Canon PC980 Service Manual - Page 275

CHAPTER 11 TROUBLESHOOTING d. Checking the Force of the Cassette Spring If the force of the spring used to hold up the holding plate of the cassette is not correct, pickup faults or the like can occur. If a fault is suspected, check the force of the spring using a spring gauge (CK-0054), and replace the spring if it is not as indicated: Standard: 970 ±150 g Making Measurements Push the spring gauge against the middle of the spring as shown, and check to make sure that the reading of the spring gauge is 970 ±150 g when the holding plate is 18 mm away from the bottom of the cassette. Spring gauge (CK-0054) Holding plate 18mm Cassette spring Cassette Figure 11-211 11-10 COPYRIGHT © 1999 CANON INC. CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)