Lexmark Optra C Service Manual - Page 124

5045-001 Service Technician Adjustment Initialize as the service technician adjustment mode, and that function operates instead of the density adjustment function. At this time, the "Bk" indicator flashes to indicate the service technician adjustment function if the panel is not OFF. 1. Press the power switch while holding down the TEST PRINT key to initialize the service technician adjustment mode. 2. Press the COLOR SELECT key and select an adjustment item. The LEDs for the currently selected adjustment item and that adjustment value flash. The correspondence between the COLOR SELECT LEDs and each adjustment item is as follows. 3-19