Lexmark Optra C Service Manual - Page 35

5045-001 Mechanical Controller Board Information The mechanical controller board (MCB) controls the various loads in response to signals received from the DC controller board (DCCB). The MCB then returns the status signals to the DCCB. The MCB controls the pick-up PCB, the high voltage power supply PCB, and the paper feeder driver PCB by way of the serial communication. The mechanical controller board also provides: • Drive for the various motors and fan motors • Control of the toner carousel, fuser transfer drum and peripheral units • Toner stirring, toner low detection and toner cartridge detection • Photosensitive drum life detection • Waste toner collect system control • Power saving mode control Note: There are two non-replaceable fuses on the MCB. They are labeled FU2001 and FU2002. If a short occurs on the various solenoids, or if you ground the wrong side, these fuses could open. Diagnostic Information 2-3