Canon PC940 Service Manual - Page 120

CHAPTER 4 IMAGE FORMATION SYSTEM C. Blank Exposure 1. Removing the Blanking Exposure Unit 1) Set the machine to the maximum ratio (141%) as follows: • Turn on the power, and select a default ratio of 141%. • Press the Copy Start key. • When the lens has moved to the farthest left, turn off the power. • Disconnect the power plug. 2) Remove the front lower cover. (See Chapter 7.III.A.2."Removing the Front Lower Cover.") 3) Remove the cartridge. 4) Remove the DC controller PCB. (See Chapter 7.III.E.1."Removing the DC controller PCB.") 5) Remove the composite power supply PCB. (See Chapter 7.III.E.2."Removing the Composite Power Supply PCB.") 6) Remove the two screws [1]. [1] Figure 4-203 4-26 COPYRIGHT © 1999 CANON INC. CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)