Canon PC920 Service Manual page 271

CHAPTER 11 TROUBLESHOOTING
b. Image Leading Edge Margin (registration activation timing)
Make adjustments so that the leading edge margin is 2.5 ±1.5 mm when the Test Sheet is
copied.
Caution:
Be sure to check that the leading edge non-image width is as indicated before performing this
adjustment.
1) Turn VR104 on the DC controller PCB so that the margin is as indicated.
11-6
Figure 11-203
J130 J114
J107 J103
VR103VR102
Figure 11-204
Turing VR104 and Image Leading Edge Margin
Direction of VR104
Clockwise
Counterclockwise
Table 11-202
COPYRIGHT © 1999 CANON INC.
2.5 ± 1.5mm
VR104
J102
VR104 VR105 VR106
VR107
J106
J104
J105
J109
Image leading edge margin
Increases
Decreases
CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)