Basic Service Manual Cdm Series

• Basic Service Manual Cdm Series Circuit
• Basic Service Manual Cdm Series 9
• Basic Service Manual Cdm Series Of Unfortunate

. CDM Series ™ Professional Series Two-Way Mobile Radio Basic Service Manual. CDM Series™ Professional Series Two-Way Mobile Radio Basic Service Manual Motorola, Inc. 8000 West Sunrise Boulevard 6881091C62-D Fort Lauderdale, Florida 33322. 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 patent applications of Motorola, except for the normal non-exclusive license to use that arises by operation of law in the sale of a product.

Table of Contents Foreword.ii Product Safety and RF Exposure Compliance. Ii Computer Software Copyrights.ii Document Copyrights. Ii Disclaimer.ii Trademarks.ii Chapter 1 Introduction.1-1 1.1 Scope of Manual.1-1 1.2 Warranty and Service Support.1-1 1.2.1 Warranty Period and Return Instructions. 2.6.5 CDM1250, CDM1550, CDM1550.LS, and CDM1550.LS+ Control Head Disassembly.2-9 2.7 Radio Assembly.2-10 2.7.1 CDM750 Control Head.2-10 2.7.2 CDM1250, CDM1550, CDM1550.LS, and CDM1550.LS+ Control Heads.2-10 2.7.3 Radio Chassis and Transceiver Board.2-10 2.7.3.1 LowBand Radio Chassis and Transceiver Board Assembly.2-11 2.7.4 Control Head Fitting.2-12 2.8 Radio Assembly Exploded Mechanical View and Parts List. 4.4.5 Power Amplifier (PA) Voltage Limit Tuning (VHF 1-25W and UHF 1-25W LDMOS radios only). 4-7 4.4.6 Modulation Balance Attenuation. 4-8 4.4.7 VCO Attenuation.4-9 4.4.8 VCO Attenuation (25 kHz).

4-9 4.4.9 VCO Attenuation (20 kHz).4-10 4.4.10 VCO Attenuation (12.5 kHz). Chapter 7 Model Chart and Test Specifications.7-1 7.1 UHF 403-470 MHz (Conventional).7-1 7.2 UHF 450-512 MHz (Conventional).7-2 7.3 UHF 403-470 MHz (Conventional, LTR). 7-3 7.4 UHF 450-512 MHz (Conventional, LTR). 7-3 7.5 UHF 403-470 MHz (Conventional, LTR/PassPort).7-4 7.6 UHF 450-512 MHz (Conventional, LTR/PassPort). 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.The Customer Care and Services Division (CCSD) was formerly known as the Accesso- ries and Aftermarket Division (AAD).

Motorola Online: Motorola Online users can access our online catalog at To register for online access, please call 800-814-0601. For service, contact the Service Depot in your area. If your area does not have a depot, please contact your Business Development Manager, Distributor, or contact Motorola Technical Support. When contacting Motorola Technical Support, keep the product model number and the unit’s serial number handy. Introduction Radio Model Information The model number and serial number are located on a label attached to the back of your radio. You can determine the RF output power, frequency band, protocols, and physical packages. The example below shows one mobile radio model number and its specific characteristics.

Example: AAM25RHC9AA1AN Table 1-1: Radio Model Number Type. Chapter 2 Maintenance Introduction This chapter provides details about the following: Preventive maintenance (inspection and cleaning) Safe handling of CMOS and LDMOS devices Disassembly and reassembly of the radio Installation of optional retrofit kit Installation of option boards Preventive Maintenance The radios do not require a scheduled preventive maintenance program.

When damaged parts are replaced, identical parts should be used. If the identical replacement part is not locally available, check the parts list for the proper Motorola part number.

Order parts from the nearest Motorola Communications parts center listed in Chapter 1, Introduction. Dismantling Tool If a unit requires more complete testing or service than is customarily performed at the basic level, send the unit to a Motorola Authorized Service Center. (See Chapter 1, Introduction for a list of regional service centers.) The following disassembly procedures should be performed only if necessary. Maintenance Dismantling Tool Figure 2-1: Typical Control Head Removal 3. Pull the control head away from the radio assembly as shown in Figure 2-2. Flexible Connection Figure 2-2: Flexible Connection Removal 4.

