Nortel Passport 15000, Установка и обслуживание оборудования, Страница: 441 / 874

Chapter 17 Hardware procedures 441
Passport 15000, 20000 Hardware Installation, Maintenance, and Upgrade 5.2S2
• each rolling alignment bushing at the outside corners evenly enters
the 4 alignment grooves shown in the inset of the figure “Locations of
notches for fabric hinge bushings on Passport 20000 shelf assembly”
(page 445)
• the 4 guide pin keyways at the rear corners of the fabric align with the
4 guide pins on the backplane (inside the shelf); see the figure “A
fabric of a Passport 20000, rear view” (page 443)
9 Hold the fabric in place with one hand and close the fabric lever. Moving
the lever starts seating the fabric and requires a firm, steady motion to the
left against variable resistance. When the lever is almost closed, the
tension on it will lessen noticeably.
Seating the NTPN02 requires slightly more force than an NTHR16 of a
Passport 20000. If the NTPN02 hinge bushings squeak during seating,
this is normal.
If inserting the fabric is stopped by a blockage, typically you can feel it but
not see it. When you feel blockage, stop the insertion. Move the fabric
away from the shelf to check for foreign objects. If you cannot find the
cause of the blockage, return to step 5 to re-align the fabric hinge pins. If
the blockage persists, contact your Nortel Networks technical support
representative.
10 When the alignment bushings reach the end of the groove, the fabric lever
is almost fully closed. Fully seat the fabric and depress the reset button
by closing the fabric lever flush with the cover of the fabric.
11 Align and tighten the captive screw on the lever to snug plus a 1/5 turn
when
• all 4 alignment bushings are at the end of the alignment grooves
• the 4 corners of the fabric cover are evenly aligned with the
surrounding edges of the shelf assembly
• the fabric lever is closed flush
Avoid stripping the screw.