HP P3005 manual Engine control unit ECU, Formation roller

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 4-4Low-voltage power supply circuit diagram on page 49 shows the low-voltage power supply circuit on the ECU.

Output bin

LASER/SCANNER SYSTEM

Scanning mirror

Laser	BD
diode	circuit

Scanner motor

	IMAGE	Primary
		charging
	FORMATION roller		Developing
	SYSTEM		unit
			Photo-
	Cleaning unit		sensitive
Rear	Fuser		drum
output bin		Transfer
		charging
		roller
	Duplex feed unit
	Tray 2		Tray 2
		pickup unit

ECU

Engine controller	Formatter
PCA
High-voltage	Option
Power supply PCA

Tray 1

Tray 1 pickup unit

PICKUP / FEED

SYSTEM

Figure 4-2Print engine general structure

ENWW Basic operation 47