Tektronix TLA Series, Руководство по обслуживанию

Страница: 81 / 130

Maintenance
TLA Series Digitizing Oscilloscope Modules Service Manual
6- 3
Preventive maintenance consists of visually inspecting and cleaning the DSO
module, and using general care when operating it. How often to do maintenance
depends on the severity of the environment in which the DSO module is used. A
proper time to perform preventive maintenance is just before adjustment of the
DSO module.
The side cover keeps dust out of the DSO module and should be in place during
normal operation.
Inspect and clean the DSO module as often as operating conditions require. The
collection of dirt on internal components can cause them to overheat and
breakdown. Dirt acts as an insulating blanket, preventing efficient heat dissipa-
tion. Dirt also provides an electrical conduction path that could cause a DSO
module failure, especially under high-humidity conditions.
CAUTION.
Avoid the use of chemical cleaning agents that might damage the
plastics and external labels used in the DSO module.
Use a cloth dampened with water to clean external surfaces.
To clean internal surfaces, use a 75% isopropyl alcohol solution as a cleaner
and rinse with deionized water.
Before using any other type of cleaner, consult your Tektronix Service Center or
representative.
Inspection — Exterior. Inspect the outside of the DSO module for damage, wear,
and missing parts. Use Table 6--1 as a guide. Instruments that appear to have
been dropped or otherwise abused should be checked thoroughly to verify correct
operation and performance. Immediately repair defects that could cause personal
injury or lead to further damage to the DSO module or the mainframe in which it
is used.
General Care
Inspection and Cleaning
Procedures