ADC Telecommunications DIS190AB Digivance 1900 MHz Indoor Coverage Solution User Manual 75132 CV

ADC Telecommunications Inc Digivance 1900 MHz Indoor Coverage Solution 75132 CV

Contents

Users Manual Section 3

ADCP-75-132 • Issue 2C • August 2006 Page 48 © 2006, ADC Telecommunications, Inc. 6 SYSTEM MAINTENANCE PROCEDURES This section explains the alarm reporting system, provides a method for isolating and troubleshooting faults, and provides procedures for replacing the modular transceivers and the DHU or DEU cooling fans. The Digivance ICS requires no regular maintenance to insure continuous and satisfactory operation. Maintenance, as it applies to the Digivance ICS, primarily involves diagnosing and correcting service problems as they occur. When an alarm is reported, it will be necessary to follow a systematic troubleshooting procedure to locate the problem. Once the source of the problem is isolated, the appropriate corrective action can be taken to restore service. The only unit components that can be replaced are the cooling fans that mount in the DHU and DEU and the modular optical transceivers. The failure of any other component within a unit will require replacement of that unit. 6.1 Tools and Materials The following tools and materials are required in order to complete the procedures in this section: • ESD wrist strap • IR filtering safety glasses • Optical loopback device (such as Stratos Lightwave LC5 series) and LC duplex adapter • Optical power meter • Magnification device for inspecting LC connectors • Laser light source • Multimeter • Cell phone • RJ-45 circuit access tool (such as the Harris 8-wire Banjo Adapter) • Medium and small size flat-bladed screwdrivers • TORX screwdriver (T10) 6.2 Fault Detection and Alarm Reporting Detection of a fault by the Digivance ICS will generate an external alarm response. LED indicators are provided on the front panel of the various units to indicate when a fault is detected. In addition to LED indicators, the DHU also provides normally open (NO) and normally closed (NC) dry alarm contacts for reporting minor and major alarms to an external alarm system. A minor alarm is defined as a high temperature condition. A major alarm is defined as any fault condition except high temperature. When the DHU alarm contacts are connected to an external alarm system, detection of a fault will generate an alarm at the Network Operations Center (NOC). However, various types of faults may not generate an alarm response. In this case, the first indication of a problem will probably be from cell phone users reporting a loss of service or poor service. Whenever a problem is reported, whether by a external alarm system or by a call from a user, refer to Subsection 6.3 to isolate and correct the fault.
ADCP-75-132 • Issue 2C • August 2006 Page 49 © 2006, ADC Telecommunications, Inc. 6.3 Fault Isolation and Troubleshooting Fault isolation and troubleshooting guidelines are provided in Tables 11, 12, 13, and 14. When an alarm is reported, determine the type of alarm generated (minor or major) and then check the LED indicators on the DHU and note any that are red, yellow, or off. If any of the Port 1–6 OK/NOK LED indicators on the DHU are red or yellow, also check the LED indicators on the connected DEU’s and/or DRU’s and note if any are red or yellow. Start the troubleshooting process at the DHU and then work toward the unit where the alarm originated. The troubleshooting tables are organized according to unit type. Locate the problem in the appropriate table, check out the suggested possible causes, and take corrective action as required. Figure 25 shows two basic ICS system configurations. The troubleshooting tables list possible causes for various problems. If the cause of a particular problem is specific to either of the two system configurations shown in Figure 25, the type of system configuration (1 or 2) will be referenced in the table. 17962-AFWDREVDRUFWDREVDRUFWDREVDIGITAL EXPANSION UNITDIGITAL HOST UNITDIGITAL HOST UNIT(2)(1) Figure 25. ICS System Basic Configurations Table 11. DHU Fault Isolation and Troubleshooting Guidelines Alarm Type LED LED COLOR Minor UNIT Yellow Problem : The DHU is overheating. POSSIBLE CAUSE CORRECTIVE ACTION/COMMENTS 1. Air intake or exhaust openings to DHU chassis blocked. 2. Ambient temperature > 50º C/122º F. 3. Faulty fan. 1. Remove cause of air-flow blockage. 2. Reduce ambient temperature. 3. Replace fan (see Subsection 6.5). Alarm Type LED LED COLOR Major UNIT Red Problem : The DHU detects an internal circuitry fault. POSSIBLE CAUSE CORRECTIVE ACTION/COMMENTS 1. Faulty DHU. 1. Replace DHU. (Continued)
