Maintenance
6–4
TDS 200 Series Digital Oscilloscope Service Manual
Table 6–1: Internal inspection check list (cont.)
Item Repair actionInspect for
Circuit boards Loose, broken, or corroded
solder connections. Burned
circuit boards. Burned, broken,
or cracked circuit-run plating.
Remove failed module and replace with a
new module.
Solder connections Cold solder or rosin joints. Resolder joint and clean with isopropyl
alcohol.
Wiring and cables Loose plugs or connectors.
Burned, broken, or frayed
wiring.
Firmly seat connectors. Repair or replace
modules with defective wires or cables.
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.)
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 instrument
except the Display Module may be spray washed using a solution of 75%
isopropyl alcohol. 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. There is no periodic lubrication required for the oscilloscope.
To Next Page
Loading...
Need help?
General
