Fans The product uses to fans to maintain the correct internal temperature. The DC controller determines a fan failure when a fan locks for a specified period after it starts driving. Figure 1-5 Fans Power supply fan (FM1) Fuser fan (FM2) Table 1-4 Fans ENWW Engine-control system 13 Description Area cooled Type Speed Power supply fan (FM1) Low-voltage power supply Output bin Delivery unit Laser scanner unit Intake Full/Half Fuser (FM2) Duplex feed unit ITB area Intake Full