Derbi teller valt uit

[Stinos2000]

Hallo, ik heb een probleem met de teller van mijn drd racing ltd uit 2008. De teller schiet tijdens het rijden vaak in de storing. Het scherm is dan volledig uit (behalve de backlight en losse lampjes). Dit gaat alleen over als ik de stekker van de teller eruit haal en er weer in steek (stroom eraf en erop zetten dus). Ik heb laatst mijn volledige kabelboom gerepareerd want het was nogal een bende... Voordat ik dit deed had de teller dit probleem al. Nadat ik de kabelboom weer terug had geplaatst bleef de teller gewoon werken tot dat het een keer goed regende. Ik ga er vanuit dat er ergens kortsluiting is maar ik kan niet goed vinden waar. Weet iemand welke kabels de storing zouden kunnen veroorzaken? De teller valt alleen uit tijdens het rijden (tot nu toe dan) en het gebeurd vaak bij hogere toeren.

[pog]

Zou je eens kunnen meten hoeveel volt je teller krijgt? dat zou +/- 12 volt (dc) moeten zijn. als je dit meet. doe het dan ook met de brommer lopend en meet het een keer wanneer je hogere toeren hebt. je kunt dit bij de teller meten met het rode draad. of bij de spanningsregelaar.

[Stinos2000]

Spanning op de 12v lijn lijkt goed te zijn. Ik heb laatst al de spanningsregelaar vervangen omdat mijn knipperlichten raar deden en de accu vervangen (voor de zekerheid). Bij alle combinaties heeft het scherm dit probleem. Wat mij vandaag opvalt is dat het scherm een aantal keer opnieuw opstartte alsof de spanning er even af ging. Daarna schoot het scherm weer in de storing. Ik heb bijna het gevoel dat de stekker gewoon lam is....

[pog]

Ik had een tijdje geleden dat mn teller moeilijk deed. Maar ik had kortsluiting door kabels dieper in mn kabelboom.

Laad je accu nog goed bij?

Kan ook zijn dat de stekker indd niet meer goed is. Maar waarom dat zou zijn als je meer touren maakt klinkt niet logisch.

[Stinos2000]

Ik ga idd maar kijken naar kabelbreukjes. Het display reset nu meerdere malen tijdens het rijden. Dit kan eigenlijk alleen als de spanning van het display gaat dus dit zou op een kabelbreuk wijzen.

[Kata 2.0]

Of een connector die slecht is. Succes met het zoeken.

[Guillaume.D]

Hello

I can repair and reprogram these dashboards.

I have all components to repair any problems (except the LCD display itself, but it's rarely physically broken beyond repair), I can even replace MCU if needed, and I have firmwares for all known models (712417, 712412, etc).

I can change odometer and srv values, and for model 712417 I can also change wheel diameter (17" or 18").

I think I will create a new topic with more details.

If you are interested to send your dashboards for repair or reprogramming, just know that I'm not in the Netherlands, I'm French, sorry... Don't hesitate to contact me anyway.

[42]

A new topic is a good idea, easier to refer to that.

[Stinos2000]

Oh thats very nice, Im actually an electrical engineer so I like these things. From what I can see now the problem is not within the dashboard but elsewhere. Sometimes the Leds on the side light up like starting the bike so I think the problem is the 12V cable somewhere. I might buy another wire harness. The problem with that is that is that the aftermarket wire harnesses all have the wrong connector for the dashboard. I already have seen your other post with the connector info so I can try buying another the aftermarket wiring harness and retrofitting the correct connector on it. Also i might just see if I can replace the existing 12V wire which would be cheaper.

[Guillaume.D]

The problem you described may be caused by using the wrong kind of sparkplug, for example using a B10 instead of a BR10. Without the integrated resistor, there is a lot of high voltage parasites that can cause digital circuits to misbehave. Try with a new BR sparkplug, it may be as simple as that

The dashboard connector pitch is standard 0.1" (2.54mm) so you can make your own connector easily and try power the dashboard outside of the motorbike, with an external 230VAC to 12VDC power supply.

[Guillaume.D]

Hello Guillaume,

I have seen your post on the dashboard and I have a small question regarding the indicator LEDs. one of the problems I have is since I changed my headlight to 12VDC the Indicator light for the high beams has broken. In my understanding making the headlight DC should not have made the LED break but maybe something went wrong in that thought process. I thought maybe you have an explanation for this? Also I might want to solder a new one on when the time comes so i was hoping if you knew what kind of LED is used?

With kind regards,

Stijn Kos

Replying here so it may help others


The blue LED is PLCC-2 3528, you can find easily on online electronic shops or aliexpress. There are other components that can fail and cause the LED to not work.

But this is not your main problem, because on your dashboard model, this indicator will not work with DC headlight. There are two PCB versions for these dashboards :

The old version was used on Euro-2 motorbikes with DC headlight (dashboard 712408, 712409 and some others), it can also work with AC headlight but I don't recommend it. The PCB is most often marked "SENDA-5", but sometimes "SENDA-6" in replacement dashboards that were manufactured later.

The newer version, PCB always marked "SENDA-6", was used on Euro-3 motorbikes with AC headlight (dashboard 712412, 712417 and some others). As said, it cannot work with DC headlight, because the indicator is only turned on when the AC is in the negative half-cycle. So with DC that is never negative, this indicator will never turn on. However, there are solutions

Solution 1 - Use a small 12VDC relay that is energized from your DC headlight high-beam, and this relay switch the 12VAC from the Rectifier (probably a yellow wire) to pin 12 of the dashboard. So when you turn the high beam on, the relay is energized and the blue indicator will light up.

Solution 2 - Replace a few components on the dashboard PCB.

Old version for DC headlight :


New version for AC headlight :

Code: Selecteer alles

     Old    New
    
R1  470Ω   220Ω
R2   1KΩ   220Ω
Q1   A8A
C1  10nF
D2           JC

A8A = LMUN2211LT1G
JC = BAL74

Falstad simulation demonstrating both circuits with AC and DC headlight (use the switches).

[Stinos2000]

Nice that explains allot! I will see with my lab bench power supply if I can activate the led with a negative voltage. I thought that the indicator light did work when I changed to DC. My dashboard is a 712412 so is should only work with ac then.

[Stinos2000]

The problem you described may be caused by using the wrong kind of sparkplug, for example using a B10 instead of a BR10. Without the integrated resistor, there is a lot of high voltage parasites that can cause digital circuits to misbehave. Try with a new BR sparkplug, it may be as simple as that

The dashboard connector pitch is standard 0.1" (2.54mm) so you can make your own connector easily and try power the dashboard outside of the motorbike, with an external 230VAC to 12VDC power supply.

I will also try this. I think the problem started around the time I changed my sparkplug so that could be the case.

[Stinos2000]

I changed the sparkplug and that was the whole problem. I also had a problem with my speed being very inaccurate but that was also due to the bad spark plug. The only problem that I still have is the high beam indicator that is broken.