User Guide

4
BGAREBALLINGWITHSOLDERBALLS
BGAPlacement:
1. BGAmaynowbeplacedonthelowermodule.
2. AdjusttheBGAholdersothattheBGAi satthecenteroftheLower
module.
3. LocktheBGAholderandsecuringscrewstightly.
4. AthinfilmoftackyfluxmaynowbeappliedtotheBGA.Itisimpor
tantthatthefluxbeofstickycharacteristicsothesolderballswould
sticktotheBGA.
5. Attachtheuppermoduletothelowermodule.
UppermoduleBGAstencilclampdetachment:
1. ToplacetheBGAstencil,wemustfirstdetachthestencilclamp.
2. Loosenthefourscrewsthatattachestheclamptotheuppermodule.
3. Pulluptheclamp.
TightenSecuring
locks
PlaceBGAon
thecenter
Loosenscrews
LiftupBGAstencil
clamp
5
BGAREBALLINGWITHSOLDERBALLS
BGAStencilPlacementandAdjustment:
1. PlacetheBGAstencilsuchthattheholesmatchthatoftheBGA.
2. SecuretheBGAstencilbyplacingtheclampontopofit.
3. Slightly tighten the screws but allow enough space such that slight
adjustmenttothestencilcanstillbemade.
4. Slowlyadjustthestencilsuchthatitspositionisanexactmatchtothe
BGAbelow.
5. Locktheclampscrewstightly.
Slightlytighten
TightenSecurely
Adjustto
Match