HP 70908A, Service Manual

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Preparing a Static-Safe W ork Station
Reducing ESD Damage
T o help reduce the amount of ESD damage that occurs during testing and servicing use the
following guidelines:
Be sure that all instruments are properly earth-grounded to prevent buildup of static charge .
P ersonnel should be grounded with a resistor-isolated wrist strap before touching the center
pin of any connector and before removing any assembly from a piece of equipment.
Use a resistor-isolated wrist strap that is connected to the HP 70000 Series modular spectrum
analyzer system mainframe's chassis . If you do not have a resistor-isolated wrist strap , touch
the chassis frequently to equalize any static charge .
Before connecting any coaxial cable to an instrument connector for the rst time each day ,
momentarily short the center and outer conductors of the cable together .
Handle all PC board assemblies and electronic components only at static-safe work stations .
Store or transport PC board assemblies and electronic components in static-shielding
containers .
PC board assembly edge-connector contacts may be cleaned by using a lintfree cloth with a
solution of 80% electronics-grade isopropyl alcohol and 20% deionized water . This procedure
should be performed at a static-safe work station.
Static-Safe ESD A ccessories
T able 4-1. Static-Safe ESD A ccessories
HP P art
Number
Description
9300-0797 Set includes: 3M static control mat 0.6 m 2 1.2 m (2 ft 2 4 ft) and 4.6 m
(15 ft) ground wire . (The wrist-strap and wrist-strap cord are not included.
They must be ordered separately .)
9300-0865 Ground wire , 4.6 m (15 ft)
9300-0980 Wrist-strap cord 1.5 m (5 ft)
9300-1367 Wrist-strap , color black, stainless steel, without cord, has four adjustable
links and a 7 mm post-type connection.
9300-1308 ESD heel-strap (reusable 6 to 12 months).
Order the above by calling HP DIRECT at (800) 538-8787 or through any Hewlett-P ackard
Sales and Service Oce .
T roubleshooting 4-3