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Northern Telecom Meridian SL-1 Reference Manual

2-mbs/ remote peripheral equipment cabinet maintenance/equipment replacement
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Download this manual See also: Installation Manual
SL-1
2-Mbs/ Remote Peripheral Equipment
QCA146 cabinet maintenance/equipment replacement
Publication number: 553-2741-500
Product release: Group F
Document status: Standard
Date: 90 11 02
© 1987 Northern Telecom
All rights reserved
NT, Meridian1, Meridian and SL-1 are trademarks of Northern Telecom.
Title to and ownership of SL-1 software shall at all times remain with Northern Telecom. SL-1
software shall not be sold outright and the use thereof by the customer shall be subject to the
parties entering into agreement as specified by Northern Telecom.
Information contained in this document is subject to change. Northern Telecom reserves the
right, without notice, to make changes in equipment or program components as progress in
engineering, manufacturing, or technology may warrant.
2-Mb/s Remote Peripheral Equipment
Appendix 1 to 553-2741-500

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  • Page 1 SL-1 2-Mbs/ Remote Peripheral Equipment QCA146 cabinet maintenance/equipment replacement Publication number: 553-2741-500 Product release: Group F Document status: Standard Date: 90 11 02 © 1987 Northern Telecom All rights reserved NT, Meridian1, Meridian and SL-1 are trademarks of Northern Telecom. Title to and ownership of SL-1 software shall at all times remain with Northern Telecom.
  • Page 2 Reason for revision 90 11 02 Changes have been made to add references to publication 553-2931-500 for Generic X11 Supplementary Features (Phase 6) Remote Peripheral Equipment and include miscellaneous updates. 2-Mb/s Remote Peripheral Equipment Appendix 1 to 553-2741-500...

  • Page 3: Table Of Contents

    Contents General Fault detection and locating Overlay programs Alarm indications Fault locating Fault-clearing procedures Equipment Replacement 2-Mb/s Remote Peripheral Equipment i of i page Appendix 1 to 553-2741-500...

  • Page 4: General

    1-1 of 1 page General This Appendix describes maintenance and equipment replacement procedures for the QCA146 Remote Peripheral Equipment (RPE) cabinet and related equipment. Fault clearing for the RPE housed in the QCA146 cabinet is described in NTPs 553-2741-500 for Generic X08 and 553-2931-500 for Generic X11 with Supplementary Features.

