Radio Programming and Tuning Procedures4.4 Transmitter TuningThe following sub-sections contain the procedures to tune the radio transmitter. Thes

Radio Programming and Tuning Procedures 4-5Table 4-3: PA Bias Specifications**These values are up-to-date as of the print date. For the latest values

4-6 Radio Programming and Tuning ProceduresTable 4-4: Reference Oscillator Warp Specifications**These values are up-to-date as of the print date. For

Radio Programming and Tuning Procedures 4-74.4.4 Transmit Power TuningPerform the transmit high power tuning procedure as follows:1. Under the Tx Alig

iiiTable of ContentsForeword...iiProduct Safety

4-8 Radio Programming and Tuning Procedures4.4.6 Modulation Balance AttenuationPerform the modulation balance attenuation procedure as follows:1. Unde

Radio Programming and Tuning Procedures 4-94.4.7 VCO AttenuationTable 4-6: Deviation Specifications for UHF/VHF/LowBand Radios**These values are up-to

4-10 Radio Programming and Tuning Procedures4. Note the deviation obtained.5. Adjust the slider, adjust the spin control or key in softpot values for

Radio Programming and Tuning Procedures 4-114.4.11 DTMF Deviation TuningThis tuning option controls the dual-tone, multi-frequency (DTMF) deviation. P

4-12 Radio Programming and Tuning Procedures4.5.1 Front End Filter TuningThe following values in Table 4-7 through Table 4-12 are up-to-date as of the

Radio Programming and Tuning Procedures 4-13Table 4-9: Default Softpot Values for UHF (403-470 MHz/ 40W)Table 4-10: Default Softpot Values for UHF (45

4-14 Radio Programming and Tuning ProceduresTable 4-12: Default Softpot for UHF (450-512 MHz/ 25W - LDMOS)Perform the front end filter tuning procedur

Radio Programming and Tuning Procedures 4-15*These values are up-to-date as of the print date. For the latest values and procedures, refer to the Tune

4-16 Radio Programming and Tuning Procedures4.5.3 Squelch TuningPerform the squelch tuning procedure as follows:1. Under the Rx Align menu, select Squ

Radio Programming and Tuning Procedures 4-17Manual Squelch Tuning:1. Under the Rx Align menu, select Squelch Atten. Select either Squelch Atten 12.5 k

iv2.6.5 CDM1250, CDM1550, CDM1550•LS, and CDM1550•LS+ Control Head Disassembly ...

4-18 Radio Programming and Tuning ProceduresNotes

5-1Chapter 5Power Up Self-Test5.1 Error Codes - Conventional RadiosTurning on the radio starts a self-test routine that checks the RAM, ROM checksum,

5-2 Power Up Self-Test5.2 CDM1550•LS+ PassPort Tone OptionsIn order to provide more detailed information about the radio’s state to a user or service

Power Up Self-Test 5-35.3 CDM1550•LS+ Special Diagnostic FunctionsSome special diagnosis functions can be turned on "as needed" by accessing

5-4 Power Up Self-Test5.4 CPS/PPCPS Programming SetupThe CPS/PPCPS programming setup, shown in Figure 5-1:, is used to program the radio codeplug.Note

6-1Chapter 6Accessories6.1 AccessoriesTo order, contact the Motorola Customer Care and Services Division. For Contact Information, please see section

6-2 Accessories6.1.2 Mounting6.1.3 Remote Mount6.1.4 Loudspeaker6.1.5 AudioRLN4774 3-Point Mounting Tray (LowBand)GLN7317 Trunnion, High Profile Mount

Accessories 6-36.1.6 Hands Free Operation6.1.7 Base ControlAARMN4027 Microphone, Visor MountedRLN4856 Footswitch PTTRLN4857 Push-button PTTRLN4858 Goo

6-4 Accessories6.1.8 Desktop6.1.9 Installation6.1.10 Option Boards* Voice Storage included in the PassPort board.6.1.11 ButtonsHPN4002 Power Supply an

Accessories 6-53886133B053886133B063886133B113886133B123886133B143886133B153886133B163886133B35CDM1250/CDM1550/CDM1550•LS/CDM1550•LS+3886134B033886134

v4.4.5 Power Amplifier (PA) Voltage Limit Tuning (VHF 1-25W and UHF 1-25W LDMOS radios only)...

