Peugoet 307 KEY Blip MOTHERBOARD

[bohaboha]

This circuit is for a remote control for a peugoet307 there are short on two smd capacitor marked on the last picture (20230815-182713) one black green has not seen reached like that before maybe someone can enlighten about it

[stj]

Re: Peugoet 307 KEY Blip MOTHERBOARD

camera needs a macro setting or an extra lense - the images are out of focus

[bohaboha]

Re: Peugoet 307 KEY Blip MOTHERBOARD

thanks how about them here

[stj]

Re: Peugoet 307 KEY Blip MOTHERBOARD

i think the red ones are caps,
the green thing is interesting, maybe a fuse or diode?

[bohaboha]

Re: Peugoet 307 KEY Blip MOTHERBOARD

i think the red ones are caps,
the green thing is interesting, maybe a fuse or diode?

stj please I don't see any red here but the green probably more diode or capacitor than fuse because in car remote control there are usually no fuses.

[stj]

Re: Peugoet 307 KEY Blip MOTHERBOARD

i know a fuse makes no sense with a coincell driven circuit.
what is actually wrong?
the green mystery looks o.k. visually.
the usual fault on these type of things is the buttons

[bohaboha]

Re: Peugoet 307 KEY Blip MOTHERBOARD

The problem with this is it has no contact with the car plus that the two capacitor that is circled in them first bad pictures are short I have removed both but it is the same on the tracers and I do not find any connection on the circuit

[redwire]

Re: Peugoet 307 KEY Blip MOTHERBOARD

Uh which two capacitors? I can see nothing marked in the pictures. There would be a short across the white ones for RF tuning, that is normal.

The ceramic green part is odd and it has a polarity stripe. There's no need for a temperature or water sensor, or trimmed resistance or capacitor. That leaves an inductor but no need for the stripe. It's some specialty part.

The RF TX IC K110 looks NXP, and the NFID IC looking too fuzzy to make out the part number.

Repairing these, I find it's dirt/spilt coffee, bad switches. The battery holder can also get bent/mangled.
I will scrub with IPA and a toothbrush, then resolder any cracked joints. Cracked capacitors is harder to find.

One side of the board is the RF remote TX, the other side key NFID.

[bohaboha]

Re: Peugoet 307 KEY Blip MOTHERBOARD

Uh which two capacitors? I can see nothing marked in the pictures. There would be a short across the white ones for RF tuning, that is normal.

The ceramic green part is odd and it has a polarity stripe. There's no need for a temperature or water sensor, or trimmed resistance or capacitor. That leaves an inductor but no need for the stripe. It's some specialty part.

The RF TX IC K110 looks NXP, and the NFID IC looking too fuzzy to make out the part number.

Repairing these, I find it's dirt/spilt coffee, bad switches. The battery holder can also get bent/mangled.
I will scrub with IPA and a toothbrush, then resolder any cracked joints. Cracked capacitors is harder to find.

One side of the board is the RF remote TX, the other side key NFID.

That's right, the picture is not included because it was too big.
The two capacitor I meant are the black-green and the first
in the narrow edge the two have continuity oh short is kar after i train them away and what can i replace the black green with