Tektronix 1740A Series, User Manual

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Maintenance
1740A/1750A/1760 – Series Service Manual
6–3
Periodic checks of the transistors and integrated circuits are not recommended.
The best measure of performance is the actual operation of the component in the
circuit.
This instrument contains electrical components that are susceptible to damage
from static discharge. Static voltages 1 kV to 30 kV are common in unprotected
environments. Table 6–1 shows the relative static discharge susceptibility of
various semiconductor classes.
Table 6–1: Static Susceptibility
Relative Susceptibility Levels Voltage
2 ECL 200 V – 500 V
SCHOTTKY SIGNAL DIODES 250 V
SCHOTTKY TTL 500 V
HF BIPOLAR TRANSISTORS 400 to 600 V
JFETS 600 to 800 V
LINEAR CIRCUITS 400 to 1000 V est.
LOW POWER SCHOTTKY TTL 900 V
TTL 1200 V
Observe the following precautions to avoid damage:
1. Minimize handling of static-sensitive components.
2. Transport and store static-sensitive components or assemblies in their
original containers, on a metal rail, or on conductive foam. Label any
package that contains static-sensitive components or assemblies.
3. Discharge the static voltage from your body, by wearing a wrist
grounding strap, while handling these components. Servicing static-sensi-
tive assemblies or components should be done only at a static-free work
station by qualified personnel.
4. Nothing capable of generating or holding a static charge should be
allowed on the work station surface.
5. Keep the component leads shorted together whenever possible.
6. Pick up the components by the body, never by the leads.
7. Do not slide the components over any surface.
8. Avoid handling components in areas that have a floor or work surface
covering capable of generating a static charge.
Static-Sensitive
Components
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