Electronics Forum: lens led smt problem (Page 1 of 6)

Ghost circuit shorts under smt resisters only when they are located on solder side of pcb (glued down)

Electronics Forum | Fri Jul 23 14:07:52 EDT 1999 | Carl J. Odle

We are having a process related problem with pullup resistors on a controller card which has a I960 micro-processor. The controller monitors signal inputs and it's own resources then blinks a LED to indicate its working. The problem is that after a p

Re: Ghost circuit shorts under smt resisters only when they are located on solder side of pcb (glued down)

Electronics Forum | Sun Jul 25 08:54:37 EDT 1999 | Tom Gervascio

| We are having a process related problem with pullup resistors on a controller card which has a I960 micro-processor. | The controller monitors signal inputs and it's own resources then blinks a LED to indicate its working. The problem is that after

Re: Ghost circuit shorts under smt resisters only when they are located on solder side of pcb (glued down)

Electronics Forum | Fri Jul 30 09:43:44 EDT 1999 | C.K.

| We are having a process related problem with pullup resistors on a controller card which has a I960 micro-processor. | The controller monitors signal inputs and it's own resources then blinks a LED to indicate its working. The problem is that after

Re: Ghost circuit shorts under smt resisters only when they are located on solder side of pcb (glued down)

Electronics Forum | Mon Jul 26 14:14:51 EDT 1999 | Steve Gregory

| | | We are having a process related problem with pullup resistors on a controller card which has a I960 micro-processor. | | | The controller monitors signal inputs and it's own resources then blinks a LED to indicate its working. The problem is th

Re: Ghost circuit shorts under smt resisters only when they are located on solder side of pcb (glued down)

Electronics Forum | Mon Jul 26 10:25:12 EDT 1999 | Boca

| | We are having a process related problem with pullup resistors on a controller card which has a I960 micro-processor. | | The controller monitors signal inputs and it's own resources then blinks a LED to indicate its working. The problem is that a

SMD LEDs stick to nozzle while mounting

Electronics Forum | Mon May 21 05:21:21 EDT 2012 | eniac

Yes, I had the same problem. I ordered another nozzles, with dimension similar to dimension of lens, increase air pressure in mounter and increase place time.

Reflective coating on PCB

Electronics Forum | Thu Nov 14 12:11:00 EST 2002 | V.RAMANAND KINI

I am looking for a reflective coating on PCB. I have designed a PCB with SMT type side LEDs and Top LEDs. The light from these LEDs fall on to a lens profile on top of these and get mangnified and reaches the dashboard instrument's pointers. I tried

OSRAM Power TopLEDs with dome

Electronics Forum | Mon May 02 18:07:32 EDT 2005 | Moe

Has anyone developed a custom nozzle for these guys? http://www.osram.convergy.de/upload/documents/2005/03/03/14/47/LA_LO_LS_LY_E63B.pdf I've found that there is a deposit of epoxy at the base of the lens that can sometimes cause the LED to lodge in

SMT LED functional failure

Electronics Forum | Wed Apr 16 08:43:00 EDT 2003 | davef

Given that the LED work properly after being touched-up and that you don't have problems with other components, you may not be wetting the LED termination solderability protection during your normal reflow. Use a profiler to check the temperature on

Laser soldering LED's

Electronics Forum | Wed Jan 09 09:31:53 EST 2008 | flipit

I solder LEDs everyday from 0402 sizes on up. I work for an optical company so every product I make has LEDs. Some products have hundreds of LEDs per circuit. The problem is that clear materials are not filled materials and thus don't have the adv

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