Hi Bruce, Thanks for the suggestion. It shows this banding even if the aperture is completely closed so I do not think it has to do with flicker of the light sources around. Sean On Wed, May 15, 2013 at 4:33 AM, Bruce Douglas wrote: > Just to make sure, have you tested this camera under sunlight as well? > High speed cameras have flicker and maybe banding under many types of > artificial light. > > On Tue, May 14, 2013 at 12:52 PM, Sean Breheny wrote: > > > OK, more interesting information: > > > > First, I looked at the auction photos again and I realized that I > > overstated the degree of evidence that this thing was working before > > shipment. I notice that the image shown is very blurry. It does not see= m > to > > have the bands of noise but it is not certain. > > > > I also noticed in my playing with the camera that focusing the lens > didn't > > seem to make any difference in the image. Not only was it noisy but > always > > blurry. > > > > So, I opened up the camera itself. I discovered that the CCD had a ligh= t > > blue IR cut filter glued to the top and that this filter had some kind = of > > residue on BOTH the outside and the CCD-facing surfaces which made it > very > > clouded. I was able to clean the front surface but I could not clean th= e > > inner one. Given that this sale was as-is, no returns, I took the risk, > cut > > through the glue beads, and popped the filter off the top of the CCD. > Thank > > God, it came off cleanly and indeed there is another piece of glass und= er > > it covering the sensor and that is clear. > > > > I have yet to reassemble and try the camera again but I suspect that th= is > > will make the image much better - although of course it will not do > > anything about the banding. > > > > Any idea how this would have happened? It almost looks to me like the > glue > > used to attach the filter eventually outgassed and clouded the filter. > That > > seems strange, though, unless someone modified the camera to add this > > filter and used the wrong kind of adhesive. > > > > Last night I removed the main board from the control unit and looked fo= r > > any evidence of failed capacitors, debris, flux residue, etc. I also > > inspected the several reworks to make sure they were not damaged. I > > re-seated all connectors and socketed ICs. No difference in system > > behavior. > > > > I scoped the power supply input to the main board (+5 and +12V from an > SMPS > > which is an external module) and it is clean. There is a DC-DC converte= r > > implemented with discrete components and a transformer on the main boar= d > - > > I have not yet verified whether that is working properly. > > > > The image on the screen has a menu bar to the right and that is crisp a= nd > > clear - the banding is only within the actual image from the camera. Th= is > > makes me suspect that it is not a problem with the main power supply or > > with the CRT driver board but rather something in the processing of the > > image or the power supply to the camera. > > > > Sean > > > > > > > > On Mon, May 13, 2013 at 4:54 PM, Mike Harrison > > wrote: > > > > > On Mon, 13 May 2013 16:42:46 -0400, you wrote: > > > > > > >Yes, thank you, I have already seen those. Unfortunately, the innard= s > do > > > >not seem all that close to mine but I still say that the device is > > similar > > > >because the user interface is identical and the outer appearance of > the > > > >case is similar. Also, the PCB inside the controller is silk-screene= d > > > >"Redlake Imaging" so it must be that Olympus hired Redlake to design > > this > > > >model. > > > > > > > >Sean > > > > > > Seems like there has been lot of re-badging and company takeovers ove= r > > the > > > years in the HS video > > > business > > > > > > -- > > > http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive > > > View/change your membership options at > > > http://mailman.mit.edu/mailman/listinfo/piclist > > > > > -- > > http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive > > View/change your membership options at > > http://mailman.mit.edu/mailman/listinfo/piclist > > > -- > http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive > View/change your membership options at > http://mailman.mit.edu/mailman/listinfo/piclist > --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .