110 Theory of operation ENWW
DC controller PCB
The DC controller PCB is controlled by the CPU on the DC controller. It controls the operation
sequences of this printer.
The following is the sequence of the DC controller PCB:
1 The power switch is turned on, the DC controller is supplied with the DC power from the low-
voltage power supply unit.
2 The CPU starts to control the operations of the printer.
3 When the printer enters the STBY period, the CPU sends signals to drive each load (such as
the laser diode, the motors, and the solenoids) based on the print command and the image
data received from the formatter.
The block diagram of this circuit is illustrated in Figure 5-4.
Note See the General circuit diagram in chapter 7, for detailed information on the printer circuitry.
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