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Hello and good morning.
I’m trying to identify and order the following 5 components for a pcb that runs on 5V 1A,
that is in a pulsating massage device.
Blue capacitor?
marked: 100
Length about 5-6mm X 2mm
Would you please assit finding a potentially compatible part please.
transistor 4 legs
marked: W23 16 BCP55
Length about 6-7mm. X 6mm
Potential match: I’m not sure what I chose here has the W23
–digikey.ca/en/products/detail/nexperia-usa-inc/BCP55-16TF/10418644
Black TVS?
Marked: SMAJ 5.0A
Length 5mm X 2mm
Potential match:
–digikey.ca/en/products/detail/good-ark-semiconductor/SMAJ5-0A/18649116
black and orange ?
No markings, do you have any guess as to what it is? I’m not sure if its just a straight through wire that has orange protective coating and a black ring, and it conducts power with no resistance. Another identical peice on the pcb, also has 0 resistance and there was no short on that side of the board. Maybe I can just re-use it even though the orange coating is a bit cracked.
I think you found a good replacements for #2, #3 & #5.
#4 looks like a high current diode and the orange is just a glue intended to hold it or an adjacent component in place. (on poorly assembled products the glue can end up in weird places, often on the wrong components)
Given the amount of damage on the transistor, there is a rather low probability that those are the only dead parts in the system.
Based on the info provided you seem to have items 2, 3, and 5 figured out.
Unfortunately the blue cap is not easy to ID. The 100 could possibly stand for uF or pF or even nF value but it also be just a marking from the manufacturer on some internal code. Could you provide a better picture of it perhaps? Maybe zoomed in a bit more and from both side and front view?
The orange coating on the item 4 does look to be some kind of glue as Paul said, and it does look to be a diode also. If you have a better couple pic of this as well. Maybe try removing the orange coating on the rest of it before taking more pics?
Yes #4 fits in the L2 slot
The black bead moves freely after removing the orange glue. I’m convinced it has zero resistance. Its just a wire with a bead as you say.
But
For #1. I’m. Baffled. I got everything else set in the cart, ready to order yet I’m stuck at this little blue mysterious component.
Do you notice, the squiggly drawing in Slot L4? It doesn’t look like the regular capacitor symbol. Is it even a cap?
Im adding some more pictures.
1 fits in slot L4
2 fits in slot 016
3 fits in slot D10 (right of L2)
4 fits in slot L2
5 fits in slot C25
Here are some surrounding points of interest:
Slot U5 marked: IL 1117C 3.3 A016
Slot D9 marked: rectifier KD SK56C.
Slot D4 marked: A6W 25.
Transfo yellow marking: 13125-3
I’m assuming that there has to be some kinda “educated guesstimation” that can be made from the combination of the above components.
The device is an Electrical Muscle Stimulation (EMS) device that runs on 5V 1A.
And knowing that the EMS can be between 40-60V at very low Amps.
I would then wonder what material the cap would have to be made of if it is used for fast and slow bursts
And take a suggested type of caps that can fit the slot and start with the lowest farhad and go up from there ?.
“L” means it is an inductor of some sort. I haven’t use many inductors in my time so can’t speculate on type and value.
The ferrite bead, #4, is kind of a high frequency zero turn inductor which is why it is has an “L” reference designator. The orange glue keeps the bead from flopping around in shipping.
Make sure you test this repair on yourself first because you will not be able to check the safety to the manufacturers specifications. I don’t know enough details about these devices but it seems very possible that it can cause painful shocks and/or burns if you get component values or tolerances wrong.
Glad to here it’s up and running. We appreciate when forum users post their project results, thanks!! For the future if your interested here is a link to our heat gun selection .
I’m alive and writing