  • Page 5: Fault Detection And Locating

    Fault detection and locating Overlay programs Overlay programs are used to detect most faults in the QCA146 cabinet. These programs are described in 553-2741-500 (X08) or 553-2931-500 (X11 Supplementary Features). Alarm indications RPE related alarms are described in 553-2741-500 (X08) or 553-2931-500 (X11 Supplementary Features).
  • Page 6 2-2 Fault detection and locating Table 2 -A Alarm indications TYPE OF FAULT +12V +10V +15V -15V -12V -10V -6 V -48V -52V AL (-47V) -52V TRIP (-42V) 86V RMS DCON RECTIFIER PE PWR FROM SECOND AND THIRD TIER PE 2-5 MANUAL LINE TRANSFER -150V...
  • Page 7 Table 2 -B Fault indication and possible causes Fa ult in di cat io n CE/PE LED extinguished RECT/BATT LED extinguished 2-Mb/s Remote Peripheral Equipment Fault detection and locating 2-3 Po ssib le cause Check QUX19 unit for tripped breaker. Check for a blown fuse on the QUAA3 and QUX19 units.
  • Page 8 2-4 Fault detection and locating Check for a tripped breaker on the QBL24 battery unit (if provided). A tripped breaker on the QBL24 unit indicates defective batteries or a defective QBL24 unit. —co nt in ued — 2-Mb/s Remote Peripheral Equipment Appendix 1 to 553-2741-500...
  • Page 9 Table 2-B (continued) Fault indications and possible causes Fa ult in di cat io n PE2-5 LED extinguished FN LED extinguished LED extinguished on QPC705 power converter LED extinguished on QPC706 power converter 2-Mb/s Remote Peripheral Equipment Fault detection and locating 2-5 Po ssib le cause Check for tripped PE2, PE3, PE4 or PE5 breaker on QUX20 unit.
  • Page 10 2-6 Fault detection and locating Table 2-B (continued) Fault indications and possible causes Corresponding breaker on QUX20 unit must be set to OFF before removing or inserting a QPC706 converter. Fa ult in di cat io n DC ON LED extinguished LED lit on Power Fail Transfer Unit...
  • Page 11 Chart 2-1 CE/PE1 breaker on QUX19 unit trips St ep Ac ti on Reset breaker. Unseat the QPC659 buffer pack in the PE shelf in the first tier (base) of the cabinet. Reset breaker. Set breaker to OFF. Unseat all remaining circuit packs from PE shelf.
  • Page 12 2-8 Fault detection and locating Chart 2-2 AC BRKR or AC power breaker on -48 rectifier trips St ep 2-Mb/s Remote Peripheral Equipment Ac ti on Reset breaker. Disconnect red and black wires from TB3 at rear of rectifier. Reset breaker. Set breaker to OFF and reconnect wires.
  • Page 13 Chart 2-3 PE2, PE3, PE4 or PE5 breaker trips St ep Ac ti on Reset breaker. Check for extinguished LED on QPC706 pack associated with tripped breaker and replace pack. Reset breaker. Unseat all circuit packs on the shelf except the QPC706 pack.
  • Page 14 2-10 Fault detection and locating Chart 2-4 FN fuse operates or FN LED is extinguished QUX19 should be connected to J7 on the QUAA3 unit. When cooling units are equipped, J7 is connected to the cabinet wiring leading to the cooling units.

