Cyrus CD T - Fitting Replacement Ics to the PCB with a Soldering Iron; Removing SMD Ics with a Hot Air SMD Tool; Removing SMD Ics from the PCB

SMDCOMPONENTREPLACEMENT
©CyrusAudioLtdJun2014 3 CDtServiceManualIssue1
 Whenusingsolderpasteapressuredispensershouldbeusedtoensurethecorrectamount
ofsolderisappliedtoeachpad.
 Solder paste should not be used with direct heating methods as the solder between
componentpinsmaynotbemelted.
 Ifnecessary,removeexcesssolderpastewithsolderbraid.
RemovingSMDresistorsandcapacitorsfromthePCBwithasolderingiron
1. Fitthesolderingironwithatiplargeenoughtobridgebothendsofthecomponent.
2. Placethesolderingironsothatitsflattipwillheatbothendsofthecomponentatonce.
3. Whenthesoldermelts,removethecomponentwithtweezers.
4. Allow the PCB to cool for a few minutes, removing any excess solder with desoldering
braid.
FittingreplacementSMDresistorsandcapacitorstothePCBwithasolderingiron
1. Applyalittlefluxtotheconnections.
2. Placethecomponentinposition.
3. Tin the soldering iron, bring the tip into contact with the PCB pad and flow solder to the
joint.Avoidbringingthesolderingirontipdirectlyintocontactwiththecomponent.
RemovingSMDICsfromthePCB
1. Using fine tipped side cutters or tweezer cutters, snip all the leads of the device and
removetheICbody.
2. DesoldertheleadsfromthePCBpads.
3. CleanupthePCBwithsolderbraid.
RemovingSMDICswithahotairSMDtool
1. FitasuitablesizetipfortheICbeingremoved.
2. HeattheICevenlyuntilthesoldermelts.
3. RemovetheICwithtweezers.
FittingreplacementICstothePCBwithasolderingiron

1. CheckthatthepinsoftheICarenotdistorted.
2. Usingtweezers,positiontheICoverthefootprint.
3. CheckthatalltheICpinsarecorrectlyalignedwiththepads.
4. Withaveryfinetipsolderingiron,solderinthepinsatthecornersofthe
IC.
5. Re‐checkthealignmentandcorrectifnecessary.
6. WhenthealignmentisOK,soldertheremainingpinsoftheICtothePCB.
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