Motorola HT 1000 service manual Disassembly and Reassembly, This Radio Contains STATIC-SENSITIVE

Disassembly and Reassembly

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THIS RADIO CONTAINS STATIC-SENSITIVE

!PROPERLY GROUNDED. TAKE THE FOLLOWING PRECAUTIONS WHEN WORKING ON THIS UNIT.DEVICES. DO NOT OPEN THE RADIO UNLESS

C a u t i o n

1.Store and transport all complementary metal- oxide semiconductor (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.

2.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.

3.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 RSX-4015.

4.Do not wear nylon clothing while handling CMOS devices.

5.Neither insert nor remove CMOS devices with power applied. Check all power supplies that are to be used for testing CMOS devices to be certain that there are no voltage transients present.

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

7.When soldering, use a grounded soldering iron.

8.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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