Fix my Triton ?

[D.S.]

Can I Fix My Triton ?

I shorted the leads while charging with my Triton and killed it. Great Planes told me it would cost about $90.00 to repair or exchange it if I send it to them so I was wondering if I should try to do the repair myself. If I replace just the two components that are viably fried, is it likely that my charger will work again ? I hate to throw things away and since I just recently added a blue back light to the display screen I would really like to put this charger back in service. I will need help finding the replacements for those little charred things on my board if it seems like a doable project. :o

Thanks

Dean

http://static.rcgroups.com/forums/attachments/3/2/4/9/3/a1061962-64-IMG_1936.JPG

http://static.rcgroups.com/forums/attachments/3/2/4/9/3/a1061961-30-IMG_1935.JPG

[ezflyr]

Hi,

Those appear to be power MOSFETS in an SOIC package. The entire right side (pins 5 to 8) of each are shorted together - that is the drain connection. Pins 1 to 3 are shorted together - that is the source connection. Finally, pin 4 is the gate connection.

Can you read any part numbers on the remain of these devices?

John

[Mr.RC-CAM]

http://www.rcgroups.com/forums/showthread.php?p=3483595#post3483595

[D.S.]

Thank you very much! I did a little searching around before I made my post but I didn't find that. I will order the components and try to make the repair :)

Dean

[msmith]

Dean - I kinda thought it'd turn out like this...

Now... Do you have a Harbor Freight nearby? Or I guess Fry's might have one...

Find one of those stores that will sell a 'magnifying headband'. It'll help when you start with this task... Also, make up some tools. Get a few bamboo skewers and also maybe even find an old junked computer motherboard... Practice a few times on the motherboard w/ making some tiny connections... (check the local repair shops and you'll probably get one for free...)

Good luck with it... Please keep us posted with your progress...

-mike s.

[Matt Edwards]

Have you thought of adding a diode to give reverse voltage protection?
Bang a fast diode in series with the Red lead.
Pretty cheap insurance.
Cheers
Matt

[lini]

Dean

I had the same issue a while back and have couple spare FETs, PM me your addy, I'll send it to you free. If you have the circiut board heat gun, it only take 5 minutes to replace them.

lini

[D.S.]

Thanks Lini, I already ordered a few and should have them any day now. Not sure about the "circiut board heat gun" but I think I have something around here that I can do the job with.

Dean

[D.S.]

Well my parts came in today from Allied Electronics, I soldered them and the dang thing works! I almost can't believe it but I sure am glad it worked . Thank's all for the help RC Groups is great. Here's the parts I used.

International Rectifier
MOSFET, Power; P-Channel; -30 V; + 20 V; 13.5
Milliohms; 2.5 W; SO-8; -11 A
Mfr's part#: IRF7424
Allied Stk#: 273-0391 (http://www.alliedelec.com/Search/ProductDetail.asp?SKU=273-0391&SEARCH=&MPN=IRF7424&DESC=IRF7424&R=273%2D0391&sid=455A5880653DE17F)

Thanks again

Dean

[Probedude]

Congrats!!!

[D.S.]

The only thing I had with a small enough tip on it to do the work was a small butane soldering iron. :o Crude, but it worked. Can anybody steer me towards a proper tool for this type of job? I would probably only use it a few times a year so I would be very happy with something well used and a little crusty if I could clean it up and get some use out of it.

Thanks again

Dean

[msmith]

Congrats Dean... I knew you could do it!

Just takes a bit of determination and being able to overcome the intimidation of surface mount soldering...

Good job...

-mike s.