Canon i-SENSYS LBP5300 Series, Service Manual

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Chapter 2
2-38
This function is to save the power consumption of the printer and is controlled by the DC controller.
The sequential operation of this function is described below.
1) The DC controller receives a sleep command from the video controller.
2) The DC controller outputs the POWER SAVE MODE signal (PSREM24V) to the low-voltage power supply circuit upon receipt of the command.
3) The low-voltage power supply circuit stops 24VA power supply from the 24V generation circuit upon receiving the PSREM24V signal.
The printer returns to the WAIT period, once it receives the command releasing the POWER SAVE mode from the video controller.
2.8 ENGINE CONTROL SYSTEM
2.8.1 Construction
2.8.1.1 Outline
0013-8427
/ i-SENSYS LBP5360 / i-SENSYS LBP5300
The engine control system is the "brain" of the machine, and has control over its laser exposure system, image formation system, pickup/delivery system, fixing
system, and externals/auxiliary control system. The following is a block diagram of the engine control system, followed by descriptions of individual circuits:
F-2-48
2.8.2 DC Controller
2.8.2.1 Outline
0013-8418
/ i-SENSYS LBP5360 / i-SENSYS LBP5300
The DC controller is to control the operational sequence of the printer, and is controlled by the CPU in the DC controller.
The operation of the DC controller is described below.
1) When the power switch is turned ON, the DC controller is supplied with DC power from the low-voltage power supply unit.
2) The CPU in the DC controller starts to control the printer operation.
3) When the printer enters STBY period, the CPU sends signals to drive each load, such as laser diode, motors, solenoids, and etc. according to the print command
and the image data sent from the video controller.
Engine control system
DC controller
Video controller
circuit
Laser exposure system
Pickup / feed / fixing system
Image formation system
Delivery system
External and control system