ADCP-75-158 • Issue 1 • July 2003 • Section 4: Operation 2. Right-click on the Host Fwd Delay section of the display (see Figure 4-14). The Host Fwd Delay pop-up screen will open as shown in Figure 4-15. 3. Obtain the value of the forward delay as specified in the system design plan. The delay is adjustable in 0.1 µsec steps. 4. Enter the forward path delay value and click OK to close the pop-up screen and to make the changes take effect. 5.
ADCP-75-158 • Issue 1 • July 2003 • Section 5: Maintenance SECTION 5: MAINTENANCE 1 SYSTEM MAINTENANCE OVERVIEW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-1 2 FAULT DETECTION AND ALARM REPORTING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-2 3 FAULT ISOLATION AND TROUBLESHOOTING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ADCP-75-158 • Issue 1 • July 2003 • Section 5: Maintenance • Optical power meter (1550 and 1310 nm) • TORX screwdriver (with T10 bit) 2 FAULT DETECTION AND ALARM REPORTING The Digivance system on-board embedded software detects various unit and system faults and reports them as either Major or Minor alarms. A Major alarm indicates that the system has failed in a way that directly affects RF transport performance. This usually means that some calls or perhaps all calls cannot be made over the system.
ADCP-75-158 • Issue 1 • July 2003 • Section 5: Maintenance Table 5-1. Host Unit LED Indicators INDICATOR COLOR DESCRIPTION Green Off Indicates if the HU is powered or un-powered. The DC power source is on. The DC power source is off. POWER STANDBY Indicates if the system is in the standby, normal, test, or program load mode. Green (blinking) The HU is in the standby mode. Yellow (blinking) The HU is in the program load mode. Red (blinking) The HU is in the test mode. The HU is in the normal mode.
ADCP-75-158 • Issue 1 • July 2003 • Section 5: Maintenance Table 5-3. Spectrum Transport Module LED Indicators INDICATOR COLOR DESCRIPTION Green Red Indicates if the STM is powered by the AC power source or the back-up battery system. The STM is powered by the AC power source. The STM is powered by the back-up battery system. AC POWER STANDBY Indicates if the system is in the standby, normal, test, or program load mode. Green (blinking) The STM is in the standby mode.
ADCP-75-158 • Issue 1 • July 2003 • Section 5: Maintenance 3 FAULT ISOLATION AND TROUBLESHOOTING Alarm information may be accessed and faults isolated using the information provided by the unit front panel LED indicators, the EMS software GUI alarm displays, or the NOC-EMS interface.
ADCP-75-158 • Issue 1 • July 2003 • Section 5: Maintenance Table 5-6. Remote Unit Minor Alarms MINOR ALARM LED INDICATOR LED INDICATOR Temperature STM Sec Laser Fail (Does not apply) Sec Rev Mux Lock (Does not apply) Sec Rev Synth Lock (Does not apply) Rev Path Level (Does not apply) LPA Disable STATUS (LPA) LPA Fan PA LPA High Temp PA RF Out Very Low (Does not apply) Minor Extern Alarm Inp (Does not apply) 3.
ADCP-75-158 • Issue 1 • July 2003 • Section 5: Maintenance Table 5-7. Host Unit Fault Isolation and Troubleshooting, continued LED: HOST UNIT Color: Red Alarm Type: Major PROBLEM: A major alarm fault detected by HU. POSSIBLE CAUSE CORRECTIVE ACTION/COMMENTS 1. Fiber optic link fault. 2. HU and STM band mismatch. 3. The HU has failed. 1. Follow procedure specified when the PORT 1/ PORT 2 LED is red. 2. Replace HU or STM with correct unit. 3. Replace the HU.
ADCP-75-158 • Issue 1 • July 2003 • Section 5: Maintenance 3.2 STM Troubleshooting During normal STM operation, all LED’s should be green except the STANDBY LED which should be Off. When a Minor alarm occurs, one or more of the LED’s will turn yellow. When a Major alarm occurs, one or more of the LED’s will turn red. It is recommended that whenever there are multiple alarms, the optical alarms should be checked and cleared first.
ADCP-75-158 • Issue 1 • July 2003 • Section 5: Maintenance Table 5-8. STM Fault Isolation and Troubleshooting, continued LED: STM Color: Red Alarm Type: Major PROBLEM: A major alarm fault detected by the STM. POSSIBLE CAUSE CORRECTIVE ACTION/COMMENTS 1. Fiber optic link fault. 2. The HU is not powered. 3. HU and STM band mismatch. 4. The STM has failed. 1. Follow procedure specified when the PORT 1/ PORT 2 LED is red. 2. Check HU LED indicators and refer to Table 5-7 3.
ADCP-75-158 • Issue 1 • July 2003 • Section 5: Maintenance 3.3 LPA Troubleshooting During normal LPA operation, the STATUS LED should be blinking green (normal operation) or blinking yellow (minor fault). Table 5-9. LPA Fault Isolation and Troubleshooting LED: STATUS Color: Green Alarm Type: None PROBLEM: The LPA is in the forced shutdown state. POSSIBLE CAUSES 1.The MUTE/NORM/RESET switch is in the MUTE position. 2. The Digivance system is in the STANDBY mode. 1.
ADCP-75-158 • Issue 1 • July 2003 • Section 5: Maintenance 4 TEST PROCEDURES This section provides procedures for common troubleshooting and maintenance tests. Refer to these procedures as needed when specified in the Fault Isolation and Troubleshooting tables in Section 3. 4.1 Optical Power Test A break in an optical fiber or a fault with the optical connector will interrupt communications between linked components or generate excessive errors.