ADCP-75-132 • Issue 2C • August 2006 Page 50 © 2006, ADC Telecommunications, Inc. Table 11. DHU Fault Isolation and Troubleshooting Guidelines (Continued) Alarm Type LED LED COLOR Major OVERDRIVE Red Problem: Forward path RF input level too high. POSSIBLE CAUSE CORRECTIVE ACTION/COMMENTS 1. Incorrect attenuation in forward path RF coaxial link. 1. Adjust attenuation at RIU or HPCP. Alarm Type LED LED COLOR Minor OK/NOK Yellow Problem: The DHU is receiving a minor alarm signal from the DEU. POSSIBLE CAUSE CORRECTIVE ACTION/COMMENTS 1. The connected DEU is overheating (2). 1. Check DEU UNIT indicator and then refer to the appropriate troubleshooting section for procedures. Alarm Type LED LED COLOR Major OK/NOK Blinking Red Problem: The DHU is not receiving an optical signal from the DRU or DEU. POSSIBLE CAUSE CORRECTIVE ACTION/COMMENTS 1. Forward and reverse path optical fibers reversed between DHU and DRU (1); or between DHU and DEU (2). 2. Faulty reverse path optical fiber between DHU and DRU (1). 3. Faulty optical receive port at DHU or faulty optical transmit port at DRU (1). 4. Faulty forward or reverse path optical fiber between DHU and DEU (2). 1. Check fiber connections for correct polarity and reverse connectors at either unit if mismatched. 2. Clean optical connector and then test optical fiber. Repair or replace if faulty (see Subsection 6.4.2). 3. Make sure transceiver is fully plugged in and then test optical port. Replace optical transceiver if port is faulty (see Subsection 6.4.1). 4. Clean optical connectors and then test optical fibers. Repair or replace if faulty (see Subsection 6.4.2). Alarm Type LED LED COLOR Major OK/NOK Red Problem: The DHU is receiving a major alarm signal from the DRU. POSSIBLE CAUSE CORRECTIVE ACTION/COMMENTS 1. Faulty forward path optical fiber between DHU and DRU (1). 2. Faulty optical transmit port at DHU or faulty optical receive port at DRU (1). 3. The DRU is faulty (1 and 2). 4. Faulty forward or reverse path optical fiber between the DEU and DRU (2). 1. Clean optical connector and then test optical fiber. Repair or replace if faulty (see Subsection 6.4.2). 2. Make sure transceiver is fully plugged in and then test optical port. Replace optical transceiver if port is faulty (see Subsection 6.4.1). 3. Check DEU UNIT indicator or DRU STATUS indicator and then refer to appropriate trouble- shooting section for procedures. 4. Check the status of the OK/NOK LED on the DEU and then Refer to Table 12.
ADCP-75-132 • Issue 2C • August 2006 Page 51 © 2006, ADC Telecommunications, Inc. Table 12. DEU Fault Isolation and Troubleshooting Guidelines Alarm Type LED LED COLOR Minor UNIT Yellow Problem : The DEU is overheating. POSSIBLE CAUSE CORRECTIVE ACTION/COMMENTS 1. Air intake or exhaust openings to DEU chassis blocked. 2. Ambient temperature > 50º C/122º F. 3. Faulty fan. 1. Remove cause of air-flow blockage. 2. Reduce ambient temperature. 3. Replace fan (see Subsection 6.5). Alarm Type LED LED COLOR Major UNIT Red Problem : The DEU detects an internal circuitry fault. POSSIBLE CAUSE CORRECTIVE ACTION/COMMENTS 1. Faulty DEU. 1. Replace DEU. Alarm Type LED LED COLOR Major HOST PORT Blinking Red Problem: The DEU is not receiving an optical signal from the DHU. POSSIBLE CAUSE CORRECTIVE ACTION/COMMENTS 1. Faulty forward path optical fiber between DEU and DHU (2). 2. Faulty optical receive port at DEU or faulty optical transmit port at DHU (2). 1. Clean optical connector and then test optical fiber. Repair or replace if faulty (see Subsection 6.4.2). 2. Make sure transceiver is fully plugged it and then test optical port. Replace optical transceiver if port is faulty (see Subsection 6.4.1). Alarm Type LED LED COLOR Minor OK/NOK Yellow Problem: The DEU is receiving a minor alarm signal from a connected DEU. POSSIBLE CAUSE CORRECTIVE ACTION/COMMENTS 1. The connected DEU is overheating. 1. Check DEU UNIT indicator and then refer to the appropriate troubleshooting section for procedures. Alarm Type LED LED COLOR Major OK/NOK Blinking Red Problem: The DEU is not receiving an optical signal from the DRU. POSSIBLE CAUSE CORRECTIVE ACTION/COMMENTS 1. Forward and reverse path optical fibers reversed between DEU and DRU. 2. Faulty reverse path optical fiber between DEU and DRU. 3. Faulty optical receive port at DEU or faulty optical transmit port at DRU. 1. Check fiber connections for correct polarity and reverse connectors at either unit if mismatched. 2. Clean optical connector and then test optical fiber. Repair or replace if faulty (see Subsection 6.4.2). 3. Make sure transceiver is fully plugged in and then test optical port. Replace optical transceiver if port is faulty (see Subsection 6.4.1). (Continued)
