NAND-X QSB max temps

[Atlantisch]

So, first post and all. I have a xenon motherboard that I've jtagged, all that went well and everything. This motherboard was recovered from 0102 RROD. It started acting up on me again and sometimes throwing out the 0102. I need to reflow the GPU again. I'm trying to determine if I need to remove the JTAG QSB before reflowing the GPU, or if they will withstand the heat.

I'm not really worried about the boards themselves being damaged, or even the solder melting in that area. I am worried about the plastic connectors though. I just need to know what the max thermal tolerance of them is so that I can make a decision to leave or remove them. I've had a lot of problems from reflowing boards with the blue buttons. They like to melt, the black ones don't. Just tyring to figure out what temperature these plastic connectors would fail at.

Thanks for any help.

 

[BGAMods]

nothing should melt when reflowing. what are you using to reflow?

 

[marshamods]

Are you heat gunning

 

[Atlantisch]

I've got an Aoyue 968 rework station with nozzle, using a modified presto griddle for the base heater. The xbox 360 board gets to ~ 150C with just the griddle on after about 10-15 mins. I expect the area with the JTAG QSB would get up to maybe 170 or 180 with the heat from the rework station.

I should note that the ONLY thing I have had problems with melting is the controller sync button. And only the blue ones. The board is about 3/4 of an inch above the griddle when I'm doing this. I know I could cut the bottom heater down a bit and it probably wouldn't be an issue. It's more the fact that the JTAG QSB is closer in proximity to the GPU that worries me a bit.

 

[BGAMods]

i use an achi and ive never had an issue. you could always cover the qsb with kapton tape to try and decrease the hot air getting to them, or just remove the qsb during reflow although like i say, ive never bothered to remove a qsb and have never had an issue.

 

[Atlantisch]

I may have some Kapton tape at home. Good to know that you've reflowed with them still on and had no problems. Thanks for the quick reply!