Specifications

Appendix B - Maintenance
Page 35
B. Appendix B - Maintenance
This appendix describes the maintenance items you should know about with your CCD camera
system.
B.1. Replacing the Fuse
The CPU is internally fused with a 2 amp fast blow fuse. The fuse is located inside the CPU box
on the printed circuit board. Remove the four screws on the bottom of the CPU box to access the
fuse holder.
B.2. Disassembling/Reassembling the Optical Head
In order to gain access to the CCD for cleaning or desiccant removal, please follow these
instructions or return to the manufacturer for service.
1. Remove the four screws holding the front cover onto the camera and set the
cover aside.
2. Remove the shutter/filter wheel from the camera by pulling it straight up out
of the camera, lifting it off the axle.
3. Remove the three hex-head screws that hold the inner housing into the
camera. The inner housing covers the CCD, making a hermetic chamber for
the CCD and desiccant. Lift the inner housing and set it and the O-Ring
aside.
At this point you have access to the CCD and all the windows in the system as well as the
desiccant pack. To reassemble the camera please do the following:
1. Make sure the desiccant packet is in place below the CCD so that it may be
captured by the inner housing. You may find it necessary to take the two
outer corners of the desiccant and turn them inwards, making the rectangular
packet somewhat conform to the round outline of the inner housing.
2. Seat the O-Ring in the groove in the bottom of the inner housing and gently
place the inner housing down into the camera. Place careful attention to not
pinching the desiccant packet under the seat of the inner housing. The
proper orientation of the inner housing is with the window over the CCD.
3. Tighten each of the three hex-head screws one-half turn at a time until the
inner housing is seated completely and flatly into the camera.
4. Place the shutter/filter wheel back into the camera with the side containing
the small reference marks and the larger brass bearing towards the CCD.
You will have to slightly deform the O-Ring that surrounds the wheel against
the shaft of the motor and be careful not to pinch or tear it.
5. Replace the front cover, noting that there is only one orientation that will fit
as the four mounting screws are at irregular angles.
B.3. Cleaning the Optical Windows
The design of the ST-5C allows for cleaning of the CCD. The optical heads are not evacuated
and are quite easy to open and clean. Follow the instruction in the section above to gain access
to the CCD and clean it using one of the following 3 methods:
1. To remove dust from the windows, a can of dust remover can be used but be
careful to hold the can in the proper orientation. If you tilt the cans too far