Tektronix DSA8300 Service Manual page 52

Maintenance
Interior Cleaning
Lubrication
4–4
Internal inspection checklist
Item
Circuit boards
Resistors
Capacitors
Wiring and cables
Chassis
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 performing steps 1 and 2, an assembly is clean upon inspection,
skip the remaining steps.
3. Gain access to the parts to be cleaned by removing easily accessible shields
and panels. (See page 4-5, Removal and Installation.)
4. Spray wash dirty parts with the isopropyl alcohol and wait 60 seconds for the
majority of the alcohol to evaporate.
5. Use hot (120 °F to 140 °F) deionized water to thoroughly rinse them.
6. Dry all parts with low-pressure, deionized air.
7. Dry all components and assemblies in an oven or drying compartment using
low-temperature (125 °F to 150 °F) circulating air.
There is no periodic lubrication required for this instrument.
DSA8300 Digital Serial Analyzer and Modules Service Manual
Inspect for
Loose, broken, or corroded solder
connections. Burned circuit
boards. Burned, broken, or
cracked circuit-run plating.
Burned, cracked, broken, blistered
condition.
Damaged or leaking cases.
Corroded solder on leads or
terminals.
Loose plugs or connectors.
Burned, broken, or frayed wiring.
Dents, deformations, and
damaged hardware.
Repair action
Remove and replace
damaged circuit board.
Remove and replace
damaged circuit board.
Remove and replace
damaged circuit board.
Firmly seat connectors.
Repair or replace
modules with defective
wires or cables.
Straighten, repair,
or replace defective
hardware.