Canon LBP-1120 Service Manual page 24

CHAPTER 2
2. Operations
a. CPU (IC201)
This printer contains an 8-bit single-chip microcomputer for its CPU.
This CPU is a single-chip CPU with a built-in ROM and RAM. It performs the controls for the following items
based on the control program stored in the ROM.
1) Printer sequence.
2) Video interface.
3) High-voltage power supply circuit.
4) Laser/scanner.
5) Sensors.
6) Loads (motors, solenoids, etc.).
b. Reset IC (IC202)
IC202 monitors +3.3V and resets the CPU when the power is turned ON.
c. Fixing Control Circuit
See the section "B. Fixing Control Circuit" in this chapter.
d. High-Voltage Power Supply Circuit
See the section "C. High-Voltage Power Supply Circuit" in this chapter.
e. Low-Voltage Power Supply Circuit
See the section "D. Low-Voltage Power Supply Circuit" in this chapter.
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