COMPONENT MAINTENANCE MANUAL
IN 1502H RADAR INDICATOR
TM109102
5-7
May/01
(3) Personnel
When handling electrostatic discharge sensitive devices or assemblies, wear a
skin-contact wrist strap connected to the work station common ground.
WARNING: DO NOT CONNECT PERSONNEL DIRECTLY TO EARTH OR
BUILDING GROUND. COMMERCIAL GROUNDING STRAPS
CONTAIN AN INTERNAL RESISTANCE OF ABOUT 1 MEGOHM IN
THE CORD TO BLEED THE ELECTROSTATIC CHARGE FROM THE
BODY WHILE PROTECTING PERSONNEL FROM ELECTRICAL
SHOCK.
WARNING: DO NOT WEAR A GROUND STRAP WHEN TROUBLESHOOTING OR
TESTING HIGH VOLTAGE CIRCUITS WITH POWER APPLIED.
Do not wear smocks, gloves, finger cots or sleeve protectors made of plastic, nylon or
rubber in the area where ESDS devices are handled.
When the operator is properly grounded, contact with the hand of the operator will
provide sufficient ground for hand tools or other tools that may be electrically isolated
from ground.
(4) Special Troubleshooting Precautions
In addition to the above considerations, the following specific precautions should be
observed when troubleshooting or repairing modules containing ESDS devices.
Do not use high velocity dry air for applying heat during troubleshooting. Special
infrared heat devices should be used.
Do not use Freon spray during troubleshooting. To cool components, use antistatic
quick-chill sprays.
Remember, even when the ESDS device is installed on a printed circuit board it can
still be damaged by electrostatic discharge.
C. General Repair and Replacement Procedures
(1) The repair or replacement of worn, damaged or defective parts involves standard
repair techniques.
(2) Make a wiring diagram or sketch before removing any part requiring unsoldering of
several lead wires. Show color coding or wire marking and the approximate location
and identity of the terminals to which the wires are connected. Also, show where
lacing is removed or where dress is important.
(3) Whenever maintenance is performed on the chassis cabling, make continuity checks
throughout the cable to check that the cable is still wired correctly. Refer to the
schematic diagrams in section VI of this book, the Parts List.
The document reference is online, please check the correspondence between the online documentation and the printed version.
