For the electronic gurus circuit board repair

Not sure a replacement is available so hoping I can repair. Can anyone identify the component that appears burnt?

 

Capacitor

 

It's a 1 Mega Ohm resistor.

SMD resistor code 105- Value in ohms, formula - SM Tech

 

W

Wattage?

 

That I can't tell you just from the code. What's is the power source?

Chip Resistor - Surface Mount | Electronic Components Distributor DigiKey

 

Pretty sure you'll find that is a 1uF ceramic capacitor, also coded as 105. Hard to tell for sure what series based on scale, but you can measure it physically to determine the replacement. Likely 0603 or 0805 Imperial size. The imperial size is the dimension in thousands of an inch times 10. 0603 is 0.06" x 0.03", 0805 is 0.08" x 0.05".

Voltage rating will matter. If it is a 12VDC circuit a 50V cap will be fine. 16V would be fine for 5VDC.

Hope that helps.

 

It's 12v and actually the brake light for a scooter. Of the 6 LEDs the 3 on the end don't light. Given the scortch marks I assume that component is bad and causing the issue

 

There's damage to the pad and at least some of the trace. You may have trouble simply trying to solder to the burnt pad and even if that does work out, there may be some high resistance to where things might burn up again. Not trying to be Captain Bummer, just want you to be prepared for those possibilities.

For component size, I suspect 1206 is the answer

 

I can read the numbers, but not the writing … ! lol!

You can get the replacement from DigiKey, Newark or Mouser (electronic parts suppliers)

 

Hope so because the board is a bit toasty

 

I would get a 1M ohm 1/4watt resistor and get to work. I cant imagine that those LEDs would come close to overpowering a 1/4 watt SMD.

If you use some flux or low temp solder then desoldering is easier.

 

The component in question is not a resistor. It's a capacitor.


Post 6 from @DesertCrawler covers pretty much everything.

@notbostrom - If you felt like shipping up the east coast I can probably have that pad and trace repaired as well as install the component, if one is provided.

 

It seems like it was repaired previously (at the factory?) and they did not get the flux cleaned off.
The corrosion is the result, and probably the fault.
Ensure that the flux is completely cleaned off, post soldering.
Reflow of the solder may fix it.

 

There is a fuse up at the top. I would measure that also. The pad does look burned. Hard to tell if the capacitor is blown or just not cleaned after solder.

 

+1 on checking the fuse. The power leads in the middle of the board look suspect. I'd likely fix the lead dress on them and reflow those too.

Replacing the cap may get the circuit working again, but one has to wonder what caused the failure and what else went out as a result. Could be a bad component or some other one off event, definitely happens, but may be prudent to eliminate systemic issues before gambling with the bad luck option. On the other hand, it is likely not a critical system so...may not matter much. Sometimes the fix is just throw parts at it until it works.

 

Looks like only 1 fuse but half the lights work?

 

Its been many years since I worked with PCB surface mount but you should be able to ohm out the F1 on both sides and see if its open or not. Your hand is covering up the bottom portion so cant see what else is down there.

As others have said buy some liquid flux on amazon. Even the solder irons are cheap on there for a decent one. Reflow everything with flux. You will get cold solder joints and create more problems if you try to use iron without flux.

 

That's a thingamajig.
Or a whoosamadingy, one or the other.
Perhaps a watchamacallit.
Just use some JB Weld on it, that shit fixes errythang.
Maybe add some duct tape too, just to be safe.

 

Don't listen to this guy, he obviously knows nothing
about this subject. If you have something against
JB Weld, just use Crazy Glue and some string. Whack
it with a sledgehammer if necessary.

 

It's 12v and actually the brake light for a scooter. Of the 6 LEDs the 3 on the end don't light. Given the scortch marks I assume that component is bad and causing the issue

Can't you just find a suitable replacement light?
Seems like a better idea than wasting all that JB Weld and duct tape.