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micro soldering

My Cateye velo5 bike computer stopped working, after taking it apart and looking at it under a microscope few solder joints on the smd components are cracked. Those capacitors and resistors are 1.5mm long and about 1mm wide, really tiny ! You can see the capacitor in the middle, the solder joint is cracked.

Good old lead based solder fixed the problem.

 

I also took a ohm reading of the contacts on the monting bracket with the reed switch in close position and it was 2 to 5M ohm...

the contacts were pressed in the insulation of the wire, "scotch lock style"...

I done the connection properly with solder and now the connection is good, 0 ohm.

The odometer is working perfectly now.

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Uploaded on August 4, 2021
Taken on August 3, 2021