Canon PC920 Service Manual page 305

CHAPTER 11 TROUBLESHOOTING
4) Press the push switch (PSW) on the ADF controller PCB.
• The copy paper on the copyboard will be discharged, and the optimum value will be stored.
11-40
PSW
ON
1
Figure 11-262
COPYRIGHT © 1999 CANON INC.
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CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)