HP color laserjet 4500 Manuale Utente

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Troubleshooting paper path problems
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Troubleshooting paper path problems
Paper jams 
Paper jams are posted if paper fails to arrive at or clear the paper path 
sensors in the allowed time. Dedicated paper sensors (PS2, PS7, 
PS3101, PS3103, and PS3104) detect whether paper is present in the 
sensor and if the paper is fed normally (see the figure below). When the 
control board detects a paper jam, it immediately stops the printing 
process and displays the appropriate paper jam message for the sensor 
that detects the paper jam.
Paper jam sensors 
(shown with the optional 500-sheet paper feeder 
and duplex unit installed)    
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