Nikon CM200 service manual Safe Handling of Cmos and Ldmos Devices

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MAINTENANCE

 

 

Cleaning Internal Circuit Boards and Components

Isopropyl alcohol (100%) may be applied with a stiff, non-metallic, short-bristled brush to dislodge embedded or caked materials located in hard-to-reach areas. The brush stroke should direct the dislodged material out and away from the inside of the radio. Make sure that controls are not soaked with alcohol. Do not use high-pressure air to hasten the drying process since this could cause the liquid to collect in unwanted places. After completing of the cleaning process, use a soft, absorbent, lintless cloth to dry the area. Do not brush or apply any isopropyl alcohol to the frame, front cover, or top cover.

NOTE Always use a fresh supply of alcohol and a clean container to prevent contamination by dissolved material (from previous usage).

3.0Safe Handling of CMOS and LDMOS Devices

Complementary metal-oxide semiconductor (CMOS) devices are used in this family of radios, and are susceptible to damage by electrostatic or high voltage charges. Damage can be latent, resulting in failures occurring weeks or months later. Therefore, special precautions must be taken to prevent device damage during disassembly, troubleshooting, and repair.

Handling precautions are mandatory for CMOS circuits and are especially important in low humidity conditions. DO NOT attempt to disassemble the radio without first referring to the following CAUTION statement.

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 plastic “snow” trays used for storage and transportation of other semiconductor devices.

Ground the working surface of the service bench to protect the CMOS device. We recommend using the Motorola Static Protection Assembly (part number 0180386A82), which includes a wrist strap, two ground cords, a table mat, and a floor mat.

Wear a conductive wrist strap in series with a 100k resistor to ground. (Replacement wrist straps that connect to the bench top covering are Motorola part number 4280385A59)

Do not wear nylon clothing while handling CMOS devices.

Do not insert or remove CMOS devices with power applied. Check all power supplies used for testing CMOS devices to be certain that there are no voltage transients present.

When straightening CMOS pins, provide ground straps for the apparatus used.

When soldering, use a grounded soldering iron.

If at all possible, handle CMOS devices by the package and not by the leads. Prior to touching the unit, touch an electrical ground to remove any static charge that you may have accumulated. The package and substrate may be electrically common. If so, the reaction of a discharge to the case would cause the same damage as touching the leads.

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Contents Commercial Series Page CM200/CM300/PM400 Radios Foreword Table of Contents Transceiver Performance Testing Glossary This page Intentionally Left Blank Safety Information Product Safety and RF Exposure ComplianceThis page is Intentionally Blank Introduction Replacement Parts Ordering Radio Model Information This page Intentionally Left Blank Preventive Maintenance Cleaning ProceduresChapter IntroductionCleaning Internal Circuit Boards and Components Safe Handling of Cmos and Ldmos DevicesRepair Procedures and Techniques General Parts Replacement and SubstitutionDisassembling and Reassembling the Radio General Rigid Circuit BoardsVolume Knob Removal Radio Disassembly DetailedControl Head Removal 3Flat Cable Removal Top Cover Removal 5Top Cover Removal Chassis HorizontalMain Shield Removal PA Shield and DC Cable RemovalPA Clip and Main PCB Removal for Low Power Models 8PA Shield and DC Cable Removal for High Power ModelsMain PCB Removal for High Power Models 10PA Clip and Main PCB Removal for High Power ModelsDisassembly of Control Head CM200 PCBDisassembly of Control Heads CM300/PM400 12Control Head Housing Removal CM300/PM400Chassis Assembly for Low Power Models Radio AssemblyChassis Assembly for High Power Models Control Heads Assembly Control Head FittingOption Board Installation Radio Assembly 1-25 W Models Radio Exploded Mechanical Views and Parts ListsItem No Description Part Number Radio Assembly 25-40 W/25-45 W Models Control Head CM200 Item no DescriptionControl Head CM300/PM400 Service Aids Motorola Part Description ApplicationTest Equipment Programming/Test Cable RKN4083 FLO830308-020Pin Configuration of FKN8113 Adapter Cable FKN8113Setup Service Monitor Test Set Power SupplyGeneral Table Number TitleRF Test Mode To enter test mode display radiosHSS CMPTest Mode Test Name Communications Analyzer Radio Test Set CommentDtmf PL/DPLTPL DPLSinad This page Intentionally Left Blank Description Kit Number CPS Programming/Flashing Setup with RIBCPS CPS Programming/Flashing Setup Ribless CPS Programming Setup with RIB with Telco ConnectorCPS Programming Setup with RIB Accessory Connector CPS Programming Setup with RIBInitial Test Equipment Control Settings Radio Tuning SetupService Monitor Test Set Power Supply Power UP SELF-TEST Error CodesPower UP SELF-TEST Accessories AntennasVHF UHFAlarms and Accessories AudioControl Station Public AddressCables MountingData CES Wireless Technologies PeripheralsAccessory Connector Pin Function SCIMicrophone Connector Pin Function SCI/DTMFLow Power Radios 146-174 MHz CM200/CM300/PM400 Model ChartVHF2, 1-25 W, 146-174 MHz Model Description438-370 MHz CM200/CM300/PM400 Model Chart UHF2, 1-25 W, 438-470 MHzAAM50RNC9AA1A AAM50RNF9AA1ANSpecifications SpecificationGeneral ESDTransmitter ReceiverHigh Power Radios 136-162 MHz CM300 Model ChartVHF1, 25-45 W, 136-162 MHz VHF2, 25-45 W, 146-174 MHz438-470 MHz CM200/CM300/PM400 Model Chart UHF2, 25-40 W, 438-470 MHzAAM50RPC9AA1A AAM50RPF9AA1ANUHF3, 25-40 W 465-495 MHz 465-495 MHz PM400 Model ChartAAM50SPF9AA3AN VHF1 VHF2 UHF2 UHF3 35 ∝V @ 12.5 kHz ∝V @ 25 kHz MIL Standards MIL-STDGlossary of Terms Term DefinitionReset OSWPLL PTTVcobic VCOVswr This page Intentionally Left Blank Page 6802966C15