CANON ADDF-A1
Service Manual

CHAPTER 5 TROUBLESHOOTING

Points to Note When Taking Measurements 1. Be sure that the three separation belts are in contact with the test strip. 2. Be sure that the test strip is pulled straight along the separation belt (Figure 5-131). 3. Be sure that measurements are taken when the rear end of the test strip and the rear end of the original tray are flush (Figure 5-136).
Upper cover Test strip Spring

Glued in place

[1] [2]

Glued in place
(rear)

Figure 5-137
Test strip 64 g/m2 80 g/m2 Feeding power (g) 520±20 570±20

(front)

Match the end of the test strip and the end of the original tray.

Table 5-109 Feeding Power
Spring gauge:capable of measuring about 600g (Tool No.CK-0058)

Figure 5-136 Measuring the Feeding Power (front) 7) Open the upper cover of the DADF to end measurement. 8) Loosen the lock nut 1 used to keep the front, and turn the adjusting screw 2 until the feeding power is as indicated. Then, tighten the lock nut 1.

Note: As a guide, try to limit the difference in feeding power between front and rear.
Direction of rotation Clockwise Counterclockwise Feeding power Decreases Increases

Table 5-110 Adjusting Screw and Feeding Power 9) Likewise, adjust the feeding power at the rear. 10) Measure the feeding power at front and rear once again. If the measurements are as indicated, firmly tighten the lock nut and glue it in place. Otherwise, make adjustments once again.

5-14

COPYRIGHT © 1998 CANON INC.

CANON DADF-A1 REV.0 DEC. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)