2. Operation of each block
a. CPU (IC501)
The CPU is a 8-bit 1-chip microprocessor. It is a 1-chip type CPU with built-in ROM and RAM.
According to the control programs stored in the ROM, it controls the following operations of the
printer.
1) Printer sequences
2) Video interface
3) High-voltage power supply circuit
4) Laser/scanner
5) Sensors
6) Loads such as motor, clutch and solenoids
7) Communication with options
b. Reset IC (IC502)
IC502 mo3.3V and resets the CPU when the power ON.
c. Regulator (IC503)
IC503 gen5V from +24V supplied from the low-voltage power supply circuit. This +5V
is supplied to the laser driver and video controller.
d. Fixing heater control circuit/fixing heater safety circuit
See “B. Fixing Control” in this chapter for details.
e. High-voltage power supply circuit
See “C. High-Voltage Power Supply Circuit” in this chapter for details.
f.
Low-voltage power supply circuit
See “D. Low-Voltage Power Supply Circuit” in this chapter for details.
2 - 5
CHAPTER 2
Summary of Contents for LBP1760P
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