Tektronix TPS2000 Series, Руководство по обслуживанию

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Maintenance
6--4
TPS2000 Series Digital Storage Oscilloscopes Service Manual
Cleaning Procedure, Interior. To clean the oscilloscope interior, perform the
following steps:
1.
Blow off dust with dry, low-pressure, deionized air (approximately 9 psi).
2.
Remove any remaining dust with a lint-free cloth dampened in isopropyl
alcohol (75% solution) and then wipe with a lint-free cloth dampened with
warm deionized water. A cotton-tipped applicator is useful for cleaning in
narrow spaces and on circuit boards.
STOP
. If, after performing steps 1 and 2, a module is clean upon inspection, skip
steps 3 and 4. Proceed with step 5.
If steps 1 and 2 do not remove all the dust or dirt, all modules in the oscilloscope
except the Display Module and Front Panel Module may be spray washed using
a solution of 75% isopropyl alcohol.
Extensive cleaning of the Display Module is difficult because water must not be
trapped between the display shield and the display. The polarizers integrated into
the display degrade with long-term exposure to water. The display shield and
display must be replaced as an assembly if significant moisture or debris become
trapped inside. Cotton tipped applicators and lint-free rags moistened in
isopropyl alcohol and/or deionized water offer the best cleaning with the least
opportunity for damage to the assembly.
The Front Panel Module can be damaged by deposition of film or debris inside
the knob encoders. To avoid this, care must be taken to not drip liquid or blow
debris into the encoders.
Proceed with step 3.
3.
Spray wash dirty parts with the 75% isopropyl alcohol solution and wait 60
seconds for the majority of the alcohol to evaporate.
4.
Use hot (49
_
C to 60
_
C / 120
_
F to 140
_
F) deionized water to thoroughly
rinse the parts.
5.
Dry all parts with low-pressure, deionized air.
6.
Dry all components and assemblies in an oven or drying compartment using
low-temperature (52
_
C to 66
_
C / 125
_
F to 150
_
F) circulating air.
Lubrication.
Periodic lubrication is not required for the oscilloscope.