My encoder led exploded

Hello

First of all, my english is not good.

The encoder I used for my steering project was broken due to the wrong connection.
The led inside exploded.Circuit paths are broken.I tried to find a solution and I did as follows.

1-I removed the led placed on them and placed a different color.
2-I connected two of the four pins as a-b phase.
3-I made 5v and gnd connection for the led.

It did not work. What should I do?

Opera Anlık Görüntü_2020-04-17_173855_tr.aliexpress.com.png

3-I made 5v and gnd connection for the led.

That was probably what caused the first explosion. You must use a current limiting resistor in series with an LED.

jremington:
That was probably what caused the first explosion. You must use a current limiting resistor in series with an LED.

Originally there was no problem, I think it was worth each other.
I replaced the broken led with a new one. But something seems to be missing. The remaining 2 pins are empty. There are 6 pins in total.
I soldered to the direct encoder.Please take good care of the photo, one is original and the other is final shape.

Does the LED realize the color?

jremington:
That was probably what caused the first explosion. You must use a current limiting resistor in series with an LED.

Look carefully there's an SMT resistor going to the pad for the LED.

Firstly the optical line-up pobably has to be good for this to work, a slit source is needed, and secondly
the two sensors (probably photodiodes or phototransistors) might be damaged - they need testing to
see if each responds to light.

Also they might have IR filters on them, so require an IR LED.