ADCP-75-132 • Issue 2C • August 2006 Page 52 © 2006, ADC Telecommunications, Inc. Table 12. DEU Fault Isolation and Troubleshooting Guidelines (Continued) Alarm Type LED LED COLOR Major OK/NOK Red Problem: The DEU is receiving a major alarm signal from the connected DRU. POSSIBLE CAUSE CORRECTIVE ACTION/COMMENTS 1. Faulty forward path optical fiber between DEU and DRU. 2. Faulty optical transmit port at DEU or faulty optical receive port at DRU. 3. The connected DRU is faulty. 1. Clean optical connector and then test optical fiber. Repair or replace if faulty (see Subsection 6.4.2). 2. Make sure transceiver is fully plugged in and then test optical port. Replace optical transceiver if port is faulty (see Subsection 6.4.1). 3. Check DRU STATUS indicator and then refer to appropriate troubleshooting section for procedures. Table 13. DRU Fault Isolation and Troubleshooting Guidelines Alarm Type LED LED COLOR Major STATUS Off Problem : The DRU is not powered. POSSIBLE CAUSE CORRECTIVE ACTION/COMMENTS 1. DC power cable open. 2. No power or insufficient power output from AC/DC power converter, DHU (1), or DEU (2). 3. Faulty DRU. 1. Test cable for continuity and repair or replace if faulty. 2. Check DC voltage level at the DRU (see Subsection 6.4.3). Replace converter, DHU, or DEU (whichever applies) if voltage is not within 34 to 48 VDC. 3. Replace DRU. Alarm Type LED LED COLOR Major STATUS Blinking Red Problem : The DRU is not receiving an optical signal from the DHU or DEU; or the DHU or DEU is not receiving an optical signal from the DRU. POSSIBLE CAUSE CORRECTIVE ACTION/COMMENTS 1. Faulty forward or reverse path optical fiber between DHU and DRU (1), DEU and DRU (2), or DEU and DHU (2). 2. Faulty optical transmit or receive port at the DHU (1) or DEU (2); or faulty optical transmit or receive port at DRU (1 and 2). 1. Clean optical connector and then test optical fiber. Repair or replace if faulty (see Subsection 6.4.2). 2. Make sure transceiver is fully plugged it and then test optical port. Replace optical transceiver if port is faulty (see Subsection 6.4.1). Alarm Type LED LED COLOR Major STATUS Red Problem: The DRU detects an internal circuitry fault. POSSIBLE CAUSE CORRECTIVE ACTION/COMMENTS 1. Faulty DRU. 1. Replace DRU.
ADCP-75-132 • Issue 2C • August 2006 Page 53 © 2006, ADC Telecommunications, Inc. Table 14. System Fault Isolation and Troubleshooting Guidelines Alarm Type LED LED COLOR None All Normal Problem: One or more of the DRU’s does not function following initial turn-up POSSIBLE CAUSE CORRECTIVE ACTION/COMMENTS 1. The DHU and DRU(s) frequency switches are set to different bands. 1. Reset DHU and DRU(s) frequency switches to the same band. Alarm Type LED LED COLOR None All Normal Problem: Loss of phone service from one DRU. Service normal at all other DRU’s. POSSIBLE CAUSE CORRECTIVE ACTION/COMMENTS 1. DRU antenna cable disconnected. 2. DRU antenna obstructed or misdirected. 3. DRU antenna faulty. 4. DRU faulty. 1. Re-connect DRU antenna cable to DRU. 2. Remove antenna obstruction or re-orient antenna. 3. Replace antenna. 4. Replace DRU. Alarm Type LED LED COLOR None All Normal Problem: Loss of phone service from all DRU’s. POSSIBLE CAUSE CORRECTIVE ACTION/COMMENTS 1. Local Interface: Faulty forward path coaxial connections between the DHU, HPCP and BTS. Faulty reverse path coaxial connec- tions between the DHU and BTS. 2. Remote Interface: Faulty forward or reverse path coaxial connections between the DHU and the RIU. Faulty coaxial connections between the RIU and donor antenna. 3. Faulty HPCP or RIU. 4. Faulty DHU 5. Fault with cellular network or equipment. 1. Check forward path signals at the HPCP and the DHU. Check reverse path signals at the BTS. 2. Check forward and reverse path signals at the DHU, RIU, and donor antenna. 3. Adjust or replace HPCP or RIU. 4. Replace DHU. 5. Contact cell service provider and verify that cellular network and equipment is operational. Alarm Type LED LED COLOR None All Normal Problem: Calls may be originated and terminated but service is noisy. POSSIBLE CAUSE CORRECTIVE ACTION/COMMENTS 1. Some electrical device in the immediate vicinity is creating interference. 1. Try turning off each device that may be causing interference and see if problem corrects itself. Alarm Type LED LED COLOR None All Normal Problem: Sudden high rate of blocked calls (delay dial tone). POSSIBLE CAUSE CORRECTIVE ACTION/COMMENTS 1. Too many users for the number of channels available. 2. Faulty DHU, DEU, or DRU. 1. Wait a few minutes and try dialing again. Upgrade service if additional channels are required. 2. Replace defective unit.
