Solder hole after reflow

2017/2/28 22:27:38

Hi,
For the past few weeks, we been seeing solder hole after reflow and this product been running for almost a year. We had try to shorter and longer the pre-heat time, reflow time and even reduce and increase the temperature....but could not help...... We also get the solder paste supplier in....still could not solve...... Appreciate if you could advise......
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szoke.szabolcs

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