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Falcon Dallas NVRAM chip desoldering - is a Hakko "safe"?


2 replies to this topic

#1 oracle_jedi OFFLINE  

oracle_jedi

    Moonsweeper

  • 391 posts
  • Nothing to Declare
  • Location:Seattle, WA

Posted Thu Oct 26, 2017 9:58 AM

Both my Falcons have dead NVRAM chips, no big surprise there.

 

I've read that removing them is a PITA, and that typical soldering iron+solderpult approach will likely destroy traces and possibly the whole Falcon.

 

I've also seen the "cut the chip away from the top" approach, which seems to me a risky way to make a huge mess too.

 

How safe is a Hakko desoldering station?  It seems pretty gentle on the vacuum and has variable heat settings from 400F to 750F, would this be a better option to desolder the Dallas chip from the underside and then use a plastic screwdriver to lever the chip off?

 

 

 

 



#2 Keatah ONLINE  

Keatah

    Quadrunner

  • 18,932 posts

Posted Thu Oct 26, 2017 11:29 AM

Hakko, Met-Cal, Harbor-Freight.. Whatever.. Thing is to be sure the tool-tip is grounded, properly sized, and has good heat capacity/reserve. It would take a lot of vacuum power to suck the traces off the board, so that isn't an issue.

 

It appears to be a standard DIP package, so no special tricks unless I'm missing something completely. I speak as an engineer seeing this as any other desoldering job.



#3 anzac OFFLINE  

anzac

    Chopper Commander

  • 136 posts
  • Location:Portugal

Posted Thu Oct 26, 2017 1:37 PM

replacement NVRAM kit available on exxos store:

 

https://www.exxoshos.../last/storenew/

 

Falcon030 RTC replacement NVRAM

 

falc_rtc.jpg






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