weighbridge power problem

[jimlad]

Hi there,

I have a mobile weighbridge that when i plug in a info input cable I get a fault code 'help' on the display, this usually has meant that there is not enough power.

I have bought new universal power input but this didn't solve the issue, which makes me think there is a faulty part on the circuit board, perhaps a power regulator of some sort? I really am out of my experience zone at this point.

photos of circuit below with power input at red circle.



Any help much appreciated, s short film showing the fault in action

I am in the Netherlands if by chance there is anyone that thinks they can fix this in NL, let me know

Cheers
Jim

 

[KlausST]

Hi,

i assume it´s not the power supply.

Maybe the cabling to the sensor. Did you open the connector?


Klaus

 

[jimlad]

Hi, I bought a new power supply and then bought another as i thought it didn't have enough mA, this didn't help

- - - Updated - - -

Maybe the cabling to the sensor. Did you open the connector?

there are two cables leading to two weigh sensors, both cables give the same result, I assumed they couldn't both go wrong in the same way at the same time.

 

[BradtheRad]

The red wire is connected in a way that isn't clear. It looks as though it is soldered to a pin, and also to a copper trace?

Furthermore the trace has scratch marks a short distance away, as though done deliberately to break contact. These areas are circled in the closeup.

I don't know that these are a problem. I'm merely pointing these out because the red wire is the only jumper on a very orderly board.

 

[jimlad]

thanx for your reply, I see what you mean, it's not a recent addition but it does look strange indeed.