Renault SCENIC - Scenic II card - missing card element.

Hello

Due to the lack of time, I had the Scenic II card repaired quickly.

After returning the card from the service, I put new batteries in two cards.
The card that returned from the service took care of the battery within a week, the one that was not used still has a working battery.

I changed the batteries and the same after a week.

I decided to dismantle the card and it turned out that the capacitor is missing - what is its value? Two photos (before and after the service).

Can the lack of this capacitor affect the very quick consumption of the battery or look for a short circuit on some element?

Has anyone ever measured the current consumed by the card during "rest" and operation?

This capacitor often crumbles when opening the card. Rather, it does not affect the discharge of the battery, I have it without it and nothing happens.

Hello
One of the capacitors has stopped working and the radio in the transponder wakes up

best regards
www.MILAtech.pl

olo114 wrote:

Hello
One of the capacitors has stopped working and the radio in the transponder wakes up

best regards
www.MILAtech.pl

Using the photo, can anyone provide the values of the capacitors?

I put in a picture of the Scenic 2 card from HF. If someone wants to, please add the known element values to the appropriate number. Together, you should be able to enter all the values. It will be for posterity .


HF - antennas around 80R
2 - 220pF
3 - 1nF 50V
4 - 8.2pF
6 - 1nF
17 - BCR108

The topic of the cards is always up to date. I put in a new battery this morning. In the afternoon it was only 2.1V and of course the card stopped working.
Can someone help me fix the fault. I have access to the elements, I can sell all of them, including the TDA5100. I just don't know their value. By the way, the question is, does replacing with TDA5110 (more power) make sense?

I see that you have soldered buttons from the lagoon, maybe they unnecessarily raise the card there should be badges.

zuzia3521 wrote:

I see that you have soldered buttons from the lagoon, maybe they unnecessarily raise the card there should be badges.

It can be like that? I did not foresee this, the buttons were replaced by the card service and "clicked" nicely. They can "push themselves" under their own "weight". Will I be sure to check it out?

However, I would bet on a change in the transponder elements, because the attached photos are the same card before shipment and after receipt, and the elements differ (at least in the photo), so I am looking for the value of the elements to remove them all and solder the new ones.

Please repair the card very much so I can give you a card like your measurement just taken at rest 005 mA after pressing the 490 mA button

Do you have the values of the elements around the transponder? It would help me a lot.

Added after 19 [hours] 46 [minutes]:

zuzia3521 wrote:

Please repair the card very much so I can give you a card like your measurement just taken at rest 005 mA after pressing the 490 mA button

A damaged card consumes 300mA at rest and after pressing the button 460mA - 500mA. No short circuit on the battery contacts, and the resistance between them is 91kOhm. For comparison, at the contacts of a good card it is about 10MOhm.

The topic is still relevant ... nobody knows the value of the elements around the radio chip?

I soldered the elements around the transmitter and for some time the resistance at the battery connectors was ok.
After a while, however, everything returned to normal.
Damaged print somewhere?

I also fired those metal buttons and still unchanged.

Anyone have a PCB board for sale with HF?

INFO: The HF card also works with only one antenna. I checked it this way.

Hello. I will connect to the topic so as not to create a new one.
Does anyone know what is the red highlighted item in the photo?

A low value resistor that you probably won't get from the card you are using.

I put in a 2ohm resistor, the card works.

Hello,
unfortunately, I was hit by the trauma of the missing element on the card.
The card opens / closes, unfortunately, it does not start. Maybe someone can tell you what and what value is missing. I marked with an arrow in the attachment

Without this capacitor, the card will function normally.

Checked, it fires without this capacitor. Regards and thanks.

A question for bb.jj because I don't really understand.
3 posts above, you write that the card does not fire because you lack the element marked with an arrow and now you write that it does fire without it?
Can you explain that?

Megane II and Scenic II card schematic without HF.

I did not go into the diagram of what's what, for me some of the elements had to be soldered. As I said, my card is missing condensate, but it works fine.

Hello and welcome. I will stick to the topic because it applies to the same card. Unfortunately, one day I washed my card. The card was wiped with alcohol. Elements were also transferred. The car on this card fires but does not open or close the door. Maybe someone has any idea what should be checked?

Most often the 5100 transmitter is damaged. Buy a better used card and solder your PCF7947 to it.
The TDA5100 chip is hard to come by and comes in a variety of housings.

Approx. If so, I will. Thanks.

Added after 3 [hours] 33 [minutes]:

gemiel wrote:

Most often the 5100 transmitter is damaged. Buy a better used card and solder your PCF7947 to it.
The TDA5100 chip is hard to come by and comes in a variety of housings.

I have one more question. Can you buy a new one instead of the used original card?
also on the same PCF7947 chip ?? Electronics is a bit different from the original one, but has the same layout.

If the layout is the same, you can buy. Only that the card in question (from your link) is not on the PCF7947 chip. There is a microcontroller emulating it.
Remove the link from your post or you may receive a warning from the moderator.

In fact, it is not on the same layout, so there is no risk. I am buying an original used card. Regards.