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Zhone 900 Maintenance Manual page 7

Power cable

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Figure 5: Mate and Lock Connector
This cable will take some force to overcome this connection. Room to maneuver inside of
the IMACS housing will allow for maneuverability. Care should be taken to not break the
lip on the backplane side of the connector, as a ten-tear old connection might become
brittle. Upward force on the cable, or a small wedge (such as a screwdriver tip) inserted
between the two flat surfaces can result in a successful de-coupling of the connector.
Cable Cleaning
Both ends of the cable can be cleaned in turn by using a spray degreaser into the receptor
holes of the cable. The degreaser should mention that it is suitable for use on PC boards.
Once both ends of the cable have been cleaned, then a non-conductive oxidation
preventative can be applied directly into the receptor holes of the cable connector.
Post Cleaning
Similar to the cable ends, the posts on the IMACS backplanes should also be cleaned
with the degreaser used above. A non-conductive oxidation preventative should be
rubbed onto the metal posts to ensure complete coverage and coating.
Cable Replacement
Once the cable and posts have been thoroughly cleaned and coated, the cable can then be
replaced.
When re-installing the cable, ensure that the brown wire is oriented towards the top of the
connector, matching the original.
Be careful to thread the cable through the slot to the right of user card U8, so that the
cable can then be re-fastened to the side wall of the IMACS-900 shelf. The action of
installing the cable onto the posts also provides some abrasive cleansing, so placing the
cable onto the posts and then removing it a few times helps to ensure a more thorough
contact area.
Take care to line up the cable with the posts to ensure all pins are mating with the cable
connector. The cable ends have a lip on them that will mate and lock with the connector
on the board side. Use some force when installing the cable connector to make sure that it
locks into place on the board. If the cable does not lock, make sure it is oriented properly.
Zhone Technologies, Inc. @Zhone Way, 7001 Oakport St., Oakland, CA 94621 (510) 777-7000 Fax: (510) 777-7001

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