  • Page 15: Equipment Replacement

    3-1 of 26 pages Equipment replacement The following charts describe equipment replacement procedures used when replacing defective apparatus in QCA146 RPE cabinets; • Battery Replacement - Chart 3-1 • Expansion QBL24 Battery Unit Replacement - Chart 3-2 • Main QBL24 Battery Unit Replacement - Chart 3-3 •...
  • Page 16 Equipment replacement Chart 3-1 Battery replacement Service in the cabinet is interrupted when replacing the batteries. St ep Pr oced ur e externally short-circuited. Caution must be used when working 2-Mb/s Remote Peripheral Equipment Set the AC BRKR or the AC POWER breaker (whichever is equipped) on the front of the -48 V rectifier and the CAB INP breaker on the front of the QUX19 unit to OFF.
  • Page 17 Chart 3-1 (continued) Battery replacement St ep Pr oced ur e With three black jumper wires, connect the four battery packs in series (Fig. 3-1). Connect the large lug on the black wire to terminal of the first battery pack. Connect the small lug on the wire to the terminal on the second battery pack.
  • Page 18 Equipment replacement Chart 3-2 Expansion QBL24 battery unit replacement St ep Pr oced ur e externally short-circuited. Caution must be used when working 2-Mb/s Remote Peripheral Equipment Service in the cabinet is interrupted when replacing the expansion QBL24 battery. Set the AC BRKR or the AC POWER breaker (whichever is equipped) on the front of the -48 V rectifier to OFF in the cabinet connected to the QBL24 battery unit being replaced.
  • Page 19 Chart 3-2 (continued) Expansion QBL24 battery unit replacement St ep Pr oced ur e Remove batteries from old unit and install in new QBL24 unit as described in Chart 1 (or install new batteries). Install cover on expansion QBL24 unit. Install flexible conduit and wiring from expansion QBL24 unit to main QBL24 unit (Fig.
  • Page 20 Equipment replacement Chart 3-3 Main QBL24 battery unit replacement St ep Pr oced ur e 2-Mb/s Remote Peripheral Equipment Set the AC BRKR or the AC POWER breaker (whichever is equipped) on the front of the the -48 V rectifier to OFF in the cabinet connected to the QBL24 battery unit being replaced.
  • Page 21 Chart 3-4 QUAA3 power unit replacement St ep Pr oced ur e Set the AC BRKR or the AC POWER breaker (whichever is equipped) on the front of V the -48 rectifier to OFF. Set the DC BRKR breaker on the QBL24 battery units (if equipped) serving the cabinet to OFF.
  • Page 22 Equipment replacement Chart 3-4 (continued) QUAA3 power unit replacement St ep Pr oced ur e 2-Mb/s Remote Peripheral Equipment —co nt in ued — Ensure that the 25HZ/20HZ and the LN XFR switches on the front of the QUAA3 unit are correctly set (usually set the same as on the removed QUAA3 unit).
  • Page 23 Chart 3-5 QUX19 power unit replacement Service is interrupted when replacing the QUX19 power unit. St ep Pr oced ur e Set the AC BRKR or the AC POWER breaker (whichever is equipped) on the front of the -48 V rectifier to OFF. Set the DC BRKR breaker on the QBL24 battery units (if equipped) serving the cabinet to OFF.
  • Page 24 3-10 Equipment replacement Chart 3-5 (continued) QUX19 power unit replacement St ep Pr oced ur e 2-Mb/s Remote Peripheral Equipment Install cabinet top assembly and secure with mounting screws (Fig. 3-4). Reconnect power wiring to TB1 and P10 wiring to TB2 at rear of QUX19 unit.
  • Page 25 Chart 3-6 QUX20 power unit replacement Service in the cabinet is interrupted when replacing the QUX20 St ep Pr oced ur e Set the breakers on the faceplate of the QUX20 unit to OFF. Set the CAB INP breaker on the QUX19 unit to OFF. From the rear of the cabinet, disconnect the lead equipped with a spade connector from the QUX20 unit to TB3 at rear of the QUX19 unit.
  • Page 26 3-12 Equipment replacement Chart 3-7 Power distribution cable replacement St ep Pr oced ur e 2-Mb/s Remote Peripheral Equipment Service in the cabinet is interrupted when replacing a power distribution cable. Set the CAB INP breaker on the QUX19 unit to OFF. Perform this step only if the power cable serving the first tier is being replaced.
  • Page 27 Chart 3-7 (continued) Power distribution cable replacement St ep Pr oced ur e Perform this step only if the power distribution cable for the third tier is being replaced. a) Disconnect connector P4 and P7 from the rear of the QUAA3 unit.
  • Page 28 3-14 Equipment replacement Chart 3-8 QUA6 power fail transfer unit replacement St ep Pr oced ur e 2-Mb/s Remote Peripheral Equipment Place temporary jumpers at cross-connect terminal to maintain service on telephones involved with the QUA6 unit. Remove and tag cable from connector J1 on the faceplate of the QUA6 unit.
  • Page 29 Chart 3-9 QPC705 converter replacement Service in the cabinet is interrupted when performing this step. St ep Pr oced ur e Set the CAB INP breaker on the QUX19 power distribution unit to OFF. Remove the screws securing the QPC705 converter to the cabinet. Slide the QPC705 converter out of its position and disconnect the QCAD278 power cable from the connector at the rear of the converter.
  • Page 30 3-16 Equipment replacement Chart 3-10 QPC706 power converter circuit pack replacement St ep Pr oced ur e 2-Mb/s Remote Peripheral Equipment Perform this step only if the QCAD278 power cable is being replaced. a) Connect connector P2 of the QCAD278 cable to connector P2 at the rear of the QUAA3 unit.
  • Page 31 3-18 Equipment replacement Chart 3-11 QUD24 cooling unit replacement Note: QUD24 Cooling units are located in the cabinet top panel assembly. Connections given in this chart are typical and may vary from one installation to another. Cooling units are connected in series. St ep Pr oced ur e 2-Mb/s Remote Peripheral Equipment Remove the six screws securing the cabinet top panel assembly and...
  • Page 32 Chart 3-12 QRF12 rectifier replacement Service in the cabinet is interrupted when replacing the rectifier unless battery backup is provided. St ep Pr oced ur e Set AC BRKR breaker on the front of the rectifier to OFF. Disconnect rectifier commercial power line cord from its receptacle. Tag and disconnect the commercial power line cord, sense leads, DCON lead and battery leads from the rear of the rectifier (Fig.
  • Page 33 3-20 Equipment replacement Chart 3-13 Peripheral equipment shelf backplane replacement St ep Pr oced ur e Note: If the loop is extended to a second PE shelf, that shelf must also be disabled. 2-Mb/s Remote Peripheral Equipment Log in to the system and load overlay program 32 as described in 553-2301-511.
  • Page 34 With overlay program 32 (see 553-2301-511) enable the previously disabled shelves by entering command ENLS l s, where l is the loop and s is the shelf number. Enter **** to abort overlay program 32. Chart 3-13 (continued) Peripheral equipment shelf backplane replacement St ep Pr oced ur e To test replacement PE shelf, load overlay program 30 (NWS).
  • Page 35 3-22 Equipment replacement Figure 3-1 Battery cell connections Front Of QBL24 Unit Black Wire To QBL24 Unit Red Wire To QBL24 Unit Battery Packs Flexible Conduit For Power And Control Wiring (Ill553-1136) 2-Mb/s Remote Peripheral Equipment Battery Packs Top View Of QBL24 Battery Unit Appendix 1 to 553-2741-500 Black Interconnecting...

