33

Joint Contamination
The top of the plated through hole has been contaminated during the soldering operation. The temperature has caused the coating on the resistor network to soften and has contaminated the board surface. During pre heat the top board temperature would normally be 100-110oC and may well reach over 190oC when contacting the wave. The component should not have caused this problem if normal process conditions are maintained. The component should be reassessed for process compatibility.