Troubleshooting; Bright Or Dark Spots - OCI BDL800IR Instruction Manual

9 Troubleshooting

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9.1 Bright or Dark Spots

Both of these phenomena are due to particulate grids contamination. Whether it's bright or
dark depends on which grid the contaminant is attached to. In either case, grids must be thor-
oughly cleaned (see Section 8.1).
The following images show the grid before and after contamination.
Chapter 9 Troubleshooting 59