  • Page 36: Expansion Battery Unit Connections

    Figure 3-2 Expansion battery unit connections Black Wire Green Wire Inside View Of Front Panel QCAD301 Cable From Expansion QBL24 Unit BRKR Connects To Cabinet (Ill553-1138) Shield Red Wire Main QBL24 Battery Unit Remove Plug To Insert 90° Elbow And Cable QBL24 BATT UN 54V/30A...
  • Page 37 3-24 Equipment replacement Figure 3-3 Connections at rear of cabinet Wires 1 And 2 From Battery Unit Long Red and Black Straps For Batteryless Operation Only (Store Straps With Screws Provided When Not in Use) Black White Place Wiring In Channel Note: These terminals are located on the QUX21 unit in PE expansion cabinets.

  • Page 38: Cabinet Top Assembly

    Figure 3-4 Cabinet top assembly (Ill553-1141) Screws Thermostat Cooling Units Optional Additional Shelf Optional Additional Shelf Base Cabinet Front View Of Cabinet 2-Mb/s Remote Peripheral Equipment Equipment replacement 3-25 Louvered Top Assembly Two Additional Louvers To Accommodate Cooling Units Top Panel Appendix 1 to 553-2741-500...
  • Page 39 3-26 Equipment replacement Figure 3-5 Shelf assignments X-LP__SH_ Shelf Position PE4 Breaker on QUX20 QUAA3 Power (Ill553-1293) 2-Mb/s Remote Peripheral Equipment PE SHLF Y-LP__SH_ X-LP__SH_ Unit X-6/ X-7/ X-8/ X-9/ X-LP__SH_ PE or RPE Shelf Shelf Position PE2 Breaker on QUX20 Unit X-LP__SH_ RPE Shelf...
  • Page 40 Figure 3-6 Cooling unit connections Cabinet Top Panel Note: Cooling units are wired in series. Connections to and between cooling units may not always be as shown. (Ill553-1142) CU1 Connector Mounting of Cabinet Screws Hole In Panel QUD24 Cooling Units Rear Connectors Front Connectors Mounting...
  • Page 41 SL-1 2-Mb/s Remote Peripheral Equipment QCA146 cabinet maintenance and equipment replacement © 1987 Northern Telecom All rights reserved. Information subject to change without notice. Group F Standard 90 11 02 Printed in Canada...

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