Failed attempt at hardwired headphone jack.

[kingoftaurus]

Hey all!

I purchased an HDMI video stick "Neumi Atom Cast" and due to some stealthy requirements, I needed to eliminate the plug in IR sensor.

I removed the SMT "headphone" jack that the sensor plugged into and hardwired the IR sensor directly to the board.

Long story short, the IR sensor does not work.
Any ideas on what's going on here?

(Ignore the terrible wires, I cut them thinking I reversed polarity and reattached them afterwards)

[wasedadoc]

Do you measure in the region of +3.3 to +5.5 volts on the red wire with respect to the black one?

[kingoftaurus]

 I measure 2.78v

[wasedadoc]

What voltage on the white wire and does it change when you push and hold one of the buttons on the remote?

[Psi]

That footprint has 5 pads, so almost definitly has a switch built in to detect when something is plugged into the jack.

Maybe the circuit was using the switch to enable/disable the IR somehow.
And without that link it won't work.

See if you can figure out how that headphone jack worked and which contacts were the plugin switch/switches.
Then replicate that so its the same as having the jack plugged in.

[wasedadoc]

That footprint has 5 pads, so almost definitly has a switch built in to detect when something is plugged into the jack.

Maybe the circuit was using the switch to enable/disable the IR somehow.
And without that link it won't work.

See if you can figure out how that headphone jack worked and which contacts were the plugin switch/switches.
Then replicate that so its the same as having the jack plugged in.

That is a possibility though the typical 3 pole socket with 5 pins has switches which open when the plug is inserted. That would be equivalent to leaving those PCB pads as they are.

[kingoftaurus]

I thought the same thing about the switch. I will get back to you about the white wire.

I purchased another one so we will get the answer for sure.

The old jack was mutilated taking it off the board unfortunately

White to black is .595 v no change when remote pressed

Update:

New device came in.

Bottom two pads are always connected. Top two pads are switching, (open when plugged in).

Black and white are reversed.

Hope it still works...

(It works now