Canon Color imageCLASS MF621Cn
Troubleshooting. Test Print. Engine
The engine test print is to check normal operation of the device. Print the engine test chart in the following steps.
1. Leave the front cover(1) and the rear cover(2) open to turn on the power.
2. Close the Front Cover (1) and the Rear Cover (2) within 5 seconds since the Control Panel lights up white.
3. The engine test chart is printed in the horizontal line patterns on a sheet as shown below.
