General Cleaning And Washing; Edge Connector Cleaning - ABB Symphony Harmony Series Instruction

WARNING

General Cleaning and Washing

Edge Connector Cleaning

WBPEEUI240767B0
Never clean electrical parts or components with live power
present. Doing so exposes you to an electrical shock hazard.
Wear eye protection whenever working with cleaning solvents.
When removing solvents from printed circuit boards using
compressed air, injury to the eyes could result from splashing
solvent as it is removed from the printed circuit board.
If the printed circuit board needs minor cleaning, remove dust
and residue from the printed circuit board surface using clean,
dry, filtered compressed air or an antistatic field service vac-
uum cleaner.
To wash the printed circuit board:
1. Clean the printed circuit board by spraying or wiping it
with isopropyl alcohol (99.5% electronic grade). Use a foam-
tipped swab to wipe the circuit board.
2. Remove excess solvent by using compressed air to blow it
free of the circuit board.
1. Use a solvent mixture of 80% isopropyl alcohol (99.5%
electronic grade) and 20% distilled water.
2. Soak a lint-free cloth with the solvent mixture.
3. Work the cloth back and forth parallel to the edge connec-
tor contacts.
4. Repeat with a clean cloth that is soaked with the solvent
mixture.
5. Dry the edge connector contact area by wiping with a clean
lint-free cloth.
To clean tarnished or deeply stained edge connector contacts:
1. Use a nonabrasive eraser to remove tarnish or stains.
Fiberglass or nylon burnishing brushes may also be used.
2. Minimize electrostatic discharge by using the 80/20 iso-
propyl alcohol/water solution during burnishing.
Preventive Maintenance Procedures
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