IFR FM/AM-500, Maintenance Manual

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INTEGRATED CIRCUITS AND SOLID STATE DEVICES SUCH
AS MOS FET'S, ESPECIALLY CMOS TYPES, ARE SUS­
CEPTIBLE TO DAMAGE BY ELECTROSTATIC DISCHARGES
RECEIVED FROM IMPROPER HANDLING, THE USE OF
UNGROUNDED TOOLS, AND IMPROPER STORAGE AND
PACKAGING. ANY MAINTENANCE TO THIS UNIT MUST
BE PERFORMED WITH THE FOLLOWING PRECAUTIONS:
1. BEFORE USING IN A CIRCUIT, KEEP ALL LEADS
SHORTED TOGETHER EITHER BY THE USE OF
VENDOR-SUPPLIED SHORTING SPRINGS OR BY
INSERTING LEADS INTO A CONDUCTIVE MATERIAL.
2. WHEN REMOVING DEVICES FROM THEIR CONTAINERS,
GROUND THE HAND BEING USED WITH A CONDUC­
TIVE WRISTBAND.
3. TIPS OF SOLDERING IRONS AND/OR ANY TOOLS
USED MUST BE GROUNDED.
4. DEVICES MUST NEVER BE INSERTED INTO NOR
REMOVED FROM CIRCUITS WITH POWER ON.
5. PC BOARD, WHEN TAKEN OUT OF THE SET, MUST
BE LAID ON A GROUNDED CONDUCTIVE MAT OR
STORED IN A CONDUCTIVE STORAGE BAG.
Remove any built-in power source, such
as a battery, before laying PC Boards
on conductive mat or storing in con­
ductive bag.
6. PC BOARDS, IF BEING SHIPPED TO THE FACTORY
FOR REPAIR, MUST BE PACKAGED IN A CONDUC­
TIVE BAG AND PLACED IN A WELL-CUSHIONED
SHIPPING BOX.
THE USE OF SIGNAL GENERATORS FOR MAINTENANCE
AND OTHER ACTIVITIES CAN BE A SOURCE OF ELECTRO­
MAGNETIC INTERFERENCE TO COMMUNICATION RECEIVERS,
WHICH CAN CAUSE DISRUPTION AND INTERFERENCE TO
COMMUNICATION SERVICE OUT TO A DISTANCE OF SEV­
ERAL MILES.
USERS OF THIS EQUIPMENT SHOULD SCRUTINIZE ANY
OPERATION WHICH RESULTS IN RADIATION OF A SIG­
NAL (DIRECTLY OR INDIRECTLY) AND SHOULD TAKE
NECESSARY PRECAUTIONS TO AVOID POTENTIAL COM­
MUNICATION INTERFERENCE PROBLEMS.