Can Anyone Identify the Value of This Component ?

[mmartell]

Filter at L1 appears marked with the letter H anyone know what that means ? From an Amazon Fire stick remote control. The remote was burning through batteries at an alarming rate I may have popped the filter on disassembly don't know. Also missing a small resistor above it with unknown value but first things first ...

[dick_barton]

Re: Can Anyone Identify the Value of This Component ?

Lx is normally the suffix for an inductor.

[mmartell]

Re: Can Anyone Identify the Value of This Component ?

Okay what is the value of an inductor marked with the letter H ?

[dick_barton]

Re: Can Anyone Identify the Value of This Component ?

No idea. I suspect a search of the internet may come up wiith an answer. Have you a suitable meter to measure it's inductance?
Can you post a clearer close shot of the smd device. I see several smd fuses online with H on the package

[jkb242]

Re: Can Anyone Identify the Value of This Component ?

Agreed the picture is way too small.

[mon2]

Re: Can Anyone Identify the Value of This Component ?

Share the markings of the smd ic next to this inductor.

It appears to be a local buck switching regulator. The ic could help to identify the value for this part.

[mmartell]

Re: Can Anyone Identify the Value of This Component ?

As stated in the first post I do not have the inductor it is missing on my board. The pic is a frame from a youtube video.

[mmartell]

Re: Can Anyone Identify the Value of This Component ?

Share the markings of the smd ic next to this inductor.

It appears to be a local buck switching regulator. The ic could help to identify the value for this part.

Yes this is a good idea though I will say I've looked it up and found nothing but if you can please let me know.

Marking is 4FN5R

[R_J]

Re: Can Anyone Identify the Value of This Component ?

Is it the sot23-5 next to the inductor? My first guess is a Torex XC9140A

[jkb242]

Re: Can Anyone Identify the Value of This Component ?

It’s quit likely not that critical but given the relative indicated size, (determined by wire size used to make the inductor and the designed current anticipated) replacement could be
2-3 μh SMT like a TDK SPM3010-LR or a TMS252012ALM depending on the actual dimension of the pads which were not provided.

[mmartell]

Re: Can Anyone Identify the Value of This Component ?

I've replaced the inductor with one of appropriate size and hopefully value (no marking) harvested from an old iphone board. Now, I am missing a resistor going to the chip enable pin which must be high to be active. The 3v supply is there. I think the resistor is for current limiting ? What value is suggested for the resistor ?

[mmartell]

Re: Can Anyone Identify the Value of This Component ?

33 ohms ? 100 ohms ? Is the value critical for this circuit ?