Canon Laser Shot LBP-5100, Руководство по обслуживанию

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Chapter 2
2-36
Once the protective mechanism has gone on, you must turn off the power (by turning off the power switch or disconnecting the power cord), leave the machine
alone for 3 min or more and then turn it back on to reset the low-voltage power supply.
2.7.1.2.2 Sleep function
0010-6168
LBP5000 / LBP5100
The machine is equipped with a mechanism to limit the consumption of power by the printer engine, controlled as follows by the instructions from the DC controller
PCB:
1) The DC controller receives the sleep command from the video controller PCB.
2) In response to the sleep command, the DC controller PCB stops the 24V output signal (REM24V, pulse signal) to the low-voltage power supply a specific period
of time thereafter.
3) When the REM24V signal stops, the low-voltage power supply circuit stops the power to the 24V and 5V systems used to drive various loads so that the printer
will assume the following state:
- Fixing temperature control: STOP
- Fan: STOP
- Motors: STOP
The machine resets itself from sleep mode in response to any of the following:
- when printing is started
- when calibration (manual) is executed
- when cleaning is executed
2.7.1.2.3 Connection Power Supply Detection
0010-6169
LBP5000 / LBP5100
The machine is capable of identifying the type (100V system or 200V system) of the low-voltage power supply used by the printer engine. The identification is by
the CPU with reference to REM24V: when a 100V power supply is connected to the printer engine, the REM24V signal will go High, while connection of a 200V
power supply will cause the signal to go Low.
2.8 ENGINE CONTROL SYSTEM
2.8.1 Construction
2.8.1.1 Outline
0010-7353
LBP5000 / LBP5100
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-2-39
2.8.2 DC Controller
2.8.2.1 Outline
0010-6171
LBP5000 / LBP5100
The DC controller is a circuit that controls the machine's various operation sequences, and is in turn under the control of its CPU. The following is a block diagram
of the circuit:
Engine control system
DC controller
Video controller
circuit
Laser exposure system
Pickup / feed / fixing system
Image formation system
Delivery system
External and control system