Thread Number: 54986
Kenmore Calypso Machine Control Board Relay Problem |
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Post# 773864 , Reply# 1   7/29/2014 at 19:46 (3,529 days old) by abced123 ()   |   | |
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fixed it , the relay sodering joint was cracked when I examined it closely |
Post# 773923 , Reply# 2   7/29/2014 at 23:42 (3,529 days old) by kb0nes (Burnsville, MN)   |   | |
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Great catch! Its a common problem on wave soldered boards to have components with heaver terminals not always solder well. Imagine the difference in mass between the relay terminals and the pins of that 40 pin DIP IC! Tough to solder one without messing up the other due to the dissimilar heat and dwell time needed.
The problem may be compounded by the migration to lead free solder depending on the vintage of the board. It might be wise to reflow all the heavy soldered joints on the board just in case. |