HP LaserJet 6p/mp Service Manual - Page 67
Paper jam detection, The Paper Out Sensor PS202, Paper Registration Sensor PS203
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Paper jam detection The Paper Out Sensor (PS202), Paper Registration Sensor (PS203), and the Paper Exit Sensor (PS201) detect when paper is moving through the printer. (See Figure 5-5 for roller and sensor locations.) If a paper jam is detected, the DC Controller immediately stops the printing process and causes a paper jam indication on the Control Panel. A paper jam can be detected under any of the following conditions: l Power-On Jams. Paper is present under either PS201 or PS203 at power-on. l Pickup Jams. Paper does not reach and clear photosensor PS203 within a specified period of time. The time period begins when the Paper Pickup Solenoid (SL1) is energized. l Delay Jams. Paper does not reach or clear a specific photosensor within a specified period of time. EN Paper feed system 65