ADCP-75-132 • Issue 2C • August 2006 Page 54 © 2006, ADC Telecommunications, Inc. 6.4 Test Procedures 6.4.1 Optical Loopback Test Procedure Dirty optical connectors, a faulty optical transceiver, a break in an optical fiber, or a fault in an optical connector will interrupt communications between fiber-linked components. Use the following procedure to determine if a fault exists with an optical port or with an optical fiber: Danger: This equipment uses a Class 1 Laser according to FDA/CDRH rules. Laser radiation can seriously damage the retina of the eye. Do not look into the ends of any optical fiber. Do not look directly into the optical transceiver of any digital unit or exposure to laser radiation may result. An optical power meter should be used to verify active fibers. A protective cap or hood MUST be immediately placed over any radiating transceiver or optical fiber connector to avoid the potential of dangerous amounts of radiation exposure. This practice also prevents dirt particles from entering the transceiver or connector. 1. Put on the IR filtering safety glasses. 2. At the DHU or supporting DEU, place the PORT ON/OFF switch for the fiber port or fiber to be tested in the OFF position (press O). 3. Disconnect the optical connectors for the fiber port to be tested and place a dust cap over each connector. 4. Plug a loopback into the optical port to be tested as shown in Figure 26. 17277-AOPTICAL LOOPBACKCONNECTION DETAILPORT 1 OPTICALTRANSCEIVEROPTICALLOOPBACK Figure 26. DHU/DEU Loopback Test 5. At the DHU or supporting DEU, place the PORT ON/OFF switch in the ON position (press I).
ADCP-75-132 • Issue 2C • August 2006 Page 55 © 2006, ADC Telecommunications, Inc. 6. The PORT OK/NOK LED will turn either blinking red or green. If the LED turns blinking red, the optical port is faulty. Replace the optical transceiver and then recheck system operation. If the LED turns green, the optical port is good. Proceed to step 7 to continue the test procedure. 7. Place the PORT ON/OFF switch in the OFF position (press O). 8. Disconnect the loopback from the DHU or supporting DEU. 9. Clean and then reconnect the optical fiber connectors to the DHU or DEU optical port. 10. Disconnect the optical connectors at the DRU optical port or remote DEU host port (far end of fiber). 11. Clean the optical fiber connectors and then using an LC optical adapter, connect the loopback to the connectors as shown in Figure 27. 16768-BOPTICALADAPTEROPTICALLOOPBACKOPTICALCONNECTORNOTE: iF THE DISTANCE BETWEEN THE DHU/DEU AND THEDRU EXCEEDS THE DISTANCE SHOWN BELOW, THE REMOTE LOOPBACK TEST WILL NOT WORK.62.5 MICRON MULTI-MODE FIBER - 250 METERS50 MICRON MULTI-MODE FIBER - 375 METERS9 MICRON SINGLE-MODE FIBER - 5 KILOMETERS Figure 27. Optical Fiber Loopback Test 12. Insert a dust plug into the DRU optical port or remote DEU host port. 13. At the DHU or supporting DEU, place the PORT ON/OFF switch in the ON position (press I). 14. The PORT OK/NOK LED will turn either blinking red or green. If the LED turns blinking red, one of the optical fibers is faulty. Refer to Subsection 6.4.2 to isolate which fiber is at fault. If the LED turns green, the optical fibers are good. Proceed to step 14 to finish the test procedure. 15. At the DHU or supporting DEU, place the PORT ON/OFF switch in the OFF position (press O). 16. Disconnect the loopback and the optical adapters from the optical fiber connectors. 17. Place a dust cap over the connector for each optical fiber 18. Remove the dust plug from the DRU optical port or remote DEU host port. 19. Plug the loopback into the DRU optical port or DEU host port as shown in Figure 28. 20. If testing a DRU that is powered by the DHU or by a supporting DEU, place the PORT ON/OFF switch in the ON position (press I).
