DC controller The DC controller controls the operational sequence of the product. Figure 1-3 DC controller diagram Cartridge (x4) DEV high-voltage power supply Motor Fan TR1 high-voltage power supply Solenoid ITB unit Switch TR2 high-voltage power supply Secondary transfer roller Photointerrupter DC controller Fuser LED Sensor AC input Fan Low-voltage power supply Switch Option Formatter Laser scanner unit Control panel The DC controller controls the product's electrical components, listed in the following table. 8 Chapter 1 Theory of operation ENWW