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I am researching where the A/D converter and the Digic processor are located. The rear 'L' shaped board is known as the Main System Board and the Digic may reside there but seems to be un-marked in the 450, as it is in later models. The A/D converter I believe is on the daughter board in back of the sensor, It would get cooling from the cold finger. If anyone can find a block diagram or schematic of the camera it would really help.
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