FW21 Pro driver

11 posts / 0 new
Last post
Vbryanv
Offline
Last seen: 2 hours 37 min ago
Joined: 06/08/2020 - 23:14
Posts: 10
FW21 Pro driver

Literally a series of unfortunate events!

I want to see if I could buy just the driver for the fw21 pro? I got the pro a few weeks ago and about a week after use I went to remove the head and I removed the lense cap instead. When I went to screw it all back together the optic spun and destroyed the leds. I didnt have any idea how to repair but I decided to take a crack at it. I replace all 3 leds just incase. I also dedomed the leds and had to replace the wires on the driver because of the poor job I did desoldering them. Looks like when I went to remove the wires I touched a small smd components and I got it back on but I think it’s FUBAR. No matter what I try I can’t get it to work. It’s in a spot called d1 and I mean it’s tiny.
http://imgur.com/a/8h1aI5i

Where can I find this driver complete?
Take a look at the picture and let me know what it is that I messed up please?

treellama
Offline
Last seen: 2 hours 8 min ago
Joined: 12/08/2018 - 21:20
Posts: 173
Location: Pittsburgh

I would email service@lumintop.com, they’ve offered to sell me an FW3A switch before. Unfortunately the shipping from China made it impractical—but a driver is probably one of the more expensive parts of the FW21 Pro so it might still be worth it.

Vbryanv
Offline
Last seen: 2 hours 37 min ago
Joined: 06/08/2020 - 23:14
Posts: 10

I reached out to them last night so fingers crossed.

What is the part I damaged. I know it’s tiny but can someone identify it?

treellama
Offline
Last seen: 2 hours 8 min ago
Joined: 12/08/2018 - 21:20
Posts: 173
Location: Pittsburgh

D1 would be a diode. Should be easy to replace if you know the spec.

Vbryanv
Offline
Last seen: 2 hours 37 min ago
Joined: 06/08/2020 - 23:14
Posts: 10

No clue and it’s kinda melted. Any suggestions?

treellama
Offline
Last seen: 2 hours 8 min ago
Joined: 12/08/2018 - 21:20
Posts: 173
Location: Pittsburgh

I just won a FW21 Pro in the GAW. When it comes I can try to see what the diode is on there, but that will be many weeks from now. Lumintop support is probably a better bet!

icpart
Offline
Last seen: 16 hours 10 min ago
Joined: 04/15/2019 - 01:13
Posts: 166
Location: Varna, Bulgaria

Just replace D1 with ordinary schottky diode with same package. If you have multimeter you can test if its work.

Vbryanv
Offline
Last seen: 2 hours 37 min ago
Joined: 06/08/2020 - 23:14
Posts: 10

Sorry but I’m playing way out of my league. I have no idea what the same package means.

I do have a meter. But what am I actually testing. When I do a diode check it actually beeps but this thing is melted.

I’m sure years from now I’ll look back at this moment and think how simple of a fix this is but right now….. Headache

icpart
Offline
Last seen: 16 hours 10 min ago
Joined: 04/15/2019 - 01:13
Posts: 166
Location: Varna, Bulgaria

I mean same SMD package size. This diode is for reverse battery protection. If you can read electronic circuit look here http://budgetlightforum.com/node/48447
The FW21Pro must use similar design I see from your picture. In multimeter diode test RED (positive) probe must be connected to diode Anode and negative (Black) probe to Cathode. Multimeter in that connection must measure actual voltage drop across diode, which for schottky diode is about 0,3-0,4V. When you replace probes directions i.e. RED to Cathode and Black to Anode diode must not conduct. Schottky diode compared to regular diode have lower forward voltage drop.
If you don’t know how diode work see that good video

Vbryanv
Offline
Last seen: 2 hours 37 min ago
Joined: 06/08/2020 - 23:14
Posts: 10

Thanks for the video…. bring back memories. I know just barely a little, but more that some about basic electronics. Other than how stuff works, I’m lost.

I went on mouser….with all the options seems impossible to figure out what i need.

question?

If I just remove the diode and bridge the gap, would/should that work? I know I would lose the protection, but at least then i can see if that’s the only thing I messed up.

icpart
Offline
Last seen: 16 hours 10 min ago
Joined: 04/15/2019 - 01:13
Posts: 166
Location: Varna, Bulgaria

Yes it must work, but you will lose accuracy of battery voltage reading from MCU. In Anduril firmware there is parameter which compensate voltage drop over diode.