COPYRIGHT © 1999 CANON INC. CANON 660/2100 REV.0 FEB. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)5. Cassette Size Detection PCBFigure 10-511CHAPTER 10 TROUBLESHOOTING10-82J1601 51 SW1604 SW1603 SW1602 SW1601NameCassette detecting switch(p. 5-6)SW No.SW1601SW1602SW1603SW1604Download free service manual at http://printer1.blogspot.com