Need some help identifying this LED Help Please.
Need some help identifying this LED Help Please.
(OP)
Pictured below is a PCB from a tool changer in one of our older cnc machines. One of the LED's has been damaged and I would like to replace it. Parts are hard to find for this older unit and if I can ID this LED it should be an easy fix.
It's a 3mm dia LED, the circuit board has IH T-D94V-0 Printed next to the other LED's. I am not sure if this is even relating to the type but it could help? I know the board itself is 24VDC, the LED's have a dome top and are clear. Any ideas on what I could use to fix this board would be appreciated.
Thanks
It's a 3mm dia LED, the circuit board has IH T-D94V-0 Printed next to the other LED's. I am not sure if this is even relating to the type but it could help? I know the board itself is 24VDC, the LED's have a dome top and are clear. Any ideas on what I could use to fix this board would be appreciated.
Thanks





RE: Need some help identifying this LED Help Please.
Dan - Owner

http://www.Hi-TecDesigns.com
RE: Need some help identifying this LED Help Please.
This IS just for indicating correct??? If not then we need further discussion.
The writing is the UL stamp of the circuit board material, nothing to do with the LEDs.
http://dkc3.digikey.com/PDF/T073/P2326.pdf
Or look at Mouser.com as they won't screw you on minimum penalty.
Keith Cress
Flamin Systems, Inc.- http://www.flaminsystems.com
RE: Need some help identifying this LED Help Please.
Can I assume clear or white would work, I am not sure what the difference would be. I do see resistors on the PCB so guess I will try to use a voltmeter to determine the voltage needed.
The zero side of the 24vdc flows through a series of 5 resistors on the way to the led's. They are creme colored with yellow/purple/red (in that order left to right) color bands on them.
Thanks again.
RE: Need some help identifying this LED Help Please.
Dan - Owner

http://www.Hi-TecDesigns.com
RE: Need some help identifying this LED Help Please.
I have other machines like this, I will check if they are IR. The encoder portion is not visible during normal operation but I may be able to turn the lights out, remove a guard and take a look.
RE: Need some help identifying this LED Help Please.
Gunnar Englund
www.gke.org
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100 % recycled posting: Electrons, ideas, finger-tips have been used over and over again...
RE: Need some help identifying this LED Help Please.
If that is an LED for a sensor it IS an IRLED for sure. All the useful sensors made are IR. This means you cannot see the light p e r i o d.
You could measure the voltage across the associated resistor and then reasonably infer the LED is working. You have about equal chances the sensor has died as the LED has died. And about a 30% chance the LED still draws normal current but isn't converting to IR light.
Keith Cress
Flamin Systems, Inc.- http://www.flaminsystems.com
RE: Need some help identifying this LED Help Please.
It is a 1984 brother CNC drill and tap model Tc-221. They have been really trouble free for the most part. A loose mount on the encoder assembly allowed the encoder disk to grab one of the led's right off of the PCB (it's destroyed). Everything else looks fine so I might as well try to replace it and cross my fingers.
RE: Need some help identifying this LED Help Please.
RE: Need some help identifying this LED Help Please.
RE: Need some help identifying this LED Help Please.
Try http
(a couple I found by googling infrared indicator card.)
They're the size of a credit card, you sensitize them by exposure to light (sunlight or fluorescent light is best). The indicator typically then fluoresces orange in the presence of IR light.
RE: Need some help identifying this LED Help Please.
Keith Cress
Flamin Systems, Inc.- http://www.flaminsystems.com