I've been doing a lot of reading and am going to give this a shot. There was some good stuff about reflowing PB-Free BGA's here: http://www.altera.com/literature/an/an353.pdf
If anyone has their unit apart, can someone get some measurements for me first (I don't have my unit handy)? I want to buy a heat sink in case I am successful in my repair. Is the ST chip 35mm x 35mm? The specs were unclear. Also, what's the clearance between the chip and the top of the stereo's chassis?
Here was my plan... tell me if it sounds about right...
Budget is about $80
Tools and Parts:
-Heatgun from Harbor Freight ($14)
-Laser guided non-contact thermometer from Harbor Freight ($35)
-Non-clean flux (from ebay http://www.ebay.com/itm/No-Clean-Liq...-/270623217792
- hopefully it's not just a bottle of water... about $3.50 delivered)
-Paper towels and some masking tape (on hand)
-level (have one on hand already)
-BGA chip heat sink with thermal tape (like http://search.digikey.com/us/en/prod...125-ND/1284839
- about $15 with shipping)
1) Find a good level surface, cover with foil to protect it.
2) Tape an "L" of rolled up paper towels around two sides of the chip to catch the flux as it flows through.
3) Lift board to a 45 degree angle, pour flux along top side until it starts to flow through. Rock board back and forth so flux covers inside the BGA.
4) Rotate board 90 degrees, repeat step 3.
5) Remove paper towels and tape, clean up excess flux.
6) Place board flat and pre-heat entire board to 300F for 2 minutes
7) Heat BGA chip to 460F for 2 minutes
8) Remove heat and let cool for 20 minutes
10) If working, apply heat sink.
Test for a few weeks and then sell on CL - buy non Onkyo receiver.