Maintenance & Inspection Guide - Johnstech

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Pad ROL 100ACONTACT & ELASTOMER REMOVALContact & Elastomer Removal InstructionsCAUTION: Avoid putting pressure on slot walls and webs by not resting hands ortools in these areas while working on the contactor (see Figures 10 & 11).Figure 10: Slot walls.Figure 11: Slot webs.Step 1: Remove Inner/Front Elastomer• Turn contactor over so load board side faces up.• Use a tweezers to pull out the inner/front (green) elastomer from the contactor (see Figure 12).• Inspect elastomer to determine whether they can be reused or will need to be discarded.Step 2: Remove Contacts• With contactor still load board side up, use a tweezers to carefully pull contact out of housing (seeFigure 13).• Many people find it easiest to start at one corner and work your way around the contactor, butremoval order is unimportant.• Inspect contacts to determine if they need to be discarded or can be reused.• If your intent is to just change out the elastomers and reuse the contacts, take extra care in theremoval process.• Do not squeeze or bend them and do not touch the tips, which can affect performance.• Either discard worn contacts or set aside for reassembly.Step 3: Remove Outer/Back Elastomer• As in Step 1 above, use a tweezers to pull out the outer/back (red) elastomer (see Figure 14).• Inspect for signs of wear per instructions on Page 12 and either set aside for reinstallation ordiscard.NOTE: It is recommended to just discard used elastomers and assemble contactorwith new ones, but if they are in exceptionally good shape, they can be set asideand reinstalled. Blow with compressed air before reinstalling.Figure 12: Removal of inner/front (green) elastomer.Figure 13: Contact removal.Figure 14: Removal of outer/back (red) elastomer.14www.johnstech.com©2012 <strong>Johnstech</strong> International CorporationAll rights reserved.
Pad ROL 100ACONTACTOR CLEANINGIf debris buildup is observable upon inspection of the contactor or you experience adrop in yields or an increase in resistance, follow the Light Cleaning Procedure onthis page.Note: A fiberglass brush is always recommend best for contactor cleaning but ifyou don’t have or are not allowed to use a fiberglass brush, a nylon brush may beused as a substitute.Figure 15: Separating housingand alignment plate.Light Cleaning ProcedureStep 1: Remove Contactor from Load Board• Refer to instructions on Page 13, Step 1.Step 2: Remove Alignment Plate• Use a scalpel to gently pry apart the housing and alignment plate, working in an even andincremental manner around the housing to avoid binding (see Figure 15).Step 3: Brush the Top Side of Contactor• Mount contactor to the acrylic mounting plate.• Use a fiberglass (or nylon) brush to gently clean both the perimeter and ground (even if in aground insert) contact tips, brushing from the outside in, toward the center of the contactor (seeFigure 16).Figure 16: Correct direction forcontact brushing on the top sideof the contactor.Step 4: Brush the Bottom Side of Contactor• Remove contactor from the acrylic mounting plate and turn over so the load board side is up.• Use the fiberglass (or nylon) brush again to gently clean both the perimeter and ground (even if ina ground insert) contact bottoms.• This time brush from the center of the contactor outward (see Figure 17).• Avoid brushing elastomers.Step 5: Clear DebrisRemove any loose debris from the Contactor using one or both of these methods:• Dry, clean Compressed Air (20psi or less) (see Figure 18).• A small vacuum.Figure 17: Correct direction forcontact brushing on the bottomside of the contactor.Be sure to thoroughly clear debris from every part of the contactor, including theelastomer and contact slots. If no loose debris remains, the contactor may bereassembled and reinstalled.NOTE: If remaining debris or foreign matter is observed, even after performing thisLight Cleaning Procedure, try the Thorough Cleaning Procedure on the next page.Step 6: Clean Handler• Clean the handler per the manufacturer’s recommendations.Step 7: Reinstall Contactor• If no loose debris remains on the contactor, remount it to the load board per the instructions onPage 13, Step 4.Figure 18: Compressed aircleaning.www.johnstech.com©2012 <strong>Johnstech</strong> International CorporationAll rights reserved.15
Page 1 and 2: PAD SERIES TEST CONTACTORPad ROL 1
Page 3 and 4: Pad ROL 100ASTANDARD PRODUCT INFOR
Page 5: Pad ROL 100ACONTACTOR INDENTIFICAT
Page 8 and 9: Pad ROL 100ACLEANING & MAINTENANCE
Page 10: Pad ROL 100APRE-MAINTENANCE TROUBL
Page 13: Pad ROL 100ACONTRACTOR REMOVAL AND
Page 17 and 18: Pad ROL 100ACONTACTOR CLEANINGStep
Page 19 and 20: Pad ROL 100ACONTACT INSTALLATIONCo
Page 21 and 22: Pad ROL 100AGROUNDING SOLUTIONSThe
Page 23 and 24: Pad ROL 100AGROUND INSERT INSTALLA
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