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Old 07-15-2021, 01:12 PM   #1
mmartell
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Default Can Anyone Identify the Value of This Component ?

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 ...
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Old 07-16-2021, 07:04 AM   #2
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Default Re: Can Anyone Identify the Value of This Component ?

Lx is normally the suffix for an inductor.
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Old 07-16-2021, 08:04 AM   #3
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Default Re: Can Anyone Identify the Value of This Component ?

Okay what is the value of an inductor marked with the letter H ?
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Old 07-17-2021, 09:11 AM   #4
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Default 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

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Old 07-18-2021, 03:44 PM   #5
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Default Re: Can Anyone Identify the Value of This Component ?

Agreed the picture is way too small.
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Old 07-22-2021, 05:39 PM   #6
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Default 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.
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Old 07-23-2021, 08:33 AM   #7
mmartell
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Default 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.
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Old 07-23-2021, 08:34 AM   #8
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Default Re: Can Anyone Identify the Value of This Component ?

Quote:
Originally Posted by mon2 View Post
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
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Old 07-23-2021, 07:23 PM   #9
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Default 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

Last edited by R_J; 07-23-2021 at 07:46 PM..
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Old 07-24-2021, 07:04 AM   #10
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Default 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.
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Old 07-28-2021, 10:04 PM   #11
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Default 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 ?
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Old 07-29-2021, 03:04 PM   #12
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Default Re: Can Anyone Identify the Value of This Component ?

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