Canon NP6251 Service Manual page 551

CHAPTER 11 TROUBLESHOOTING
3. Adjusting the Position of the Blanking Exposure Lamp
1) Place the Test Sheet on the copyboard.
2) Select A4 copy paper.
3) Make a copy, and check that the left/right registration is correct.
4) Make a copy in Direct.
5) Check the image, and measure the non-image width shown in Figure 11-221.
Standard
6) If the non-image width is not as specified, turn the adjusting screw to adjust the
position of the blanking exposure lamp assembly.
11-20
COPYRIGHT © 1997 CANON INC.
Paper Left/right non-image width (W1)
All sizes
(w/ standard frame erasing)
Table 11-202
A
A
Figure 11-221
Figure 11-222
CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON)
2.75 ± 2.5mm
(rear)
10 mm
10 mm
Adjusting screw