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Archive 2006 · Dissected my dead 20D...with photos!

  
 
Xavier Rival
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p.3 #1 · p.3 #1 · Dissected my dead 20D...with photos!


Ouch!!! Just looking at these pictures hurts. Sorry for the loss. But, as others said, this set of pictures are a nice contribution.


Nov 04, 2006 at 11:41 AM
Tom_W
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p.3 #2 · p.3 #2 · Dissected my dead 20D...with photos!


nads wrote:
Unless I'm missing a bit, it looks like there aren't too many critical parts located in the right grip of the body. They should change the form factor of the next rebel to resemble the AE-1. I'd buy one just because it looks cool.


One major critical part inside the right grip - the battery!

Actually, it's quite amazing how much circuitry is stuffed into these bodies.



Nov 04, 2006 at 11:55 AM
pauljas
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p.3 #3 · p.3 #3 · Dissected my dead 20D...with photos!


you could use this experience to learn how to do your own custom conversions such as removing the AA filter or IR conversion. IR conversion runs$350. Thanks for posting


Nov 04, 2006 at 12:19 PM
nathanlake
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p.3 #4 · p.3 #4 · Dissected my dead 20D...with photos!


Just a hint....If you get salt water inside your camera, and you want any hope of it being fixed, immediately remove the batteries, flush it with fresh water and then as soon as possible flush it with alcohol. Remove the back and allow it to dry.

Salt water will begin to corrode contacts within minutes. Fresh water will take a bit longer and alcohol does minimal corrosion (although it may affect other things).



Nov 04, 2006 at 12:36 PM
dgsphoto
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p.3 #5 · p.3 #5 · Dissected my dead 20D...with photos!


nathanlake wrote:
Just a hint....If you get salt water inside your camera, and you want any hope of it being fixed, immediately remove the batteries, flush it with fresh water and then as soon as possible flush it with alcohol. Remove the back and allow it to dry.

Salt water will begin to corrode contacts within minutes. Fresh water will take a bit longer and alcohol does minimal corrosion (although it may affect other things).


Definitely worth a try if one is on the brink of loosing the equipment. Fresh water might work wonders. But don't forget to to detach the parts to be "washed" from the main body before trying it. And after the fresh water, use lots and lots of canned air.



Nov 04, 2006 at 01:14 PM
gmr2048
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p.3 #6 · p.3 #6 · Dissected my dead 20D...with photos!


Michael-M wrote:
kinda wierd that the chip in DPR's review says "Digic II", but the one in you pics doesn't eh?...........makes me wonder if we all got what we paid for.


Being semi-paranoid, that's exactly what I thought when I saw "Digic" and not "Digic II". I'm guessing the one on the dpreview site is a marketing shot/illustration, seeing as how that chip doesn't have any of the other identifying information that mine does.

-gary



Nov 04, 2006 at 01:38 PM
gmr2048
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p.3 #7 · p.3 #7 · Dissected my dead 20D...with photos!


Michael-M wrote:
one question, is the sensor sealed to the frame behind the shutter?


Yeah, the sensor seems to be bonded to it's frame, seen in this image,

http://www.pbase.com/gmr2048/image/69559262

with some black epoxy-looking stuff. I removed the two screws you can see in that image, as well as one in the rear, that appear to attach the sensor to the sensor frame, but the two stayed locked together.

-gary



Nov 04, 2006 at 01:45 PM
nads
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p.3 #8 · p.3 #8 · Dissected my dead 20D...with photos!


Nah, you don't need a battery!

The XT grip is so small that they could change the form factor of the battery and pull off that body style if they wanted to. Kind of like Leica did with that new/old one of theirs.



10DFT wrote:
One major critical part inside the right grip - the battery!

Actually, it's quite amazing how much circuitry is stuffed into these bodies.




Nov 04, 2006 at 03:15 PM
Michael-M
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p.3 #9 · p.3 #9 · Dissected my dead 20D...with photos!


thx for the answers Gary.................in my younger years i use to take apart almost anything i bought to see what made it tick................you just saved me a lot of time........


Nov 04, 2006 at 05:14 PM
JohnJ80
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p.3 #10 · p.3 #10 · Dissected my dead 20D...with photos!


