Re: HP Dv6800 Southbridge reflow /Optical Drive detection
Contrary to many opinions that is not a bga rework station, IT IS an smt rework station ie ceramic caps, resistors etc;
This is a BGA rework station http://www.youtube.com/watch?v=kDTrS7wDyNE
I skimmed through the thread and i understand that the laptop worked but then failed. This mean that the solder balls did not full melt or not at all and the board was simply BAKED this caused the board to flex thus causing a temporary connection.
The solder needs to reach a temp of at least 240c to achieve proper melting and should be held for at least 30 sec, failure to follow these procedures will result in a temporary repair. It may last a few hrs, wks, mths but the problem WILL RETURN.
Most machines do come with k type thermo couples, however it is recommended to not use it and get an omega thermocouple as they provide much better results.
Lets say you are at 240c according to your probe, you may be at 250c which means bye bye chip. You may also think your at 240c and be at 220c, which is enough to start ball melting but not provide full liquification so it will stop working soon.
Contrary to many opinions that is not a bga rework station, IT IS an smt rework station ie ceramic caps, resistors etc;
This is a BGA rework station http://www.youtube.com/watch?v=kDTrS7wDyNE
I skimmed through the thread and i understand that the laptop worked but then failed. This mean that the solder balls did not full melt or not at all and the board was simply BAKED this caused the board to flex thus causing a temporary connection.
The solder needs to reach a temp of at least 240c to achieve proper melting and should be held for at least 30 sec, failure to follow these procedures will result in a temporary repair. It may last a few hrs, wks, mths but the problem WILL RETURN.
Most machines do come with k type thermo couples, however it is recommended to not use it and get an omega thermocouple as they provide much better results.
Lets say you are at 240c according to your probe, you may be at 250c which means bye bye chip. You may also think your at 240c and be at 220c, which is enough to start ball melting but not provide full liquification so it will stop working soon.
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