Remove the flexible connection from the socket on the control head board. 2.6.2 Top Cover Removal 1. Maintenance 3. Lift the top cover from the chassis.

Dismantling Tool Figure 2-3: Top Cover Removal 2.6.3 Transceiver Board Removal 1. Remove six screws (nine for LowBand) from the diecast cover using the T20 TORX™ driver as shown in Figure 2-4. Maintenance 3. 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 toward the front of the radio as shown in Figure 2-5. Take care to slide the antenna connector and power connector out of the chassis towards the front. Maintenance device may have been over-stressed as well. Handle the transceiver board per the procedure for “Safe Handling of CMOS and LDMOS Devices”, Section 2.3.

If removing the transceiver board, the thermal pad material under the two Final stage devices (Q1402 and Q1403) on the radio chassis has been pulled up such that the radio chassis is exposed through the thermal pad, then the defective thermal pads must be removed and replaced. Maintenance Figure 2-6: Control Head Back Housing Removal 2. Press the dismantling tool until the snap connectors on the side of the back housing release from the control head. Disconnect the speaker socket. Figure 2-7: Control Head Board Knob Removal 4. Maintenance Figure 2-8: Board, Keypad and Speaker Removal 6.

Remove the speaker from the control head housing. 2.6.5 CDM1250, CDM1550, CDM1550 LS, and CDM1550 Control Head Disassembly 1. Dismount the control head housing from the back housing as described for control head CDM750, Figure 2-6.

2-10 Maintenance 5. Remove the display from the control head housing. Note: DO NOT touch or contaminate the conductive pads on the under side of the keypad or the conductive contacts on the printed circuit board.

Radio Assembly 2.7.1 CDM750 Control Head 1. Maintenance 2-11 5. 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 chassis followed by the four outer screws. Since the screws usually take a set, torque the screws a second time (1.9 NM) in the same order. 2-12 Maintenance Figure 2-10: Top view of the LowBand radio chassis and die cast cover showing the screw sequence 2.7.4 Control Head Fitting 1.

Align the “0” mark on the flex with the “0” mark on the chassis to the socket on the radio assembly as shown in Figure 2-2.  5DGLR $VVHPEO (SORGHG 0HFKDQLFDO 9LHZ DQG 3DUWV /LVW,WHP 0RWRUROD 3DUW 1XPEHU 'HVFULSWLRQ % &KDVVLV : % &KDVVLV : % &KDVVLV : 1 Ghz Specifications subject to change without notice. All electrical specifications and methods refer to EIA/ TIA 603 standards. CDM Series radios meet or exceed requirements of MIL STD 810 C, D, E. 7-14 Model Chart and Test Specifications NOTES. Low Level Expander: slight amount of volume expansion; used to improve the signal to noise ratio.

Low-Speed Handshake: 150 baud digital data sent to the radio during trunked operation while receiving audio. Trunked Signaling Protocol using low-speed data. Registered trademark of E.F. Johnson Company.

Motorola Data Communication. Glossary-2 Glossary Glossary of Terms MRTI Motorola Radio-Telephone Interconnect: a system that provides a repeater connection to the Public Switched Telephone Network (PSTN). The MRTI allows the radio to access the telephone network when the proper access code is received.

Glossary Glossary-3 Glossary of Terms Squelch Muting of audio circuits when received signal levels fall below a pre-determined value Standby Mode An operating mode whereby the radio is muted but still continues to receive data System Central Main control unit of the trunked dispatch system; handles ISW and OSW Controller messages to and from subscriber units (see ISW and OSW). Glossary-4 Glossary Notes.

MOTOROLA, the Stylized M Logo are registered in the U.S. Patent and Trademark Office. All other product or service names are the property of their respective owners. © Motorola, Inc. 2005.6881091C62. 6881091C62-D.

Basic Service Manual Cdm Series Circuit

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Basic Service Manual Cdm Series 9

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Basic Service Manual Cdm Series Of Unfortunate

” Brand: Motorola.