Canon PC981 Service Manual - Page 51
I. Operations
View all Canon PC981 manuals
Add to My Manuals
Save this manual to your list of manuals |
Page 51 highlights
CHAPTER 3 EXPOSURE SYSTEM I. OPERATIONS A. Outline Table 3-101 shows the major functions of the exposure system. Item Lamp Scanning Scanner position detection Ratio variation Lens drive control Scanner drive control Protective function Halogen Description By moving the No. 1 mirror mount By a sensor (scanner home position sensor; PS1) Main scanning direction:by varying the optical length Sub scanning direction:by varying the speed of the No. 1 mirror mount Scanner/lens drive motor (M2) Fixed focal point lens unit Mobile No. 4/5 mirror unit Scanner/lens drive motor (M2) Scanner thermistor (TH2) By a fuse (blows in response to overheating of the scanning lamp to cut power to the lamp) • Thermal fuse (FU1; blows at 128°C) Table 3-101 Copyboard glass Enlarge Reduce Moves for enlargement/ reduction Fixed focal point lens Photosensitive drum No. 4/5 mirror unit COPYRIGHT © 1999 CANON INC. Figure 3-101 CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON) 3-1