COMPONENT MAINTENANCE MANUAL
IN 1502H RADAR INDICATOR
TM109102
5-6
May/01
CAUTION:
ESDS DEVICES INCLUDE, BUT ARE NOT LIMITED TO, CMOS, JMOS,
PMOS, NMOS, SOCMOS, HMOS, MOSFET, MICROWAVE MIXER
DIODES, SOME BIPOLAR DEVICES AND SOME METAL FILM
RESISTORS.
(1) Storage
Store and transport all ESDS devices in conductive material. Do not insert ESDS
devices into conventional plastic “snow” or plastic trays used for storage and
transporting standard semiconductor devices. Special bags or containers must have a
maximum resistivity of 10
4
ohms/cm, or the leads of the device must be shorted
together through a conductive material (special foam) having a maximum resistivity of
10
4
ohms/cm.
Modules, circuit boards or assemblies containing ESDS devices must be stored in
static shielding bags with a maximum resistivity of 10
4
ohms/cm in the outer layer of
the bag and 10
12
ohms/cm resistivity in the inner layer.
A caution label shall be attached to the outside of all containers containing ESDS
devices. Do not remove devices from the container until actually used or tested.
(2) Work Station
All equipment, tools, materials and personnel at the work station must be maintained
at the same electrical potential. All grounding connections shall have a common point
and that point shall be connected to electrical ground.
Soldering irons shall be isolated from the power line by transformers or shall be direct
current isolated. The soldering iron must be grounded and have a resistance of less
than 0.2 ohm from the tip to ground when the iron is hot.
Test equipment shall have all exposed metallic surfaces electrically connected to the
test equipment power system ground (through 200 ohms or less).
Do not use rubber mats, carpets or rugs in the work station area. Use grounded
conductive mats.
Do not allow nonconductive items on the workbench. This includes such items as
plastic ash trays, cellophane wrappers, plastic tools, styrofoam cups, etc.
Maintain a relative humidity higher than 40 percent (minimum) in the work area.
Keep all material and work surfaces clean in the work area. Wash with damp cloth
when necessary.
Keep the work station static-safe. Periodically check the area with a static meter.
When a dangerous reading is observed, remove the nonconductor or take
precautions to prevent contact with ESDS devices.
The document reference is online, please check the correspondence between the online documentation and the printed version.
