HP LaserJet 1100 Service Manual - Page 41

Engine Control Unit ECU/power system

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Engine Control Unit (ECU)/power system The Engine Control Unit (ECU) coordinates all print engine activities, drives the laser, and coordinates print data from the formatter with the image formation process. The ECU also includes power supply and distribution circuitry. The ECU controls the following systems and functions: • Printer engine control • printer laser/scanner drive • paper motion monitoring and control • motor • Power system • AC power distribution • DC power distribution • overvoltage/undervoltage protection • high-voltage power distribution Figure 3-3 ECU loads 44 Functional Overview C4224-90962

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44
Functional Overview
C4224-90962
Engine Control Unit (ECU)/power system
The Engine Control Unit (ECU) coordinates all print engine activities, drives the laser, and
coordinates print data from the formatter with the image formation process. The ECU also
includes power supply and distribution circuitry. The ECU controls the following systems and
functions:
•
Printer engine control
•
printer laser/scanner drive
•
paper motion monitoring and control
•
motor
•
Power system
•
AC power distribution
•
DC power distribution
•
overvoltage/undervoltage protection
•
high-voltage power distribution
Figure 3-3
ECU loads