Canon PC981 Service Manual - Page 271
Image Leading Edge Margin registration activation timing, Caution
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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. 2.5 ± 1.5mm Figure 11-203 1) Turn VR104 on the DC controller PCB so that the margin is as indicated. VR104 J131 J101 J102 J101 J130 J114 J102 VR104VR105VR106 VR107 VR103VR102 J107 J103 J104 J105 J109 J106 Figure 11-204 Turing VR104 and Image Leading Edge Margin Direction of VR104 Clockwise Counterclockwise Image leading edge margin Increases Decreases Table 11-202 11-6 COPYRIGHT © 1999 CANON INC. CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)