Brother HL-1260 service manual Engine Controller Circuit

1.3 Engine Controller Circuit

	Scanner Unit
	Primary charging roller
	Transfer roller
	High-Voltage
	Power Supply
	Assy
	Developing cylinder
	Toner sensor
Engine
Controller	Pick-up Solenoid
Circuit
	MP Tray Pick-up Solenoid
	Paper Feeder
	PCB
	Pick-up Motor
	Detectors

Main Motor

Fixing Unit

Low-Voltage

Power Supply

Assy

Figure 3.5 Engine Controller Block Diagram

Components in the Circuit (refer to the next page)

A.Engine Control CPU

B.Low-Voltage Power Supply Connector

C.Fuser Unit Control C-1. Heater Drive Circuit

C-2. Heater Temperature Input Signal

C-3. Paper Eject Input Signal

D.Paper Feeder PCB Control Signals and Connector

E.Option Interface Circuit and Connector

F.High-Voltage Power Supply Control Circuit and Connector

G.Scanner Unit Control

G-1. Scanner Motor Control Circuit

G-2. Laser Diode Drive PCB Control Circuit

H.Fan Motor Drive Circuit

I.Main Motor Control Circuit

J.Cover Open Detect Circuit

K.Safety Door Switch Circuit

III - 7