Electronics Forum: led and seven and segment (Page 1 of 1)

LED (Seven Segment) found with missing segment and dimmer

Electronics Forum | Wed Jul 20 03:10:45 EDT 2011 | umar

I have mount the 8 pcs SEVEN SEGMENT LEDS on the PWB side at SMT Process, after reflow the board test at customer side and facing some issues which is missing segment and also one segment founded dimmers compare to other segment. Data sheet of LEDs

LED (Seven Segment) found with missing segment and dimmer

Electronics Forum | Wed Jul 20 08:40:27 EDT 2011 | mosborne1

Umar - This is usually seen when the lead frame in the die attach is cut with a diamond saw instead of a lasar. We have seen this problem years ago from HP 7 segment displays. If you have Enviromental box (tenney box) you can temp cycle them from 0 d

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