ADCP-75-158 • Issue 1 • July 2003 • Section 5: Maintenance 10. At the far end HU or STM, place the On/Off switch in the OFF position (press O). 11. Disconnect the optical power meter from the near end of the optical fiber. 12. Connect the optical power meter to the far end HU (Port 1) or STM (Port 2). 13. At the far end HU or STM, place the On/Off switch in the ON position (press I). 14. Measure the optical output power of the far end HU or STM.
ADCP-75-158 • Issue 1 • July 2003 • Section 5: Maintenance 5. Plug a 15 dB in-line optical attenuator into the PORT 1 optical port. 6. Connect a patch cord between the optical attenuator and the PORT 2 optical port. 7. Place the On/Off switch in the ON position (press I) and observe the PORT 1/PORT 2 LED indicator. 8. The PORT 1/PORT 2 LED indicator will turn either red or green. If the LED turns red, either the PORT 1 optical transmitter or the PORT 2 receiver is faulty.
ADCP-75-158 • Issue 1 • July 2003 • Section 5: Maintenance 5 MAINTENANCE PROCEDURES This section specifies the system maintenance requirements and provides the procedures for the required maintenance tasks. Refer to these procedures as needed when specified in the Scheduled Maintenance table. 5.1 Scheduled Maintenance Table 5-10 lists the items that require regular maintenance and the recommended maintenance interval.
ADCP-75-158 • Issue 1 • July 2003 • Section 5: Maintenance SET SCREWS FILTER - PLACE FOAM STRIP SIDE DOWN 18614-B Figure 5-1. Cabinet Filter Removal and Replacement 5.3 Host Unit Fan Replacement Procedure The HU is equipped with two cooling fans which are located on the right side of the HU enclosure. The cooling fans blow cool air into the enclosure. Heated air is exhausted through the vent openings on the left side of the enclosure.
ADCP-75-158 • Issue 1 • July 2003 • Section 5: Maintenance 18615-A Figure 5-2. Host Unit Fan/Grill Assembly Removal 7. Remove the plastic rivets that secure each fan to the grill by pushing outward on the rivet center post until the rivet can be withdrawn from the grill as shown in Figure 5-3. 16173-B Figure 5-3. Removing Host Unit Fans From Grill 8. Remove both fans from the grill 9. Use the rivets removed in step 7 to secure the replacement fans to the grill.
ADCP-75-158 • Issue 1 • July 2003 • Section 5: Maintenance 5.4 Spectrum Transport Module Fan Replacement Procedure The STM is equipped with a rear-mounted cooling fan. The rear fan exhausts heated air from the STM housing. Replacement of the fan requires that the STM be turned off for a short period of time and that the STM be removed from the outdoor cabinet or indoor mounting shelf. Use the following procedure to remove and replace the STM cooling fan. 1.
ADCP-75-158 • Issue 1 • July 2003 • Section 5: Maintenance 16992-A Figure 5-5. STM Fan/Grill Assembly Removal 7. Carefully withdraw the fan/grill assembly from the STM housing until the wiring harness is exposed and the connector is accessible. 8. Lift the small latch on the wiring harness connector and carefully unplug the connector from the circuit board connector. 9.
ADCP-75-158 • Issue 1 • July 2003 • Section 5: Maintenance 11. Use the rivets removed in step 9 to secure the replacement fan to the mounting plate and grill. Orient the fan so the wiring harness is on the top and the arrow on the fan points away from the enclosure. Make certain the rubber grommets are left in place on the mounting plate. 12. Connect the wiring harness connector to the circuit board connector. 13.
ADCP-75-158 • Issue 1 • July 2003 • Section 5: Maintenance 18769-A Figure 5-7. LPA Fan/Front Panel Assembly Removal ARROW MUST POINT TOWARD ENCLOSURE SPLIT WASHER AND NUT (4 PLACES) PHILLIPS HEAD SCREW (4 PLACES) 18768-A Figure 5-8. Removing LPA Fan From Front Panel 10. Use the screws, split-washers, and nuts removed in step 8 to secure the replacement fan and grill to the front panel.
ADCP-75-158 • Issue 1 • July 2003 • Section 5: Maintenance 14. Place the STM On/Off switch in the ON position (press I) 15. Verify that the fan operates properly. The fan should exhaust air from the rear side of the LPA. 16. Notify the NOC or alarm monitoring system operator that the system is going back online. Page 5-21 © 2003, ADC Telecommunications, Inc.
ADCP-75-158 • Issue 1 • July 2003 • Section 5: Maintenance Blank Page 5-22 © 2003, ADC Telecommunications, Inc.
ADCP-75-158 • Issue 1 • July 2003 • Section 6: General Information SECTION 6: GENERAL INFORMATION Content Page 1 WARRANTY/SOFTWARE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-1 2 SOFTWARE SERVICE AGREEMENT. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-1 3 REPAIR/EXCHANGE POLICY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ADCP-75-158 • Issue 1 • July 2003 • Section 6: General Information 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).
ADCP-75-158 • Issue 1 • July 2003 • Section 6: General Information 7 CUSTOMER INFORMATION AND ASSISTANCE PHONE: EUROPE Sales Administration: +32-2-712-65 00 Technical Assistance: +32-2-712-65 42 EUROPEAN TOLL FREE NUMBERS Germany: 0180 2232923 UK: 0800 960236 Spain: 900 983291 France: 0800 914032 U.S.A.
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