VAG-COM/VCDS EVERYTHING

**Tomas003** · 5th April, 2021, 05:51 PM

Please foto. Tried with one car? Maybe a fault in the car electrical system?

Originally Posted by Billyym

Anyone had issues with Stm32f405

The chip burning out?

Bought 5 cables and 2 burnt out as soon as they were plugged into the car.

**Billyym** · 5th April, 2021, 07:33 PM

https://ibb.co/fYM4syF
https://ibb.co/7Y3YV5F
https://ibb.co/myqbP0Z
https://ibb.co/t3rbpVL
https://ibb.co/zJQ24yr

Here are the links to the images. You'll see the same chip being burnt on 2 different cables. And 2 different cars. Mk5 Golf and Mk7.5 Golf R

**Billyym** · 5th April, 2021, 08:02 PM

Also video on YouTube if you type Hex v2 burned someone else posted same issue about 1 week ago.

**hid3** · 5th April, 2021, 10:42 PM

CAN chip is burnt out.
What markings on the chip are there?
Would be interesting to see the datasheet of it.

Also, seems like voltage regulator has suffered too.
You'd better post high-res pics of those components from undamaged cables.

**Billyym** · 6th April, 2021, 12:05 AM

https://ibb.co/99Hq2n4

This is a high resolution image of the cable. Not mine. But exactly the same.

**Lolo4321** · 6th April, 2021, 07:52 AM

I doubt in repairing, tried on mine V2 (actual V1) didn't work. ( k2 ) is still dead.
Honestly I'm thinking of ditching the VCDS clones, Carly is similar in price, and original with support and warranty. And seems to support various brands.

**flyfvdi** · 6th April, 2021, 09:49 AM

Originally Posted by Billyym

Anyone had issues with Stm32f405

The chip burning out?

Bought 5 cables and 2 burnt out as soon as they were plugged into the car.

please contact your seller or fly support engineers to deal with

**flyfvdi** · 6th April, 2021, 10:20 AM

now chip prices are skyrocketing and very difficult to buy. maybe no fly stm405 vii plus loader vcds hex-v2 to sell soon.

**hid3** · 6th April, 2021, 11:31 AM

Billyym,

There is a chance that voltage regulator is/was defective on those cables.
So probably fake batch of regulators, incorrectly marked or really defective. Probably they made 12v->9v conversion rather than 12->5...
For the purpose of experiment, could you open up the existing working cables, connect 12V to the cable's OBD2 side on bench and test the voltage output after the regulator using multimeter?

**Gimse** · 6th April, 2021, 01:53 PM

Originally Posted by Billyym

Anyone had issues with Stm32f405

The chip burning out?

Bought 5 cables and 2 burnt out as soon as they were plugged into the car.

It was a lot of problems, and the part that caused this is the following voltage regulator2920A-5.0WS .image_2021_03_11T14_26_47_227Z.jpg
If you still have testers from that lot, I advise you to contact the seller, ask him to send you the respective part and replace it yourself because you risk damaging the others as well. To make sure that the others have no problems, you should to measure that voltage regulator . If you don't know how, contact an electronics technician.
You don't have much to do with the pcb burned can chip, because you don't know if the ARM microcontroller has been damaged and the best thing is to send it back pcb and the seller send you another pcb for replacement.

**peetr** · 6th April, 2021, 02:01 PM

Is it possible to replace it with a better voltage regulator? We could replace it with a voltage regulator that is more robust

**Salah Bismilah** · 6th April, 2021, 02:04 PM

One is 5v linear regulator..... Not sure what the 8 pin is DADU 1849 chip is.

Edit....Just reread the post from Hid3 and p.m message from very helpful person its the CAN Transciever....although couldn't find any info on the chip on google.

**bg17aw** · 6th April, 2021, 07:22 PM

Originally Posted by Gimse

It was a lot of problems, and the part that caused this is the following voltage regulator2920A-5.0WS .image_2021_03_11T14_26_47_227Z.jpg
If you still have testers from that lot, I advise you to contact the seller, ask him to send you the respective part and replace it yourself because you risk damaging the others as well. To make sure that the others have no problems, you should to measure that voltage regulator . If you don't know how, contact an electronics technician.
You don't have much to do with the pcb burned can chip, because you don't know if the ARM microcontroller has been damaged and the best thing is to send it back pcb and the seller send you another pcb for replacement.

Are you saying the seller should send the same exact part? It that part is not good, why replace it with the same?

Sending PCB back to China, are you joking? transport would be too expensive

Let's find an equivalent for that part, locally

**Salah Bismilah** · 6th April, 2021, 09:34 PM

Originally Posted by bg17aw

Are you saying the seller should send the same exact part? It that part is not good, why replace it with the same?

Sending PCB back to China, are you joking? transport would be too expensive

Let's find an equivalent for that part, locally

What hid3 saying if i got this right is the voltage reg might be duff or it might be fake regulator it might be outputting 9v instead of 5v which 2920a -5.0ws is....note 5ws is the output....so if you have electronic store get a proper 2920A 5v output....that's the reason it might be burning the Can chip....you easily test it yourself if you have multimeter....if remember middle pin is output...and left pin ground....you should have around 5v to ground.