ADCP-75-132 • Issue 2C • August 2006 Page 56 © 2006, ADC Telecommunications, Inc. 17282-AOPTICAL LOOPBACKCONNECTION DETAILOPTICALTRANSCEIVEROPTICALLOOPBACK Figure 28. DRU Loopback Test 21. The DRU STATUS LED or DEU HOST LED will turn either blinking red or green. If the LED turns blinking red, the optical port is faulty and the optical transceiver must be replaced. If the LED turns green, the optical port is good. 22. At the DHU or supporting DEU, place the PORT ON/OFF switch in the OFF position (press O). 23. Remove the loopback from the DRU optical port or remote DEU host port. 24. Clean the optical fiber connectors and then reconnect the optical fibers to the DRU optical port or remote DEU host port. 25. At the DHU or supporting DEU, place the PORT ON/OFF switch in the ON position (press I). 26. Verify that the PORT OK/NOK LED turns green. 6.4.2 Optical Loss Test Procedure A break in an optical fiber or a fault with the optical connector will interrupt communications between linked components. Use the following procedure to isolate a problem with an optical fiber or optical connector: Danger: This equipment uses a Class 1 Laser according to FDA/CDRH rules. Laser radiation can seriously damage the retina of the eye. Do not look into the ends of any optical fiber. Do not look directly into the optical transceiver of any digital unit or exposure to laser radiation may result. An optical power meter should be used to verify active fibers. A protective cap or hood MUST be immediately placed over any radiating transceiver or optical fiber connector to avoid the potential of dangerous amounts of radiation exposure. This practice also prevents dirt particles from entering the transceiver or connector. 1. Put on the IR filtering safety glasses. 2. At the DHU or supporting DEU, place the PORT ON/OFF switch for the optical fiber to be tested in the OFF position (press O) if not already off.
ADCP-75-132 • Issue 2C • August 2006 Page 57 © 2006, ADC Telecommunications, Inc. 3. Disconnect the optical connectors at the DHU or supporting DEU and at the corresponding DRU or remote DEU. 4. Inspect the optical connectors. Verify that each connector is clean and that no scratches or imperfections are visible on the fiber end. Clean and polish the optical connector if necessary. 5. Connect a laser light source to one end of the first optical fiber and an optical power meter to the other end. 6. Verify that the power loss is within specifications (8 dB loss) for the length of the fiber installed. If the power loss is not within specifications, repair or replace the optical fiber and/or connector per local practice. 7. Repeat steps 5 and 6 for the second optical fiber. 8. Reconnect the optical connectors at the DHU or supporting DEU and the corresponding DRU or remote DEU. 9. At the DHU or supporting DEU, place the PORT ON/OFF switch for the fiber that was tested in the ON position (press I). 6.4.3 DC Power Test Procedure The DRU is powered by 34–48 VDC power which is supplied through the RJ-45 connector. Power to the DRU may be supplied by the DHU, DEU, or by a 120 VAC to 48 VDC power converter (available separately as an accessory item) plugged into a properly grounded 120 VAC outlet. Use the following procedure to test the DC power cable: 1. Disconnect the DC power cable from the DRU. 2. Connect the RJ-45 circuit access tool to the DRU as shown in Figure 29. POWERPORTPOWERCONNECTORRJ-45 CIRCUIT ACCESS TOOL17284-A Figure 29. Connect RJ-45 Circuit Access Tool
ADCP-75-132 • Issue 2C • August 2006 Page 58 © 2006, ADC Telecommunications, Inc. 3. Connect the DC power cable to the RJ-45 circuit access tool (see Figure 29). 4. Using a DC voltmeter, verify that the DC voltage level is between 34 and 48 VDC between any set of positive and negative (+/-) terminals at the RJ-45 circuit access tool as shown in Figure 30. Due to source current limiting at the DHU or DEU, low voltage can mean excess wire resistance, low source voltage, or excess remote current. Warning: The DRU uses 48 VDC power. To avoid electric shock or burns, use extreme care when working near exposed terminals or uninsulated cables. Be careful not to touch exposed terminals or to cause a short between terminals when checking voltage levels. 16206-BPOSITIVE (+)TEST POINTS1, 3, 5, AND 7 NEGATIVE (-)TEST POINTS2, 4, 6, AND 8 Figure 30. RJ-45 Circuit Access Tool Pin/Wire Designations 5. Disconnect RJ-45 circuit access tool from the DRU. 6. Use the DC voltmeter to check for open pin connections by checking for voltage between the +/– pairs on the RJ-45 circuit access tool (see Figure 30). 7. Disconnect the DC power cable from the RJ-45 circuit access tool. 8. Re-connect DC power cable to the DRU. 6.5 DHU or DEU Fan Replacement Procedure It is recommended that the fans (catalog # DGVI-100000FAN) be replaced every five years. Replacement of a fan requires that the DHU or DEU be turned off for a short period of time. This will drop all existing calls, cause a temporary loss of service, and generate a major alarm. Use the following procedure to replace the cooling fans within the DHU or the DEU: 1. Before touching the DHU or DEU or handling a fan, slip on an Electro-Static Discharge (ESD) wrist strap and connect the ground wire to an earth ground source. Wear the ESD wrist strap while completing each section of the fan installation procedure. Warning: Electronic components can be damaged by static electrical discharge. To prevent ESD damage, always wear an ESD wrist strap when working on the DHU or DEU and when handling electronic components. 2. Observe the fans (located on right side of enclosure) to determine which fan requires replacement. The faulty fan may be stopped, running at a reduced speed, or the fan bearing may be noisy. Note: Because the Mean Time Between Failures (MBTF) is the same for both fans, it may be more efficient to replace both fans at the same time.
