Hello,

I need the datasheet to measure on this component, I guess it´s a converter from altern or pulse signal to Vdc... It´s from a VDO rpm indicator.

Thanks and best regards.

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Regards from Mallorca.
You´ll never know enough...

 

I can't say I've ever heard of it, but that number sounds like a bridge rectifer? - how many pins does it have?.

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Hello Nigel,

it could be perfectly a bridge rectifer but as it is mounted on this rpm indicator I think it´s not working as always in power supplies because in this case I guess it receives a variable pulse or sinoidal signal from the sensor and changes it to Vdc.

The component is the black vertical one and has 4 pin, 2 are marked with A.C. signal and 2 with + and -. The problem is that this one shows 500 rpm less than the other on the boat and I wanted to know the kind of signal the sensor sends to the G input on the indicator to simulate it on the workshop. As you see there are not too many things which can fail on the PCB...

Thanks.

Attached Images

indicador_rpm_saudade_vdo_interior__b30c80.jpg (480.3 KB, 268 views)

__________________
Regards from Mallorca.
You´ll never know enough...

 

It's a bridge rectifier then, no doubt about it!.

As for your fault? - it could possibly be the rectifier, check none of the four diodes are faulty (or replace it with 4 diodes and see if it makes any difference).

__________________
PIC programmer software, and PIC Tutorials at:
http://www.winpicprog.co.uk

 

Hello Nigel,

yes, if I´m not wrong in my measurements there is a faulty diod, it´s open. Can I replace it by any other rectifier? I don´t know the input signal frequency and voltage and may be if it has other caracteristics the indicator is not showing exactly the same...

A private question now, do you know any good Jiu jitsu trainer here in my island? I will open a gym for martial arts because I´m Muay thai trainer and I´m looking for one Jiu jitsu trainer. I have some options with a french guy which is very known here and some spanish ones but I´m still not decided.

Thanks.

__________________
Regards from Mallorca.
You´ll never know enough...

 

Assuming you're using a digital meter?, then it will show the voltage drop across the diodes in the bridge - this will tell you if it's silicon or germanium (I would imagine silicon?). Try replacing it by four diodes to make a bridge.

Sorry, I've no idea, the only non-UK martial arts guys we know are in Israel and Turkey.

__________________
PIC programmer software, and PIC Tutorials at:
http://www.winpicprog.co.uk

 

Hello,

Yes, I used a digital multimeter and I could see around 0,4V in all the diods less in one which I guess it´s open. I already bought a similar component to replace it and to check onboard. This VDO gauges doesn´t exist anymore, only compatible ones which are bigger and the price for each one is 138€ so I prefer to repair it.

Thanks anyway!!! You never know...

__________________
Regards from Mallorca.
You´ll never know enough...