6-6 Accessories3886134B233886134B243886134B253886134B263886134B273886134B283886134B293886134B303886134B333886134B373886134B383886134B393886134B4038861

Accessories 6-76.2 Error Codes - PassPortFor the purpose of this document the phrase “PassPort Trunking Controller Board” and its acronym “PTCB” are u

6-8 AccessoriesNotes

7-1Chapter 7Model Chart and Test Specifications7.1 UHF 403-470 MHz (Conventional)CDM Series, UHF, 403-470 MHzModel DescriptionAAM25RHC9AA1_N CDM750, 4

7-2 Model Chart and Test Specifications7.2 UHF 450-512 MHz (Conventional)CDM Series, UHF, 450-512 MHzModel DescriptionAAM25SKC9AA1_N CDM750, 450-512 M

Model Chart and Test Specifications 7-37.3 UHF 403-470 MHz (Conventional, LTR)7.4 UHF 450-512 MHz (Conventional, LTR)CDM Series, UHF, 403-470 MHz (LTR

7-4 Model Chart and Test Specifications7.5 UHF 403-470 MHz (Conventional, LTR/PassPort)CDM Series, UHF, 403-470 MHz (LTR/PassPort)Model DescriptionAAM

Model Chart and Test Specifications 7-57.6 UHF 450-512 MHz (Conventional, LTR/PassPort)CDM Series, UHF, 450-512 MHz (LTR/PassPort)Model DescriptionAAM

7-6 Model Chart and Test Specifications7.7 LowBand 29.7-36 MHz“X” indicates one of each is required7.8 LowBand 36-42 MHzCDM Series, LowBand, 29.7-36 M

Model Chart and Test Specifications 7-77.9 LowBand 42-50 MHzCDM Series, LowBand, 42-50 MHzModel DescriptionAAM25DKC9AA1_N CDM750, 42-50 MHz, 40-60W, 2

viChapter 7Model Chart and Test Specifications ... 7-17.1 UHF 403-470 MHz (Conventional)...

7-8 Model Chart and Test Specifications7.10 VHF 136-174 MHzCDM Series, VHF, 136-174 MHz (Conventional/LTR)Model DescriptionAAM25KHC9AA1_N CDM750, 136-

Model Chart and Test Specifications 7-97.11 VHF 136-174 MHz (LTR and PassPort)CDM Series, VHF, 136-174 MHz (LTR and Passport)Model DescriptionAAM25KHF

7-10 Model Chart and Test Specifications7.12 Specifications GeneralSpecification LowBand VHF UHFModel Numbers: AAM25BKC9AA1_NAAM25CKC9AA1_NAAM25DKC9AA

Model Chart and Test Specifications 7-11Dimensions (L X W X H)Low power (1-25W):CDM750CDM1250CDM1550CDM1550•LSCDM1550•LS+High power: (25-45W)CDM750CDM

7-12 Model Chart and Test SpecificationsFCC Description: AZ492FT1627 (40-60W, 29.7-36 MHz)AZ492FT1628 (40-60W, 36-42 MHz)AZ492FT1626 (40-60W,42-50 MHz

Model Chart and Test Specifications 7-13ReceiverSpecification LowBand VHF UHFSensitivity (12 dB SINAD): 0.25 µV Typical 0.23 µV TypicalIntermodulation

7-14 Model Chart and Test SpecificationsNOTES

Glossary-1GlossaryGlossary of TermsTerm DefinitionALC Automatic Level Control: a circuit in the transmit RF path that controls RF power amplifier outp

Glossary-2 GlossaryMRTI Motorola Radio-Telephone Interconnect: a system that provides a repeater connection to the Public Switched Telephone Network (

Glossary Glossary-3Squelch Muting of audio circuits when received signal levels fall below a pre-determined valueStandby Mode An operating mode whereb

1-1Chapter 1Introduction1.1 Scope of ManualThis manual is intended for use by service technicians familiar with similar types of equipment. It contain

Glossary-4 GlossaryNotes

6881091C62-D*6881091C62*MOTOROLA, the Stylized M Logo are registered in theU.S. Patent and Trademark Office. All other product orservice names are the