COPYRIGHT © 1999 CANON INC. CANON 660/2100 REV.0 FEB. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)V. DETECTING JAMSA. Detecting Jams in the Printer UnitThe printer unit is equipped with the following paper sensors to check the pres-ence/absence of paper and to find out whether paper is moving normally inside it:• Registration paper sensor (PS1)• Pick-up assembly paper sensor (PS17)• Separation sensor (PS5)• Face-down tray delivery sensor (PS11)• Transparency sensor 1/2 (PS1801/PS1802)• Fixing delivery sensor (PS1903)A jam is identified in relation to the presence/absence of paper at a specific sensor atsuch times as programmed in the microprocessor (CPU) in advance.When the microprocessor identifies a jam, it stops the ongoing printing operation andcommunicates the fact to the printer board*1.*1 Reader controller PCB (when making prints with the reader unit installed).Figure 5-501CHAPTER 5 PICK-UP/FEEDING SYSTEM5-29Face-downdeliveryrollerFace-down trayIntermediatetransfer drumUpperfixing rollerLowerfixing rollerMultifeederpick-up rollerPick-up rollerRegistration rollerCassette 1Face-up trayFace-updelivery roller Feeding roller 2Pick-up rollerCassette 2Secondarytransfer beltPS11Face-down traydelivery sensorPS19Fixing deliverysensorPS1Registration papersensorPS17Pick-upassemblypaper sensorPS5SeparationsensorTransparency sensorPS1802Transparency sensorPS1801Download free service manual at http://printer1.blogspot.com
