AC Power Distribution The AC power circuitry supplies AC voltage whenever the power cord is connected, and the power switch is on. A toner cartridge must be installed and the top access door must be closed before AC voltage is supplied to the DC power circuits or the Fusing Assembly. Overcurrent/Overvoltage Protection There are two overcurrent/overvoltage devices in this printer: G The resettable circuit breaker (CB101) shuts off AC input power to the LVPS in case of an AC overcurrent condition. To reset, remove the LVPS and press in the circuit breaker button (figure 5-3, callout 1). G Fuse 101 interrupts AC input power to the +24V DC and +5V DC power circuits.
To check or replace the fuse (figure 5-3, callout 2) you must remove the LVPS. Figure 5-3 Low Voltage Power Supply 94 Chapter 5 Functional Overview C4085-91087