Category Archives: General topics

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Damaged screw


Case You have to screw out a bolt with damaged head (after forcing a stucked screw with the screwdriver can happen to damage the PH00 slot), You have 2 possibilities: to cut a simple straight slot with a small grinding … Continue reading

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Soldering irons: Weller and Fahrenheit


I need at least 2 soldering irons: a “normal size” for everyday use, and a tiny one, with the tip like a needle. A good Weller station is a lot of money, so i decided to use a Fahrenheit 28011 … Continue reading

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SD-card – not working


Case You have a 500d (or any other camera, using a SD-slot), can happen, that the camera does not feel the inserted card, or gets the false information, that the card is write-protected. The cause is in most of the … Continue reading

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Not starting DSLR – and the shorted motor


I had to repair an old 40d (but in this case could be ANY other Canon DSLR), which did not start at all. No message on the displays, nothing. After inserting the battery there was a very tiny “tick” noice … Continue reading

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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 https://en.wikipedia.org/wiki/Dichloromethane 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