HP P3005 - LaserJet B/W Laser Printer - Page 65

Engine control unit (ECU)
The ECU coordinates all device functions, according to commands that the formatter sends. It drives
the laser/scanner system, the image formation system, and the pickup/feed/delivery system.
The ECU contains the following components:
●
Engine controller PCA
●
Low-voltage PCA
Figure 4-2 Print engine general structure on page 47 shows the relationship of the ECU to the pickup/
feed/delivery system, the laser/scanner system, and the image-formation system.
Figure 4-3 Engine
control system circuit diagram on page 48 provides the ECU circuit diagram. Figure 4-4 Low-voltage
power supply circuit diagram on page 49 shows the low-voltage power supply circuit on the ECU.
METSYS RENNACS/RESAL
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Tray 1 pickup unit
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Figure 4-2 Print engine general structure
ENWW Basic operation 47