COPYRIGHT © 1999 CANON INC. CANON 660/2100 REV.0 FEB. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)B. Thermistors, Lamps, and HeatersFigure 10-502CHAPTER 10 TROUBLESHOOTING10-72SW1604SW1603SW1602SW1601SW671SW642LED1SW201SW202SW644SW1602SW1603THUTHLTPUSW673SW672SW1601HUHLTPLSW1SW641SW1604Download free service manual at http://printer1.blogspot.com