ADCP-75-132 • Issue 2C • August 2006 Page 59 © 2006, ADC Telecommunications, Inc. 3. Notify the NOC or alarm monitoring system operator that the system is going offline. 4. Place the DHU or DEU AC power On/Off switch (see Figure 3 or Figure 7) in the OFF position (press O). 5. Remove the six flat-head screws (requires TORX screwdriver with T15 bit) that secure the fan/grill assembly to the side of the enclosure as shown in Figure 31 and save for reuse. 16172-B Figure 31. Fan/Grill Assembly Removal 6. Carefully withdraw the fan/grill assembly from the enclosure until the wiring harness is exposed and the connectors are accessible. 7. Lift the small latch on each wiring harness connector (see Figure 31) and carefully unplug each connector from the circuit board connector. 8. Remove the four plastic rivets that secure the faulty fan to the grill by pushing outward on rivet center post until the rivet can be withdrawn from the grill as shown in Figure 32. 9. Remove the faulty fan(s) from the grill and then locate the replacement fan(s). 10. Use the rivets removed in step 8 to secure the replacement fan to the grill. Orient the fan so the wiring harness is on the top and the arrow on the fan housing faces into the enclosure. 11. Connect the two wiring harness connectors to the circuit board connectors. 12. Secure the fan/grill assembly to the side of the enclosure (see Figure 31) using the six flat-head screws removed in step 5.
ADCP-75-132 • Issue 2C • August 2006 Page 60 © 2006, ADC Telecommunications, Inc. 16173-B Figure 32. Removing Fan From Grill 13. Place the DHU or DEU AC power On/Off switch in the ON position (press I). 14. Verify that the fans run properly following power up. 15. Notify the NOC or alarm monitoring system operator that the system is going back online. 6.6 DHU or DEU Modular Optical Transceiver Replacement Procedure The modular optical transceiver should be replaced when testing indicates that the transceiver has failed. Use the following procedure to replace an optical transceiver in a DHU or DEU: Danger: This equipment uses a Class 1 Laser according to FDA/CDRH rules. Laser radiation can seriously damage the retina of the eye. Do not look into the ends of any optical fiber. Do not look directly into the optical transceiver of any digital unit or exposure to laser radiation may result. An optical power meter should be used to verify active fibers. A protective cap or hood MUST be immediately placed over any radiating transceiver or optical fiber connector to avoid the potential of dangerous amounts of radiation exposure. This practice also prevents dirt particles from entering the transceiver or connector. 1. Put on the IR filtering safety glasses. 2. Slip on an Electro-Static Discharge (ESD) wrist strap and connect the ground wire to an earth ground source such as the grounding stud on the DHU or DEU front panel. Wear the ESD wrist strap while completing the optical transceiver replacement procedure. Warning: Electronic components can be damaged by static electrical discharge. To prevent ESD damage, always wear an ESD wrist strap when handling electronic components. 3. Place the PORT ON/OFF switch for the optical transceiver being replaced in the OFF position (press O).
ADCP-75-132 • Issue 2C • August 2006 Page 61 © 2006, ADC Telecommunications, Inc. Note: The HOST PORT on the DEU does not have an On/Off switch and can only be disabled by placing the DEU AC power On/Off switch in the OFF position (press O). Turning off the power to the DEU will create an alarm condition. If the DEU must be turned off, inform the NOC or alarm monitoring system operator that an alarm will be reported. 4. Disconnect the optical fiber connectors from the optical transceiver and place a dust cap over each connector. 5. Release the optical transceiver from the transceiver socket by pulling outward on the release lever (if type A) or release tab (if type B) as shown in Figure 33. TYPE ATRANSCEIVERTYPE BTRANSCEIVER17283-ARELEASE TABRELEASELEVERTRANSCEIVER COLOR CODEBLUE = SINGLE-MODE (9 MICRON)BLACK/BEIGE = MULTI-MODE (50 OR 62.5 MICRON) Figure 33. DHU or DEU Optical Transceiver Removal 6. Remove the optical transceiver from the transceiver socket. 7. For replacement, select an optical transceiver that corresponds to the type of fiber (single- or multi-mode) used in the installation. The color of the transceiver corresponds to the transceiver fiber type (see Figure 33). 8. Remove the optical transceiver from the anti-static packaging and orient for installation as shown in Figure 34. Note: Two types of optical transceivers, type A and type B, are available. Both types provide the same functionality. On the type A optical transceiver, the release lever (see Figure 34) must be closed for installation.
