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Cisco GS7000 Maintenance Manual

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Maintenance
This section describes maintenance procedures for the 1.2 GHz GS7000 Remote PHY Device (RPD) 2X2
Segmentable Node.
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Opening and Closing the Housing
Installation or maintenance of the node requires opening the housing to access the internal modules.
Proper housing closure is important to maintaining the node in good working condition. Proper closure ensures
a good seal against the environment, protecting the internal modules.
Opening the Housing
Open the housing as follows.
1. Remove the bolts securing the lid to the base.
2. Carefully open the lid to allow access to the inside of the housing.
3. Inspect gaskets on the cover flange and on the test port plugs.
4. Replace any gaskets showing signs of wear (cracked, twisted, pinched, or dry) with new, silicon-lubricated
gaskets.
Closing the Housing
Close the housing as follows.
1. Ensure any worn gaskets are replaced, and the gaskets are clean and in the correct position.
2. Carefully close the lid.
Opening and Closing the Housing, on page 1
Preventative Maintenance, on page 2
Removing and Replacing Modules, on page 5
Care and Cleaning of Optical Connectors, on page 10
Maintenance
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Summary of Contents for Cisco GS7000

  • Page 1 Maintenance This section describes maintenance procedures for the 1.2 GHz GS7000 Remote PHY Device (RPD) 2X2 Segmentable Node. • Opening and Closing the Housing, on page 1 • Preventative Maintenance, on page 2 • Removing and Replacing Modules, on page 5 •...

  • Page 2: Preventative Maintenance

    Maintenance Preventative Maintenance Caution Use caution when closing housing. Improper closing may result in the unit not being sealed from the environment. 3. For strand-mounted housings, pull the lid away from the base and remove the slack from the hinge before rotating the lid up toward the base.

  • Page 3: Visual Inspection

    Maintenance Visual Inspection Procedure Interval Wiring/Cable Assemblies Annually Cleaning: External Surfaces Annually External Controls/Connectors Annually Internal Connectors/Circuit Cards Annually Visual Inspection Visually inspect the following items. What to Inspect How to Inspect Exterior surfaces Inspect for: • dust, dirt, lubricants, or other foreign matter worn spots or deep scratches on surfaces •...

  • Page 4: Consumable Materials

    Maintenance Consumable Materials Consumable Materials Use the materials listed below (or equivalent) when cleaning the equipment. Item Specification Isopropyl alcohol TT-I-735 Cheesecloth CC-C-440 Spray-type contact cleaner (none) Procedure Clean the equipment as described below. 1. Use a small paintbrush to brush dust from connectors. 2.

  • Page 5: Removing And Replacing Modules

    Maintenance Removing and Replacing Modules Removing and Replacing Modules This procedure describes how to remove and replace the internal modules of the node. All field-replaceable modules can be removed and replaced without removing power from the node. Field-replaceable modules include: •...
  • Page 6 Maintenance Accessing the Receiver/Transmitter Module Fiber Spool and Connector Note Pull up on the built-in handle on RPD, receiver module, transmitter module, status monitor/local control module, or power supply module. 5. Position the new module in the same location and carefully slide the module into its slot until connected to the optical interface board.
  • Page 7 Maintenance Accessing the Receiver/Transmitter Module Fiber Spool and Connector 2. Pull the fiber connector straight out from the side of the module cover to remove it. 3. Disassemble the fiber connector and pigtail for cleaning if necessary. 4. Reattach the fiber connector to the module cover and close the cover. Maintenance...

  • Page 8: Rf Amplifier Assembly Replacement Procedure

    Maintenance Forward/Reverse Configuration Module, Equalizer, and Node Signal Director Replacement Procedure Forward/Reverse Configuration Module, Equalizer, and Node Signal Director Replacement Procedure The forward and reverse configuration modules, equalizers, and node signal directors plug into the RF amplifier assembly through cut-outs in its cover. To remove these modules, pull up carefully on their integrated handles until they separate from the RF amplifier assembly.
  • Page 9 Maintenance RF Amplifier Assembly Replacement Procedure Note The screw locations are identified by number, 1 through 7. Insert a flat-blade screwdriver into the small holes in the metal handles on each side of the RF amplifier assembly and pry up carefully to disconnect the RF amplifier assembly’s rear panel connectors. Important Be careful not to damage the housing with the screwdriver.

  • Page 10: Care And Cleaning Of Optical Connectors

    Maintenance Care and Cleaning of Optical Connectors Grasp the two metal handles on the RF amplifier assembly and carefully lift the RF assembly out of the housing. To replace the RF amplifier assembly in the housing, carefully align the assembly in the housing, lower it into place and push down to reconnect the rear panel connectors.

  • Page 11: Recommended Equipment

    Maintenance Recommended Equipment Cleaning fiber-optic connectors can help prevent interconnect problems and aid system performance. When optical connectors are disconnected or reconnected, the fiber surface can become dirty or scratched, reducing system performance. Inspect connectors prior to mating, clean as needed, and then remove all residues. Inspect connectors after cleaning to confirm that they are clean and undamaged.

  • Page 12: Connectors And Bulkheads

    Maintenance Connectors and Bulkheads • Do not look into an unmated fiber or at any mirror-like surface that could reflect light that is emitted from an unterminated fiber. • Do not view an activated fiber with optical instruments such as eye loupes, magnifiers, or microscopes. •...

  • Page 13: Cleaning Bulkheads

    Maintenance Cleaning Bulkheads 3. If a second inspection indicates that further cleaning is needed: 1. Use 99% isopropyl alcohol and a lint-free wipe to clean the connector. 2. Use the appropriate ferrule cleaner again to remove any film left over from the alcohol. 3.

  • Page 14: Verifying Equipment Operation

    Maintenance Verifying Equipment Operation 5. It is also recommended that all connectors be visually inspected after cleaning to verify the connector is clean and undamaged. Verifying Equipment Operation Perform circuit turn-up. If the equipment does not come up, i.e., fails verification or indicates a reflection problem, clean the connectors and bulkheads again.

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