Maintenance & Inspection Guide Edge 400A Series - Johnstech

Edge 400a SeriesContactor/Component InspectionContact InspectionContacts have a recommended lifespan of 500,000 insertions*.If you know that the Contacts have run their recommendedlifespan, Yields start falling off and cleaning doesn’t help,or you can see that wear exceeds 0.10mm, replace with newContacts. Using a microscope, inspect Contacts for:Figure 14: Example ofScratched Contacts; replace• Scratches/Scars (see Figure 14)• Gouges (see Figure 15, 16)• Wear (see Figure 16)• Distorted Shape (see Figure 17)Figure 15: Example of GougedContacts; replaceThe kind of damage listed above and shown in the correspondingphotos is usually caused by non-parallel or offset Modulepresentation in the X- & Y-position, or both (refer to Page16 for more information on Module Presentation and X- &Y-positioning); or the Module is wider than or warped beyondJEDEC specifications (refer to Page 16 for more informationon this). It is also recommended that you discard the usedContacts and replace with new ones.• FR-4 or other Debris Buildup (see Figure 18)Figure 16: Profiles of Wornand Gouged Contacts; replaceDebris buildup usually happens when a Contactor has gone toolong without cleaning, the Module insertion is off or it is toowide or warped. Start with a Thorough Cleaning (procedureis given on Page 19) and check if there is damage to otherComponents. If so, the Handler presentation of the Modulemay need to be adjusted.Figure 17: Example of DistortedContact ShapeFigure 18: Example of DebrisBuildup; cleanwww.johnstech.com©2009 Johnstech International CorporationAll rights reserved.14* Life Cycle specifications can vary based on any number of variables.