Hi All,
I have just found out that no matter how hard I hit the knocksensor,only the first led can lit up.....

I have had the knocksensor of the block to clean the plug,but nothing seem to help...

Can the Knocksensor itself be broken or is it perhaps the electronic that´s broken????

All info would be great,

Skassa

 

the first light, lights when you have power..

check continuity along the signal wires.. and also check impediance of the sensor.

David

 

Okay the first one lights okay for power supply(weak green),and i will also light up stronger,but no more than the first one...

What shall the impedance be on the knocksensor??


Thanks,
Skassa

 

Have you tried adjusting the sensitivity of the unit ?

 

Yep,
Doesn´t do anything exept light up the first led.

Skassa

 

Hmm, mine was only lighting the first LED on its dim setting, so I knew power was there

What I did was at the sensor end, remove the sensor from the block, take off the little metal clip, and unplug the sensor from the wiring

thats when I saw the green corrsoion on the contacts, so i gave em a good clean with a bit of emery paper, wrapped around a very small (watchmakers) flat blade screwdriver, as its a little tight in there

as soon as I connected it back up, a small tap lit it up like an xmas tree

 

I have cleaned the contacts realy good,but it do not seem to help....they were clean from the beginning,but had to try!!.

I thing i will order a new knocksensor tommorow

Any other info
Skassa

 

Skassa,

You mention you hit the knock sensor to test it. If you hit the sensor directly, you cause damage to the sensor. You have to hit the area around the sensor on the block or, (not sure on this), the bolt, not the sensor. You may have damaged it when you hit it to test.

Cheers,

George.

 

Actuly i hit the bolt holding it first,didn´t work, then i screwed it of the block and tapped it lightly......Then i tapped it hard...and nothing happens ,beside the first light ,wich light up bright...

Thanks,
Skassa

 

Seriously, how do you tap it? A light tap with a spanner literally dropping it onto the sensor bolt should give the desired effect. I used to tap it with the handle of a screw driver but the sound it made wasn't in the bandwidth of the sensor. A crisp metallic 'ting' should get a full red.