Maintenance & Inspection Guide - Johnstech

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Pad ROL 100AHOUSING, ELASTOMER & CONTACT INSPECTIONHousing InspectionIn order to inspect the housing, elastomers and contacts, the contactor must beremoved from the load board and disassembled. Refer to instructions on Pages13-14.Figure 5: Acceptable contactwipe on pad (Matte Tin).Pad ROL 100A Series Housings have a recommended lifespan of 1 millioninsertions. Take the dismounted/disassembled contactor and using a minimumof 10X magnification, inspect the Housing for signs tail stop wear. If the tail stopdepth exceeds 0.05mm (see Figure 4), replace the housing. Conversely, if thecontact wipe on the device pad is not placed correctly (see Figure 5), check thealignment plate walls and opening and tail stop wall for wear. If observed, replacethe alignment plate.Figure 6: Example of cutelastomer; needs to be replaced.Elastomer InspectionUsing 10X+ magnification, inspect elastomers for signs of:• Cuts or tears• Compression set• Stretched sectionsUpon inspection, if you see excessively cut or torn elastomers (see Figure 6), or ifthe compression set exceeds 0.05mm (see Figure 7), replace elastomers to regainoptimum performance.Figure 7: Example ofcompression set; this elastomerneeds to be replaced.Figure 8: Example of oxidebuildup on contact tip (photo isfrom a test on Matte Tin).Contact InspectionUsing 10X+ magnification, inspect contacts for signs of:• Worn Tips• Scratches or markings• Oxide buildup (see Figure 8)• Debris buildup• Compressed/distorted shapeIf any of the above are observed, discard used contacts and replace with newones.Oxide BuildupThe self-cleaning wipe-action of ROL Technology is designed to greatly reducethe amount of oxide buildup on contacts. However, some oxide buildup will occurif contactors are unused for 2 or more days, appearing dull gray in color (see Figure8). A light brushing or a few device insertions will typically remove the oxide barrierand expose a shiny surface. Clean the contactor after prolonged downtime or ifyou experience a decrease in yields. Refer to Cleaning Procedures on Pages 15-16.NOTE: If contacts have significant/excessive oxide buildup, check all componentsin test cell to ensure that device alignment and plunge depth are correct.12www.johnstech.com©2012 Johnstech International CorporationAll rights reserved.
Pad ROL 100ACONTRACTOR REMOVAL AND INSTALLATIONContactor Removal & Installation InstructionsIt is recommended that you remove your Pad ROL 100A Series Contactor fromthe load board before performing any component inspection, cleaning and/ormaintenance.Step 1: Remove Contactor• Start removal of the contactor from the load board by loosening the fasteners. While carefully liftingcontactor from load board, use a microscope to see if contacts or ground Insert are sticking to themounting surface.• If either is sticking, apply several drops of Isopropyl Alcohol through contact slots and allow it tosoak for two minutes before lifting from load board.• Remove the fasteners and once contactor is removed, inspect it for any loose ormissing contacts.• Mount the contactor to the acrylic mounting plate for storage.Step 2: Perform Maintenance & Cleaning• Perform the maintenance and cleaning per the instructions contained on the following pages.Step 3: Clean Load Board• Before remounting the contactor to the load board, ensure that no debris is present in theinterface areas.• If necessary, use compressed air and/or Isopropyl Alcohol with a clean lint-free cloth to carefullywipe the bottom of the contactor and the surface of the load board clean.NOTE: NEVER use Acetone or other solvents.Figure 9: Screw tighteningpattern.RecommendedTorque Valuesin.-lb. Nm0-80 1.0 0.112-56 2.0 0.234-40 5.0 0.56M1.4 x 0.3 0.4 0.04M1.6 x 0.35 0.6 0.06M2 x 0.40 1.3 0.15M2.5 x 0.45 2.5 0.28M3 x 0.5 4.5 0.51M4 x 0.7 8.0 0.90Step 4: Install Contactor• Refer to the load board drawing that was sent with either your quote or order for proper footprintlayout.• Fasten the contactor to the load board by fitting the screws through the contactor and engagingseveral threads.• Under a microscope or 10X Eye Loupe, inspect the contact tips for alignment. Misalignedcontacts can damage the alignment plate, housing and load board.• Use the elastomer tool to realign contacts where necessary.• Evenly tighten the fasteners in a crisscross pattern (see Figure 9).• To avoid damage to the contactor or threaded inserts in the load board, the contactor mountingscrews should be tightened, according to the Recommended Torque Values in the table at left.Step 5: Verify Contacts• Verify that all contacts are properly positioned.• Gently actuate all of the contacts with an elastomer tool to ensure proper contact motion.Step 6: Verify Test Set-up• Verify the Device-to-Contactor alignment and handler plunge depth, as well as the X-Ypresentation.www.johnstech.com©2012 Johnstech International CorporationAll rights reserved.13
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 15 and 16: Pad ROL 100ACONTACTOR CLEANINGIf d
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
Page 25: Pad ROL 100AWorldwide Headquarters

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