Canon NP6317 Service Manual page 175

b. Adjusting the Direct Copy Ratio (lens position)
1) Make a Direct copy.
2) Check the copy ratio. If the copy ratio is not appropriate, perform the following steps:
3) Enter service mode C10 (lens home position adjustment).
4) Try increasing or decreasing the value using the +/- keys. The (-) key moves the lens position
for enlargement (0.113%).
5) Exit from the service mode; and then turn the main switch to OFF/ON.
6) Make a Direct copy.
7) Check the copy ratio. If the copy ratio is appropriate, go to c. "Adjusting Focus (No. 4 and 5
mirror position)."
If the copy ratio is not appropriate, repeat step 4) and later.
c. Adjusting the Focus (No. 4 and 5 mirror position)
1) Make a Direct copy.
2) Check the copy ratio. If the copy ratio is not appropriate, perform the following steps:
3) Enter service mode C11 (mirror home position sensor adjustment).
4) Try increasing or decreasing the value using the +/- keys. The (-) key moves the mirror position
to the right by 0.05 mm (i.e., increases the optical path length by 0.1 mm).
5) Exit from the service mode; and then turn the main switch to OFF/ON.
6) Make a direct copy.
7) Check the copy ratio. If the copy ratio is appropriate, go to d. "Adjusting the Lens and Mirror
Position (50%)."
If the copy ratio is not appropriate, repeat step 4) and later.
d. Adjusting the Lens and Mirror Position (50%)
1) Make a 50% copy.
2) Check the copy ratio. If the copy ratio is not appropriate, perform the following steps:
3) Enter service mode C7 (copy ratio adjustment (50%)).
4) Try increasing or decreasing the value using the +/- keys. The (-) key moves the mirror and lens
position for enlargement (0.037%).
5) Exit from the service mode; and then turn the main switch to OFF/ON.
6) Make a 50% copy.
7) Check the copy ratio. If the copy ratio is appropriate, go to e. "Adjusting the Lens and Mirror
Position (200%)."
If the copy ratio is not appropriate, repeat step 4) and later.
e. Adjusting the Lens and Mirror Position (200%)
1) Make a 200% copy.
2) Check the copy ratio. If the copy ratio is not appropriate, perform the following steps:
3) Enter service mode C8 (lens ratio adjustment (200%)).
4) Try increasing or decreasing the value using the +/- keys. The (-) key moves the mirror and lens
position for enlargement (0.15%).
5) Exit from the service mode, and then turn the main switch to OFF/ON.
6) Make a 200% copy.
7) Check the copy ratio; if the copy ratio is appropriate, finish the adjustment. If the copy ratio is
not appropriate, repeat step 4) and later.
COPYRIGHT © 1999 CANON INC. CANON NP6317 REV.0 APR. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
CHAPTER 10 TROUBLESHOOTING
10-11