Category Archives: General topics

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No ideea what is wrong – search for the screws

As You know, there are some cameras with typical falling out screws, which can make problems (7d, 5dI, 40d…). I had to repair a 17-85 IS – always the same, aperture flex broken, and as a second mandatory thing, cleaning … Continue reading

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AF sensor feedback LED dislocated

During my ten years of repairing I have seen several times cameras with dislocated AF point LED-s. The symptom:  you can see only a very dimmed red light or nothing at all. In some cases the problem is the dislocated … Continue reading

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Solvent for the cemented lens (not with canada balsam)

Case You want to dismantle a glued (cemented) lens, try to use this: 70% dichlor-methane 20% methanol and 10% ammonia solution (I think 40%). Be carefull, dont swallow them, they all are dangerous.. After ca 1-2 days of soaking, you … Continue reading

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Canon 40dcmos – with no Bayer-filter!

After long trials yesterday I managed to eliminate the complete Bayer-mask from a Canon 40d sensor. No scratches, no damage – just a beautiful golden mirror. Not very simple – and definitely NOT only by scratching it with a piece … Continue reading

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The PH00 screwdriver – the MOST impotant tool for us

Theoretically Canon uses a JIS standard screwdriver. I had bought one for a LOT of money, and… it was worst, that the PH00 screwdrivers. So – nevermore. But which PH00 screwdriver, if you need one?   I can advice you … Continue reading

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Canon 40d motor revival in the body of a 7d

This is a story about my own 7d, which has been flooded with water, before I have purcesed it “as it is”, practically not working. I repaired it in a few hours -worked well after. After a certain time stopped … Continue reading

Posted in 40d, 7d, General topics | 7 Comments

Check and repair of a non-working shutter unit

  Canon 40d is renamed for the shutter failures. By my experience there are wo mail possible reasons: the copper wire on the coil is too short, and after a certain time they just break because the moving. This can … Continue reading

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