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Inspection and Cleaning
TAS 455 and TAS 465 Service Manual
6Ć7
Cleaning Procedure Ċ Interior
If, after doing steps 1 and 2, a module is clean upon inspection, skip
the remaining steps.
1. Blow off dust with dry, lowĆpressure, deionized air (approximately 9 psi).
2. Remove any remaining dust with a lint free cloth dampened in isopropyl
alcohol (75% solution) and rinse with a warm deionized water. (A
cottonĆtipped applicator is useful for cleaning in narrow spaces and on
circuit boards.)
3. If steps 1 and 2 do not remove all the dust or dirt, the oscilloscope may
be spray washed using a solution of 75% isopropyl alcohol by doing
steps 4 through 8.
4. Gain access to the parts to be cleaned by removing easily accessible
shields and panels (see Removal and Installation Procedures).
5. Spray wash dirty parts with the isopropyl alcohol solution and wait
60 seconds for the majority of the alcohol to evaporate.
6. Use hot (+50_ĂC to +60_ĂC) deionized water to thoroughly rinse them.
7. Dry all parts with lowĆpressure, deionized air.
8. Dry all components and assemblies in an oven or drying compartment
using lowĆtemperature (+50_ĂC to +60_ĂC) circulating air.
Cleaning the CRT Implosion Shield
This procedure describes how to clean both sides of the CRT ImploĆ
sion Shield, thus requiring its removal. Perform this procedure only if
cleaning the backside of the Implosion Shield is necessary.
1. Remove the Implosion Shield as described in the removal and replaceĆ
ment procedures beginning on page 6Ć28.
2. Clean the shield with a lint free cloth dampened in a general purpose
detergentĆandĆwater solution. Do not use abrasive cleaners.
3. Remove any static charge that may have accumulated by holding the
shield in a deionized air flow.
4. Install the shield as described in the removal and replacement proceĆ
dures beginning on page 6Ć28.