HP 4600 Service Manual - Page 177
Pickup/feed unit,
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Figure 5-34 Pickup/feed system Pickup/feed unit At the bottom of the paper path, the pickup unit picks individual pieces of media from the trays. Then the ETB carries the media to the top of the paper path. The following sequence of events occurs: 1 The formatter sends a print command to the DC controller, which rotates the pickup motor, the drum motors, the ETB motor, and the fuser motor. 2 The cassette feed roller and registration roller rotate as the pickup motor starts to rotate. 3 Media is picked from the cassette or multipurpose tray. A separation claw in the cassette prevents picking multiple sheets of media. A separation pad in the multipurpose tray prevents multiple sheets from feeding. 4 The registration shutter corrects any skew in the media, and the media is fed at a specified speed, according to the size and type of the media. 5 As the ETB carries the media past each print cartridge, toner is transferred onto the media. ENWW Pickup/feed system 161
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