BRU from EPCOS AG. Find the PDF Datasheet, Specifications and Distributor Information. epcos r datasheet, cross reference, circuit and application notes in pdf format. R ,92 MHz. Abstract: R epcos r SM r SAW R SAW R sm r R EPCOS r saw S M R Text: Competitor P/N (MHz).

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RF Components and Modules

October 13, 2. The resistor limits the output impedance of the controller pin to prevent it from clamping the transistor base to a fixed voltage and allow the resonator to overlay an AC component onto the DC voltage.

As for this circuit, have a look at page 6 of the AppNote linked below. What you can measure, though, is the pulse signal from the controller. How it works, in easy words: I had to try two different transistors, the first one was probably already dead before transplantation I already wondered why I never used that remote control. I would guess that is pretty much the same for each car manufacturer, as are the inner workings.

Imagine unlocking your car, driving around some, and then being unable to lock it again. The probability of finding a suitable transistor inside such a transmitting device is very high.


This will be the one nearest the feeding point of the antenna, like in the picture above.

Repairing a remote car key

No abstract text available Text: I have noted the designation of the found replacement in the picture above. D707 still had one remote in spare though, and together with a bought new one the set was complete once again. I did it like this twice, but as said — pain! EPCOS is continually improving its processes and thus the quality of itsand systematically improving its quality management system.

It features a standard circuit that very closely resembles my remote key, plus a detailed function explanation. But it made me wonder if it could be fixed — so I cracked it open. A second one worked like a charm! B 0A95 B Text: Principles of SAW resonator stabilized oscillators and transmitters No related posts. In the end, you probably have to find out by trial and error.

EPCOS is continually improving its processescommitted to constantly reviewing and systematically improving its quality management system. The current types are mostly pin compatible to the old ones.

The output to the antenna the copper strip along the left edge appeared near-zero and the pulse signal after the coupling resistor was pretty deformed, too.


Do not heat the resonator for too long.

Epcos r – Montare motore elettrico

Use hot g707 or reflow techniques if you can, or else heat the ground plane from the side, OR remove the resonator by applying a small amount of solder to the case top and heat it up completely. This site uses cookies: Use the datasheets to get the correct one for your frequency and pin layout.

This picture was taken after the repair, which explains epcls flux residues. Leave a Reply Cancel reply Your email address will not be published.

You will need to reassign the key to your vehicle according to the proper epos designated by the manufacturer. Take care not to rip the copper traces off the pcb, as the glue keeping them there becomes flexible when overheated.

What you get is a high frequency signal during each high-level time of the remote code signal and no signal during each low-level time. Previous 1 2 Good thing that mechanical locks are not totally uncommon.