One example of effectively testing LEDS on a PCB assembly

We recently had an opportunity to provide a solution to a high-volume manufacturing problem. Our customer needed to program the microcontroller Flash in production volume.  IQ was prepared for this with our Prodigy line of production programming stations.  But this time there was an interesting twist.  The assembly had several different SMT LEDs with different colors.  Plus, the white LEDs had been binned by the manufacturer for intensity.  The panels were serialized and records were maintained as to the LED bin number for each serial number.  The task was to verify that the proper parts were being loaded by the SMT equipment.  And to adjust the firmware for the white LEDs to achieve consistent intensity.

The architecture of the Prodigy 2114 system was flexible enough to permit the solution.  The 2114 is a Single Well, 4X4 Channel, Mux X4 device, utlizing the SMH Flashrunner FR04A16.

Once the panel serial number had been scanned by the Prodigy the system queried the factory database for binning codes.  Then the firmware was modified so that PWM (Pulse Width Modulation) parameters were properly set.  The PCB assemblies on the panel were then programmed using the parallel channels of the FlashRunner.

Finally, one of each type of LED was turned on and the Prodigy 2114 used a multichannel Feasa LED analyzer to verify that proper LED colors were mounted and that the white intensity was in spec.  Our customer was pleased with IQ’s innovation and our cost-effective solution.