MAINTENANCESTANDARD PREVENTIVE MAINTENANCE PROCEDURESI-E96-192-5A 5 - 5CLEANING EDGE CONNECTORTo clean edge connector contacts:1. Use a solvent mixture of 80% isopropyl alcohol (99.5%electronic grade) and 20% percent 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 solventmixture.5. Dry the edge connector contact area by wiping with a cleanlint-free cloth.To clean tarnished or deeply stained edge connector contacts:1. Use an Eberhard Faber (400A) pink pearl eraser, or equiva-lent to remove tarnish or stains. Fiberglass or nylon burnish-ing brushes may be used also.2. Minimize electrostatic discharge by using the 80% to 20%isopropyl alcohol to water solution during burnishing.3. Do not use excessive force while burnishing. Use onlyenough force to shine the contact surface. Inspect the edgeconnector after cleaning to assure no loss of contact surface.CLEANING FEMALE EDGE CONNECTORSTo clean the contacts on a female edge connector:1. Use a foam tipped swab or a lint-free cloth wrapped over apiece of scrap circuit board. Soak the swab or cloth in elec-tronic grade isopropyl alcohol.2. Insert the swab of cloth covered circuit board into edgeconnector and work it back and forth to clean the contacts.3. Rinse the edge connector contacts by spraying with isopro-pyl alcohol.4. Remove excess alcohol and dry using compressed air.Checking Power Supply OutputsTo check modular power supply outputs on the power entrypanel, refer to the AC and DC power tests in Section 4.
