40d – killed by soldering

The sympthom: no sign of life by a 40d.

Repair: as the single fuse, which is in a 40d was ok, I’ve changed the DC-DC panel (unfortunatelly I had one from a dead body). After this, the body worked perfect.

I was very upset about this DC-DC panel, so I decided to investigate the bad part on the pcb. I opened the metallic shield – nothing to see.

A few weeks ago I’ve purcesed a small 10x/20x stereo micrscope – very good for soldering or to check a pcb. So I “scanned” the whole surface.

Do You see the problem? Between two pins of a tiny smd transistor (or what it is)  there is a small tin-ball – produced by somebody who repaired the camera before. The ball was “glued” to it – or rather was welded to the pins.

Be careful by soldering a pcb!

And buy a good microscope (it was only 80 USD).


About canonrepair

Ruzsa János. Amatőr fotós, Canon DSLR váz. Amateur photographer. Canon DSLR user.
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