Re: S3-IS E18 ZoomLensError0004 diagnosing
Canon camera does not like to see its lens barrel not moving. That's your cam's Err 18.
Please see the set of pictures show here:
The last pic has the close-up of the optical encoder wheel (many slits).
--- In email@example.com, "cybertheque_museum" <msg@...> wrote:
> I am working on an S3-IS which powers-up, extends the lens barrel but powers down instantly if the zoom switch is operated in either direction. The firmware status screen in Transfer Mode displays "E18 ZoomLensError0004". I have disassembled the camera and verified that the large ring gear at the base of the lens barrel is clean and well lubricated. Using "chdk" firmware, I am able to shoot photos using a script but not by using the shutter button, at the setting of the lens on powerup. Activating the zoom switch while using that firmware produces absolutely no effect.
> I would appreciate a description of what the lens actually does on a good camera at powerup, and what it does when the zoom lever is operated (are there an internal movements visible through the glass?).
> Does anyone know what is contained in the "service manual" for this model (any data beyond flowchart subassembly replacements?)
> A technology description of this model states that the zoom ultrasonic drive motor is "two speed"; I wonder if this means two separate stators or just speed regulation in the drive electronics.