HP LASERJET 5100LE Manuel d'utilisateur télécharger pdf (Page 79)

Q1860-90918 Chapter 5 Functional information 77

Motors

See the timing diagram on page 102 for specific timing details for the printer motors.

The dc controller board regulates the main motor (M1). The main motor drives the main gear

assembly and rotates during the initial rotation period (following power-on), the print period, the

last rotation period, and whenever the printer’s top cover is opened and closed.

Figure 13. Main-motor control

The main motor is a dc brushless motor with hall elements, and is unified with the motor drive

circuit.

The CPU sets the main-motor drive signal (/MON) to “L” and rotates the main motor. When

printing at 1200 dpi, the CPU sets the main-motor rotation switching signal (/HALF) to “L” and

decreases the rotation speed of the main motor to half.

The dc controller board regulates the scanner motor. It rotates the scanner mirror during the

initial rotation period and the print period.

The fan motor is a two-phase, four-pole dc brushless motor that contains a hall element and

forms a unit along with the motor drive circuit.

When the printer turns on, the CPU on the dc controller PCA initially causes the fan motor to run

for one-half second.

The CPU controls the half-speed/full-speed rotations according to the target fuser roller

temperature when the CPU receives the /PRNT signal from the formatter. When the fuser warms

up sufficiently, it sets the fan drive voltage (FANON) to the voltage level that runs the fan motor at

full speed. If the printing ends, the fan motor runs at full speed for 30 seconds after the main

motor stops, and then the fan motor runs at half speed.

www.GovTechMedia.com

1 2 ... 74 75 76 77 78 79 80 81 82 83 84 ... 313 314

Pas de commentaire

HP LASERJET 5100LE Manuel d'utilisateur Page 79