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4. Generating Test Patterns
The video controller has a RAM area for generating test patterns; using a channel independent from
that of the video signals from the image processor PCB, the signals are synchronized for the sub scan-
ning direction to generate video signals.
Address data for test patterns is generated in response to the ITOP signal, and addresses are assigned
in the RAM for gamma correction. The selected video data is read from the RAM and sent to the laser dri-
ver.
For how to generate the test patterns and sample images, see the Service Handbook.
Figure 3-416
OPERATIONS AND TIMING
3-71
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