A dry clean store manager brought me a bench scale that weight up to 60 kilos. As he explained the problem and powered up the device. I could see this message on the screen.

I have never worked on devices like this before.

I explained that to the customer and he asked me to check it out and see what I can do with it.

This is the specs information found in the back of the device. As I took the screws off and exposed the inside board looking for something obvious but sad to say there was nothing wrong there.

That is the frond side of the device and there was nothing wrong with it.

This is the back side of it and I could not find anything wrong here either.

This is the socket with all these colored wires that goes down to the scale sensor plate. I was hoping to find something loose or broken but there was not.

There was a cable connected to the actual scale plate that comes out of this socket and goes to the other side of the device. I wiggled that and to my surprise the error message was gone. As I moved the scale again, the error message came back. My focus was shifted to the actual cable that connected between the logic board and the sensor plate and these was my next step.

As I pull the cable that has all these wires in, I came across this. It was not completely broken. The green wire was the main issue and it was connected to only on a thread of the wire. I cut the cable open and attached fixed the cable. To my surprise, it fixed the problem but the moment I shake that wire, the problem happens again.

I traced the cable down to the sensor plate to see if I have a loose wire there but to I could not find anything. I unscrewed these hex screws off to expose the inside sensor and the cable.

This is the scale sensor and the cable attached to it. It was full of dead insects and cockroaches but the photo you see was taken after the cleaner with air blower. It was disgusting.

Since these were in good order, I closed the lid and focused more on the top side of the cable.

As I checked the cable again for loose connections starting from the top like I should have done earlier; I found a loose connection with the black wire.

I soldered that as well and the turned the scale on again, the error message was gone even after I shocked the cable very hard.

I looked at the soldered wire and I thought to myself that does not look good. It is about the repair and since it was for a dry clean store, it had to look good too. With that in mind, I cut the ugly part of the wire off and then soldered it to the socket on the device that connects to the logic board.

So the repair was successful and at the same time, looked good. As I gave the scale back to the customer and saw the pleased look on his face, I can say with contend: Mission accomplished.

This article was prepared for you by Waleed Rishmawi, one of our ‘Master Authors’ and currently working in the Bethlehem area of Palestine repairing electrical and electronic equipment.

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Note: You can check his previous repair articles in the link below:

https://www.electronicsrepairfaq.com/samsung-smart-phone-j710fn-repair-j-series