HP 4600 Service Manual - Page 430

■ Black, Magenta, Yellow, Cyan laser/scanners. Use the following four tests to rotate each scanner motor individually. ■ Fuser motor. Use this test to rotate the fuser motor and drive gears. ■ Alienation motor (also called the developing disengaging motor). This test moves the developing disengaging rod, clutches, and plates through their three positions: ■ Clean/Home: Middle position; all cartridges disengaged; used during cleaning cycle ■ Color: Top position; no cartridges disengaged; used during color printing ■ Black: Lowest position; C, M, and Y cartridges disengaged, black engaged; used during black-only printing ■ Tray1/tray 2 solenoids. This test activates and releases the tray 1 and tray 2 solenoids. The tray 1 solenoid is the lower solenoid. The tray 2 solenoid is the upper solenoid. You can remove the two securing screws and rotate the paper pickup unit to get a better view of the solenoids. Figure 7-24 Location of solenoids Table 7-52 Solenoids Name SL1 SL2 414 Chapter 7 Troubleshooting Function Cassette pickup solenoid (paper pickup drive assembly) Multi-purpose tray pickup solenoid (paper pickup drive assembly) ENWW