B. Engine Controller
1. Outline
The engine controller controls the operational sequences of this printer. It consists of the fixing
control circuit, high-voltage power supply circuit, low-voltage power supply circuit and fan
motor drive circuit. According to instructions from the CPU (IC201), the fixing control circuit
performs temperature control for the fixing unit, whereas the high-voltage power supply circuit
generates high-voltage power. The low-voltage power supply circuit generates the DC power
required in the printer. The fan motor drive circuit drives the fan motor following the instruc-
tion from the IC201.
Figure 2-2-2 shows the block diagram of this circuit and each circuit will be explained in the
following.
Figure 2-2-2
CHAPTER 2
2 - 5
IC201
CPU
Engine Controller PCB
Interface controller PCB
Fixing control
circuit
Low-voltage power
supply circuit
AC input
Main motor
Sensors
BD sensor
Scanner
motor
Cartridge
Laser driver
High-voltage
power supply
circuit
Sensor
Solenoid
Fan motor drive
circuit
Fixing unit
Transfer charging
roller
Pressure roller
Fan
Intermediate PCB
Содержание LASER SHOT LBP-1210
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Страница 191: ...APPENDIX I GENERAL TIMING CHART A 1 II GENERAL CIRCUIT DIAGRAM A 2 III LIST OF SIGNALS A 3 IV MESSAGES TABLE A 5 ...
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