4–47COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)MECHANICAL SYSTEM15 1413 13 131011 128) Push the thermal switch t in the direction of thearrow, and remove it.Figure 4-7089) Remove the screw y, and remove the metalplate u.Figure 4-70910) Remove the screw i, and remove the ther-mistor o.Figure 4-7106 79 8511) Remove the E-ring !0 at the front, and removethe bush !1 and the bearing !2; then, pull out theupper roller.Figure 4-71112) Remove the three E-rings !3 at the rear, andpull out the gear !4 and the bush !5.Figure 4-7124. Points to Note after Replacing theUpper Fixing Unit• If you have replaced the upper fixing unit, youmust enter the temperature adjustment inservice mode No. 304. (See the ServiceHandbook.)Caution:Do not touch the surface of the heater.
