Volvo 5wk49264 Remote problem with RF

[kasper1910]

Hi Friends

could someone help me with repair this Remotes. I got two Volvo 5wk49264. First works without problems and second that have something with antena . Rf not working I cannot open and close car. I checked it on xhorse key tool max and no frequences is detected…. So I try to find a problem and use multimeter. On demaged remote the „blue” IC has break in circuit. In working remote circuit is closed. So I think that blue IC is broken. Could someone tell me what is it , what is IC ?? Is it choke ( inductor ) ??? On it are marked two black lines what does mean

https://i.ibb.co/hV4YDhw/Whats-App-Image-2023-10-08-at-20-06-38.jpg (https://ibb.co/hV4YDhw)

https://i.ibb.co/kgKWZzq/Whats-App-Image-2023-10-08-at-20-06-45.jpg

(https://ibb.co/kgKWZzq)https://i.ibb.co/C9Y5ctJ/Whats-App-Image-2023-10-08-at-20-06-53.jpg (https://ibb.co/C9Y5ctJ)


https://i.ibb.co/2vYxDY0/Whats-App-Image-2023-10-08-at-20-06-57.jpg (https://ibb.co/2vYxDY0)

[fuzz1]

Hi
If you think it's an inductor then try to measure the inductance using a multimeter. Meter that can measure inductance is quite common

[arosta]

Hi Friends

could someone help me with repair this Remotes. I got two Volvo 5wk49264. First works without problems and second that have something with antena . Rf not working I cannot open and close car. I checked it on xhorse key tool max and no frequences is detected…. So I try to find a problem and use multimeter. On demaged remote the „blue” IC has break in circuit. In working remote circuit is closed. So I think that blue IC is broken. Could someone tell me what is it , what is IC ?? Is it choke ( inductor ) ??? On it are marked two black lines what does mean

https://i.ibb.co/hV4YDhw/Whats-App-Image-2023-10-08-at-20-06-38.jpg (https://ibb.co/hV4YDhw)

https://i.ibb.co/kgKWZzq/Whats-App-Image-2023-10-08-at-20-06-45.jpg

(https://ibb.co/kgKWZzq)https://i.ibb.co/C9Y5ctJ/Whats-App-Image-2023-10-08-at-20-06-53.jpg (https://ibb.co/C9Y5ctJ)


https://i.ibb.co/2vYxDY0/Whats-App-Image-2023-10-08-at-20-06-57.jpg (https://ibb.co/2vYxDY0)
I think best solution is to get used key and swap broken elements. This used keys are not so expensive.

[kasper1910]

I find that this IC is RFC - Radio Frequency Choke, but I dont know what value - NH parameter. Can someone help I find two types

1) 744761115A - Rf choke (rfc) smd 0603 15nh 0.17ω 0.7a wuerth elektronik WE-KI SMT Wire Wound Ceramic Inductor (https://www.we-online.com/components/products/datasheet/744761115A.pdf)
2) CW1008-10FERROCORE https://www.tme.eu/pl/details/cw1008-10/cewki-smd/ferrocore/

https://i.ibb.co/PY5c8Nf/choke.webp (https://ibb.co/PY5c8Nf)

How many Henr (H) it should has ????

[fred77]

best do another

[kasper1910]

I wrote email do VDO company maybe they answer :)

[dom1226]

I wrote email do VDO company maybe they answer :)


I don't know if you heard from VDO or fixed remote, as your post is over a year old. It appears to be not uncomon issue. I pulled the chip specification:

https://www.ti.com/product/CC1070

I cannot work out the schematic to the remote circuitry. In the end I bridged the connection with solder. Now remote works at acceptable distance, although repair is not ideal.