Michael-M wrote:
thx for the answers Gary.................in my younger years i use to take apart almost anything i bought to see what made it tick................you just saved me a lot of time........


.... and money.

J.



Nov 04, 2006 at 06:47 PM
RDKirk
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p.3 #11 · p.3 #11 · Dissected my dead 20D...with photos!


That was very graphic and not for the squeamish.


Nov 04, 2006 at 07:30 PM
gmr2048
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p.3 #12 · p.3 #12 · Dissected my dead 20D...with photos!


Hi gang. I posted 30+ more photos. Getting to the core now. Not much left to remove.

The new stuff starts here, on page 7 of the gallery:

http://www.pbase.com/gmr2048/20d-dissection&page=7

with the image "Shutter button wiring".

--
-gary
http://www.eighteenpercent.net



Nov 09, 2006 at 11:29 PM
Xavier Rival
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p.3 #13 · p.3 #13 · Dissected my dead 20D...with photos!


Hi, I looked at the last pictures you posted and had the following comments (I hope someone will just correct me if I am wrong; but I think this series is too interesting to not try to gather some more knowledge ):

- I believe that sensor 1 is for metering. Moreover I remark a kind of 5x7 matrix on it, which I assume corresponds to the 35 zones metering. Opinions ?
- I would assume that sensor 2 is for metering too mainly because I do not see how sensor 1 would allow dealing with partial metering directly (or they just extrapolate it from the 35 zones ? this would not be very precise). In case you could do a macro of it, it could be quite interesting...
- The mirror in the bottom of the lens mount area probably hides the AF sensor. It would be very useful to know what this one looks like. The main mirror should let some light go through it and be reflected by the second smaller mirror to the AF sensor.
- What is the black frame in the last picture made in ?



Nov 10, 2006 at 12:00 AM
Zeder
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p.3 #14 · p.3 #14 · Dissected my dead 20D...with photos!


FANTASTIC! Now I don't have to look inside mine! I am very confident my camera would never work again if I had to reassemble it! Thanks for saving me the $$$!


Nov 10, 2006 at 03:11 PM
Bearmann
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p.3 #15 · p.3 #15 · Dissected my dead 20D...with photos!


Yes, I thought it was like driving by an auto accident too. I couldn't help but look! So when are you going to put it up on ebay?


Nov 10, 2006 at 06:01 PM
gmr2048
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p.3 #16 · p.3 #16 · Dissected my dead 20D...with photos!


Another update. I'm down to the last few bits I can disassemble. The latest shots are of the dissected AF mirror/prism/sensor box, which lived at the bottom of the mirror chamber. Images can be seen here:

http://www.pbase.com/gmr2048/image/70188802

http://www.pbase.com/gmr2048/image/70188803

http://www.pbase.com/gmr2048/image/70188806

http://www.pbase.com/gmr2048/image/70188807

http://www.pbase.com/gmr2048/image/70188809

http://www.pbase.com/gmr2048/image/70188812

--
-gary
http://www.eighteenpercent.net



Nov 13, 2006 at 09:36 PM
OceanView
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p.3 #17 · p.3 #17 · Dissected my dead 20D...with photos!


Thanks for the detailed photos.
Just wondering how long it took you to actually disect the camera.




Nov 14, 2006 at 12:05 AM
Xavier Rival
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p.3 #18 · p.3 #18 · Dissected my dead 20D...with photos!


Nice work, it was interesting to see the inner parts of this AF module.


Nov 14, 2006 at 12:09 AM
roly72
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p.3 #19 · p.3 #19 · Dissected my dead 20D...with photos!


i can see a long post coming up in the buy and sell forum under "replacement parts for 20D"


Nov 14, 2006 at 07:22 AM
gmr2048
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p.3 #20 · p.3 #20 · Dissected my dead 20D...with photos!


Hahaha! Not a bad idea, Roly!

OveanView: It's been about two weeks on-and-off that I've been working on the disassembly. It's been a busy time, so I haven't been able to dedicate a ton of time to the project. The job is mostly done at this point, but I think I still have a couple of pieces to dig into (the top of the camera with the built-in flash comes to mind). I'll post again if I find something interesting!

Thanks for checking it out.

-gary



Nov 14, 2006 at 11:52 AM
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