Inspection and Cleaning
Maintenance
6Ć4
CAUTION
To prevent damage from electrical arcing, ensure that circuit
boards and components are dry before applying power to the oscilĆ
loscope.
TableĂ6Ć2:ăInternal Inspection Check List
Item
Inspect For Repair Action
Circuit boards Loose, broken, or corroded solder conĆ
nections. Burned circuit boards. Burned,
broken, or cracked circuitĆrun plating.
Resistors Burned, cracked, broken, or blistered
condition.
Solder connections Cold solder or rosin joints. Resolder joint and clean with isopropyl
alcohol.
Capacitors Damaged or leaking cases. Corroded
solder on leads or terminals.
Wiring and cables Loose plugs or connectors. Burned, broĆ
ken, or frayed wiring.
Firmly seat connectors. Repair or replace
modules with defective wires or cables.
Chassis Dents and deformations Straighten, repair, or replace chassis.
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 warm deionized water. (A cottonĆ
tipped applicator is useful for cleaning in narrow spaces and on circuit
boards.)
NOTE
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 3 through 7.
3. Gain access to the parts to be cleaned by removing easily accessible
shields and panels (see Removal and Replacement Procedures).