ADCP-75-132 • Issue 2C • August 2006 Page 62 © 2006, ADC Telecommunications, Inc. TXRXDETAIL DRAWINGOF TYPE A AND TYPE BMODULAR OPTICALTRANSCEIVERSTX RXTYPE ATRANSCEIVERTYPE BTRANSCEIVERRELEASELEVERRELEASE TAB17280-A Figure 34. DHU or DEU Optical Transceiver Installation 9. Insert the optical transceiver into the socket until it locks into place. 10. Clean the optical fiber connectors and reconnect to the optical transceiver. 11. Place the PORT ON/OFF switch for the optical transceiver that was replaced in the ON position (press I). Note: If the DEU was turned off to replace the HOST PORT optical transceiver, place the DEU AC power On/Off switch in the ON position (press I) and inform the NOC or alarm monitoring system operator that the alarm has been cleared. 12. Verify that the DHU or DEU optical port LED indicators shown normal optical port operation (refer to Table 7 or 8). 6.7 DRU Modular Optical Transceiver Replacement Procedure The modular optical transceiver should be replaced when testing indicates that the transceiver has failed. Use the following procedure to replace an optical transceiver in a DRU: Danger: This equipment uses a Class 1 Laser according to FDA/CDRH rules. Laser radiation can seriously damage the retina of the eye. Do not look into the ends of any optical fiber. Do not look directly into the optical transceiver of any digital unit or exposure to laser radiation may result. An optical power meter should be used to verify active fibers. A protective cap or hood MUST be immediately placed over any radiating transceiver or optical fiber connector to avoid the potential of dangerous amounts of radiation exposure. This practice also prevents dirt particles from entering the transceiver or connector. 1. Put on the IR filtering safety glasses. 2. Slip on an Electro-Static Discharge (ESD) wrist strap and connect the ground wire to an earth ground source. Wear the ESD wrist strap while completing the optical transceiver replacement procedure. Warning: Electronic components can be damaged by static electrical discharge. To prevent ESD damage, always wear an ESD wrist strap when handling electronic components.
ADCP-75-132 • Issue 2C • August 2006 Page 63 © 2006, ADC Telecommunications, Inc. 3. Disconnect the DC power cable connector from the RJ-45 power jack on the DRU front panel. Note: Disconnecting the power from the DRU will create an alarm condition. Inform the NOC or alarm monitoring system operator that the alarm will be reported. 4. Disconnect the optical fiber connectors from the optical transceiver and place a dust cap over each connector. 5. Release the optical transceiver from the transceiver socket by pulling outward on the release lever (if type A) or release tab (if type B) as shown in Figure 35. 17285-ATYPE ATRANSCEIVERTYPE BTRANSCEIVERRELEASELEVERRELEASE TABTRANSCEIVER COLOR CODEBLUE = SINGLE-MODE (9 MICRON)BLACK/BEIGE = MULTI-MODE (50 OR 62.5 MICRON) Figure 35. DRU Optical Transceiver Removal 6. Remove the optical transceiver from the transceiver socket. 7. For replacement, select an optical transceiver that corresponds to the type of fiber (single- or multi-mode) used in the installation. The color of the transceiver corresponds to the fiber type (see Figure 35). 8. Remove the optical transceiver from the anti-static packaging and orient for installation as shown in Figure 36. Note: Two types of optical transceivers, type A and type B, are available. Both types provide the same functionality. On the type A optical transceiver, the release lever (see Figure 36) must be closed for installation.
ADCP-75-132 • Issue 2C • August 2006 Page 64 © 2006, ADC Telecommunications, Inc. TXRXDETAIL DRAWINGOF TYPE A AND TYPE BMODULAR OPTICALTRANSCEIVERSTXRXTYPE ATRANSCEIVERTYPE BTRANSCEIVERRELEASELEVERRELEASE TAB17286-A Figure 36. DRU Optical Transceiver Installation 9. Insert the optical transceiver into the socket until it locks into place. 10. Clean the optical fiber connectors and reconnect to the optical transceiver. 11. Reconnect the DC power cable plug to the RJ-45 jack on the DRU front panel and inform the NOC or alarm monitoring system operator that the alarm has been cleared. 12. Verify that the DRU LED indicator shows normal operation (refer to Table 9).
