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Entry  Fri Nov 4 23:34:28 2016, awade, DailyProgress, Electronics Equipment, Trouble shooting in the north path 100_0258.JPG100_0261.JPG
    Reply  Tue Nov 8 14:01:11 2016, awade, DailyProgress, Electronics Equipment, Trouble shooting in the north path 2016-11-08_11.35.34.jpg
       Reply  Wed Nov 16 12:46:59 2016, awade, DailyProgress, Electronics Equipment, Trouble shooting in the north path and Murphy's law 
          Reply  Wed Dec 7 18:59:46 2016, awade, DailyProgress, Electronics Equipment, FSS monitor daughter board damage and Murphy's law D040424-B.pdf
             Reply  Wed Dec 7 21:14:07 2016, Koji, DailyProgress, Electronics Equipment, FSS monitor daughter board damage and Murphy's law 
                Reply  Thu Dec 8 17:37:32 2016, awade, DailyProgress, Electronics Equipment, FSS monitor daughter board fixed 
       Reply  Thu Jan 5 15:50:55 2017, awade, DailyProgress, Electronics Equipment, Trouble shooting in the north path 2017-01-05_15.17.55.jpg
Message ID: 1787     Entry time: Thu Dec 8 17:37:32 2016     In reply to: 1786
Author: awade 
Type: DailyProgress 
Category: Electronics Equipment 
Subject: FSS monitor daughter board fixed 

This is good method for getting the chips off.  I used the pincer soldering iron to pull them off gently with minimal heat.

I've now replaced U1, U4 and U3 in sequence (testing between each).  With the replacement of U3 the board now works as normal.  Issue resolved yes.

Quote:

I do similar board damage frequently too. If a pad is isolated (Not-Connected), this often happens. And it is harmless.
If you use brute force, desoldering may cause more serious damage of the lines, of course.

For such a chip with many legs, you just can gently cut the legs of the chip with a knife, and desolder each leg individually.
This helps you to desolder them with minimal heat injection.

 

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