630 brand new wheel fails drop BiT

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630 brand new wheel fails drop BiT

Postby Pyaka » August 1st, 2018, 5:07 pm

I have replaced both wheels and the battery trying to resurrect my poor roomba. On the BiT it fails the wheel drop test for the left wheel which is a new replacement from irobot. I tried messing around with the drop switch; taping it shut, cutting one wire to force an open circuit and connecting the wires to force a closed circuit, but it still fails the test. I'm guessing this is a problem with the motherboard? What should I try next?
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Re: 630 brand new wheel fails drop BiT

Postby Pyaka » August 3rd, 2018, 4:54 pm

Anyone? Sir Gordon? :D
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Re: 630 brand new wheel fails drop BiT

Postby vic7767 » August 3rd, 2018, 5:33 pm

It could be a dirty contact (or broken) that the wheel paddleboard plugs into on the circuit board. May be easier to replace the board than to attempt tracing out the circuit board copper traces.
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Re: 630 brand new wheel fails drop BiT

Postby a1robotrepair » August 3rd, 2018, 7:46 pm

I have repaired a few shorted drop sensor board problems.
The circuit is very basic.
I did not right down the trace, cleaning the board fixed some, on one I opened the circuit so that it would not detect a wheel drop.
The trace is relatively easy.
It has been a few years, old 530s would have this problem.
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Re: 630 brand new wheel fails drop BiT

Postby Pyaka » August 4th, 2018, 3:46 pm

Ok, thanks very much! I will open it up and research how to trace a circuit.
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