Tektronix MSO70000 Series Service Manual page 49

MSO70000/C, DSA70000B/C, DPO70000B/C, DPO7000, MSO5000, DPO5000 Series
Cleaning Procedure – Interior. To clean the instrument 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 rinse with warm deionized water. (A cotton-tipped
applicator is useful for cleaning in narrow spaces and on circuit boards).
NOTE.
If, after doing steps 1 and 2, a module is clean upon inspection, skip the
remaining steps.
3. If steps 1 and 2 do not remove all the dust or dirt, the instrument 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 page 4-7, Removal and Installation Overview.)
5. Spray wash dirty parts with the isopropyl alcohol and wait 60 seconds for the
majority of the alcohol to evaporate.
6. Use hot (120 °F to 140 °F) deionized water to thoroughly rinse them.
7. Dry all parts with low-pressure, deionized air.
8. Dry all components and assemblies in an oven or drying compartment using
low-temperature (125 °F to 150 °F) circulating air.
Lubrication. There is no periodic lubrication required for this instrument.
Maintenance
4–5