ADCP-75-132 • Issue 2C • August 2006 Page 65 © 2006, ADC Telecommunications, Inc. 7 GENERAL INFORMATION 7.1 Warranty/Software The Product and Software warranty policy and warranty period for all ADC products is published in ADC’s Warranty/Software Handbook. Contact the Technical Assistance Center at 1-800-366-3891, extension 73476 (in U.S.A. or Canada) or 952-917-3476 (outside U.S.A. and Canada) for warranty or software information or for a copy of the Warranty/Software Handbook. 7.2 Software Service Agreement ADC software service agreements for some ADC Products are available at a nominal fee. Contact the Technical Assistance Center at 1-800-366-3891, extension 73476 (in U.S.A. or Canada) or 952-917-3476 (outside U.S.A. and Canada) for software service agreement information. 7.3 Repair/Exchange Policy All repairs of ADC Products must be done by ADC or an authorized representative. Any attempt to repair or modify ADC Products without authorization from ADC voids the warranty. If a malfunction cannot be resolved by the normal troubleshooting procedures, contact the Technical Assistance Center at 1-800-366-3891, extension 73476 (in U.S.A. or Canada) or 952-917-3476 (outside U.S.A. and Canada). A telephone consultation can sometimes resolve a problem without the need to repair or replace the ADC Product. If, during a telephone consultation, ADC determines the ADC Product needs repair, ADC will authorize the return of the affected Product for repair and provide a Return Material Authorization number and complete shipping instructions. If time is critical, ADC can arrange to ship the replacement Product immediately. In all cases, the defective Product must be carefully packed and returned to ADC.
ADCP-75-132 • Issue 2C • August 2006 Page 66 © 2006, ADC Telecommunications, Inc. 7.4 Repair Charges If the defect and the necessary repairs are covered by the warranty, and the applicable warranty period has not expired, the Buyer’s only payment obligation is to pay the shipping cost to return the defective Product. ADC will repair or replace the Product at no charge and pay the return shipping charges. Otherwise, ADC will charge a percentage of the current Customer Product price for the repair or NTF (No Trouble Found). If an advance replacement is requested, the full price of a new unit will be charged initially. Upon receipt of the defective Product, ADC will credit Buyer with 20 percent of full price charged for any Product to be Out-of-Warranty. Products must be returned within (30) days to be eligible for any advance replacement credit. If repairs necessitate a visit by an ADC representative, ADC will charge the current price of a field visit plus round trip transportation charges from Minneapolis to the Buyer’s site. 7.5 Replacement/Spare Products Replacement parts, including, but not limited to, button caps and lenses, lamps, fuses, and patch cords, are available from ADC on a special order basis. Contact the Technical Assistance Center at 1-800-366-3891, extension 73476 (in U.S.A. or Canada) or 952-917-3476 (outside U.S.A. and Canada) for additional information. Spare products and accessories can be purchased from ADC. Contact Sales Administration at 1-800-366-3891, extension 73000 (in U.S.A. or Canada) or 952-938-8080 (outside U.S.A. and Canada) for a price quote and to place your order. 7.6 Returned Material Contact the ADC Product Return Department at 1-800-366-3891, extension 73748 (in U.S.A. or Canada) or 952-917-3748 (outside U.S.A. and Canada) to obtain a Return Material Authorization number prior to returning an ADC Product. All returned Products must have a Return Material Authorization (RMA) number clearly marked on the outside of the package. The Return Material Authorization number is valid for 90 days from authorization.
ADCP-75-132 • Issue 2C • August 2006 Page 67 7.7 Customer Information and Assistance 13944-MWRITE:ADC TELECOMMUNICATIONS, INCPO BOX 1101,MINNEAPOLIS, MN 55440-1101, USAADC TELECOMMUNIC ATIONS (S'PORE) PTE. LTD.100 BEACH ROAD, #18-01, SHAW TOWERS.SINGAPORE 189702.ADC EUROPEAN CUSTOMER SERVICE, INCBELGICASTRAAT 2,1930 ZAVENTEM, BELGIUMPHONE:EUROPESales Administration: +32-2-712-65 00Technical Assistance: +32-2-712-65 42EUROPEAN TOLL FREE NUMBERSUK: 0800 960236Spain: 900 983291France: 0800 914032Germany: 0180 2232923U.S.A. OR CANADASales: 1-800-366-3891 Extension 73000Technical Assistance: 1-800-366-3891 Connectivity Extension 73475 Wireless Extension 73476ASIA/PACIFICSales Administration: +65-6294-9948Technical Assistance: +65-6393-0739ELSEWHERESales Administration: +1-952-938-8080Technical Assistance: +1-952-917-3475Italy: 0800 782374PRODUCT INFORMATION AND TECHNICAL ASSISTANCE:Contents herein are current as of the date of publication. ADC reserves the right to change the contents without prior notice.In no event shall ADC be liable for any damages resulting from loss of data, loss of use, or loss of profits and ADC furtherdisclaims any and all liability for indirect, incidental, special, consequential or other similar damages. This disclaimer ofliability applies to all products, publications and services during and after the warranty period. This pu blication may beverified at any time by contacting ADC's Technical Assistance Center. euro.tac@adc.comasiapacific.tac@adc.comwireless.tac@adc.comconnectivity.tac@adc.com © 2006, ADC Telecommunications, Inc.All Rights Reserved
iwww.adc.com

Navigation menu