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Old Mar 21, 2008, 3:58 AM   #21
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Oh,

Please note that you should have another camera to save the entire disassemble process. as you could make several faults especially in case you were tired.

So, it's also better to have a small nap or you could damage your camera.

This is the first fault I did. As I assembled the Basklight power jack incorrectly. I attached that jack in the video out connector.

Sorry Minolta!

I know that won't affect the electrical parts inside the camera.but it's better to use different colors for these two connectors.

If you made this mistake so the 2.5" Backlight won't turn ON.
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Old Mar 21, 2008, 4:00 AM   #22
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Hi again,

The time I tried to disassemble the front cover. it was very difficult to find this hidden scrow.

Also the available service manual didn't help!

it took about 20 minutes to find it!

So take care!


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Old Mar 21, 2008, 4:04 AM   #23
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When you reach this area, pleae take care from the huge capacitor.

it's high voltage!

this time I didn't do any mistake.

I used a 100 K OHM 0.5W resistance to dischrgeit.
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Old Mar 21, 2008, 4:09 AM   #24
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I re-assembled the camera.

Unfortunately the wire was connected incorrectly behind the orange ribbon. So the camera failed to sync. during flash.

Some pictures were dimmed and the others were white!!!!

I heared as if there were a spark inside the camrea each time I use the Flash.

I took my nap, then I diassembled the camera again, and I found a damaged wire!

I repaired that......
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Old Mar 21, 2008, 4:11 AM   #25
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Cold welding was detected using Hot Air Gun (177 C)

I selected this area under the CF Card, which normally produces heat.
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Old Mar 21, 2008, 4:19 AM   #26
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Now, let's talk a little bit about cooking.

I read several ways used to cook a PCB.

1- The secret is don't wrom-up at allto more than 210 C.

2- raise up the temperature slowly (you should put the PCB from 70 C)

3- open the sterilizer door and remove the power cord as you reach 210 C

4- 210 C should be kept for 20 seconds only

5- if you reached 230-240 C so you can see the POP-Corn!

6- Try first on several old PCBs

8- open the door when ready

7- keep it to cool down until it reaches the 50 C.

attached several old boards

i.e IDE 2.5 inch HD - Old BGA processor - OLD IDE 3.5" ...




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Old Mar 21, 2008, 4:21 AM   #27
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you should calibrate your sterilizer first.

Also you can use a toaster. But, don't miss to put an internal thermometer in this case as the available thermeter couldn't be accurate.
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Old Mar 21, 2008, 4:24 AM   #28
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Go to your dentist and ask himto make an X-Rayfor the PCB before and after cooking.

Please note that I added an external PLCC flash just to differntiate.

The attached snapshot was for the last X-Ray.




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Old Mar 21, 2008, 4:30 AM   #29
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LOL

These 3 X-Rays were amazing.

X-Ray can detect the probalbily of pop corning.

in that case you can find several unarranged tin points in the board.

In that case you should't assemble the camera.

You should run into re-work option, and I think that you should have more professional tools to do that.

Don't let it boils!
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Old Mar 21, 2008, 4:41 AM   #30
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I cooked the two adjacent boards.

My final notes are:

1- Don't use external batteries for the camera.

2- You should use a current limit circuit to reduce the current, in case youare enforced to use external battery pack,as any extra current would worm-up the camera.

3- Don't use the camera continuasly, for more than one hour, and if you do so, be careful not tohit the cameraon the table while it's hot. (I think I did that....) that could cause a track line orBGApinseparation!!!!!!!!!!!!!!!!!!!!!!!!



Now my camera reterned to its normal live.

I made about300 JPGs and everything are going well

you can find aregistered dentalcase using Minolta Dimage 7 by visiting the following link:

I used an old HD cylinder for reflection.

http://gcgradia.gceurope.com/en/dire...ndex.php?cc=30

Also my site is located here:

(itonly includes my information).

http://www.dentist.20fr.com



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