The Troubleshooting and Repair for On-board Charger (OBC) Thread

[Exhausted76]

See note added about the "blend"

Just to let you know. Full fix achieved and now charging. £4,000 saved by not giving it to the garage. Sincere and grateful thank you to YOU

 

[Daniel11]

Bonjour à tous
Ou achetez vous ces 2 résistances de 4,7 ohms en 7w et 10w
J'arrive pas à trouver les mêmes résistances
Merci

 

[kiev]

Bonjour

Hello everyone
Where do you buy these 2 resistors of 4.7 ohms in 7w and 10w
I can't find the same resistors
Thanks
=====
Howdy Daniel,
These are made in Japan by TAM and don't seem to be available thru normal electronics distributors.

i just use Mouser to find similar devices with same pin spacing and equal or greater power rating.

Easiest method may be to crush the remains and leave a bit of the internal leads with which to attach the replacement device (avoids need to remove the waffle plate™ 72 solder joints)

 

[Fuseit]

It might be possible to take the boards and cable components to an electronics repair shop (cell phones, tv, etc) to do the soldering?

How or why was the connector removed such as this--not sure i've ever seen this before.

Well tbh I believe the board had been worked on before I went in there as I was extremely careful and it still managed to separate. I did take the board to the phone repair shop and they couldn’t help as it was so fine. So I read online this professor of electronics mentioned you can use contact glue I went down to the store and purchased the clear gorilla contact adhesive and put a small blob on either end and pressed down for 10 seconds, it appears to of made contact with the board and the legs have also made a good contact. I’m waiting on my blue capacitors to solder in to replace the low spec ones that were put in by an electronics shop. I’ll update when everything is done and hopefully fingers crossed it will be ok. I don’t think by inspection of that ribbon connector it was ever soldered by the factory.

 

[kiev]

I don’t think by inspection of that ribbon connector it was ever soldered by the factory.

The factory uses solder paste which mainly connects on the bottom side with a tiny bit of solder, looks like nothing from the top but it's there.

But even if that might have been true in your case, then you still need to solder each pin to ensure good electrical continuity. If one of those connections were to bounce open while charging it could cause extreme damage to the waffle plate™ which is not an easy item to replace if you can even find one.

The trick is to use lots of flux, a fine tip iron slightly wetted with a bead of 63-37 or 60/40 tin/lead solder, and slowly drag the tip along the pins and pads. The solder from the bead will adhere to the pads and pins to make the joint. if excess is deposited or bridges form, they can be removed with a "dry" tip (i.e wiped clean with a wet sponge) which will draw solder from a joint, or by using copper wick made for desoldering, it comes in various widths #1-5 so get the thinnest #1 for this sort of work.