Canon PC921 - Page 50

CHAPTER 2 STANDARDS AND ADJUSTMENTS
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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.
Figure 2-62
0
F
E
D
C
B
A
9
8
7
6
5
4
3
2
1
ON
12
PSW