NEC of America 58155N NLite N 5.8 GHz Digital Microwave Radio User Manual mainte
NEC Corporation of America NLite N 5.8 GHz Digital Microwave Radio mainte
Contents
User Manual - Part IV
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| Document ID | 1263944 |
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| Document Description | User Manual - Part IV |
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| Date Submitted | 2010-04-09 00:00:00 |
| Date Available | 2010-04-09 00:00:00 |
| Creation Date | 2009-07-30 14:03:10 |
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CONTENTS ROI-S07046-051E July, 2009 NLite N 6-38 GHz DIGITAL RADIO SYSTEM Section IV MAINTENANCE CONTENTS TITLE PAGE GENERAL ••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••• 1-1 PRECAUTIONS •••••••••••••••••••••••••••••••••••••••••••••••••••••• 2-1 TEST SETS AND ACCESSORIES ••••••••••••••••••••••••••••••• 3-1 ROUTINE MAINTENANCE •••••••••••••••••••••••••••••••••••••••• 4-1 4.1 Meter Reading ••••••••••••••••••••••••••••••••••••••••••••••••••• 4-1 4.2 Performance Monitoring•••••••••••••••••••••••••••••••••••••• 4-2 CORRECTIVE MAINTENANCE •••••••••••••••••••••••••••••••••• 5-1 5.1 Alarm/Status ••••••••••••••••••••••••••••••••••••••••••••••••••••• 5-1 5.1.1 Alarm and Status ••••••••••••••••••••••••••••••••••••••••••••••• 5-2 5.1.2 Control Item •••••••••••••••••••••••••••••••••••••••••••••••••••••• 5-8 5.1.3 Loopback •••••••••••••••••••••••••••••••••••••••••••••••••••••••• 5-10 5.1.4 In-band Loopback ••••••••••••••••••••••••••••••••••••••••••••• 5-15 5.1.5 BER Measurement •••••••••••••••••••••••••••••••••••••••••••• 5-22 5.1.6 Trouble Shooting Flow••••••••••••••••••••••••••••••••••••••• 5-23 5.2 Replacement •••••••••••••••••••••••••••••••••••••••••••••••••••• 5-28 5.2.1 TRP Replacement ••••••••••••••••••••••••••••••••••••••••••••• 5-28 5.2.2 MDP and Module Replacement •••••••••••••••••••••••••••• 5-34 5.2.3 ALL INDOOR TRP Replacement ••••••••••••••••••••••••••• 5-47 5.2.4 Fuse Replacement •••••••••••••••••••••••••••••••••••••••••••• 5-50 CL-1 CONTENTS ROI-S07046 (This page is intentionally left blank.) CL-2 2 pages GENERAL ROI-S07046 1. GENERAL This section provides instructions for maintenance of the NLite N used for 6-38 GHz microwave radio system. This section provides instructions on the precautions, test setup and accessories, routine maintenance, corrective maintenance and mounting of optional modules. 1-1 GENERAL ROI-S07046 (This page is intentionally left blank.) 1-2 2 pages PRECAUTIONS ROI-S07046 2. PRECAUTIONS The following maintenance. precautions must be carefully observed during (a) The maintenance personnel should report arrival and departure from a station to the relevant station. The following are dangers and warnings to the maintenance personnel. Warning: 1. The –48 V DC power is superimposed on the centre conductor of the coaxial cable between the MDP and the TRP/ALL INDOOR TRP. Connecting test equipment directly to this terminal may damage it and touching the coaxial cable core may cause electrical shock. 2. Persons performing maintenance must take necessary steps to avoid Electro-static Discharge (ESD) which may damage the modules on the MDP or cause error. Wear a conductive wrist strap connected to the grounded (G) jack on the front of the equipment shelf. This will minimize static build-up during maintenance. (see Fig. 2-1). 3. Do not remove/connect the IF cable with the MDP power ON. Turn the MDP power OFF before connecting/ disconnecting the IF cable, or equipment may be damaged. 4. After turning ON the equipment, wait at least 1 minute before turning it OFF again. Repeatedly turning the power ON and OFF within a short interval may cause the MDP to fail. 5. Do not allow open or short circuit of TRP/ALL INDOOR TRP TX output with the TX power on conditions. Perform the TX Mute control in the Maintenance mode or turn the PWR switch off at the MDP before disconnecting cable or feeder from the TRP/ALL INDOOR TRP TX output. 6. Contact NEC before program download on the LCT is performed. Equipment may not function correctly with improper operation. Caution: 1. The top surface of the MDP above MODEM is hot in operation. 2. When replacing the MODEM, 2P LAN INTFC or DCDC CONV (optional) turn off the PWR switch and disconnect all cables connected to the module which is to be replaced. 2-1 PRECAUTIONS ROI-S07046 (b) During maintenance, the MDP should be set to Maintenance “On” condition by the local craft terminal (LCT). (c) To avoid traffic interruption, under the maintenance, perform TX/ RX SW manual switching in 1+1 system. Note: When TX/RX SW has been automatically switched during a fault, keep this condition by manual switching operation. (d) While the CPU is initialized by the CPU RESET switch, alarm(s) status is reset to normal. After initialization, the alarm information is properly provided through relay contacts. (e) Information on the maintenance and the control such as Mute, CW, LB, etc. is released if the power is turned off. (f) If each setup item of “Equipment Setup” or “Provisioning” is changed during in operation, traffic will be momentarily interrupted. (g) When the TX SW is activated, momentary traffic interruption may occurs. (h) Before removing or installing the MDP/TRP, turn off the power switch on the MODEM. (i) After completing maintenance, restore all connections, manual control settings to normal and confirm that all alarm LEDs are unlit. (j) When replacing the MODEM or 2P LAN INTFC with spare, disconnect every cables connected to the module which is to be replaced, then turn off the power switch on the MODEM, surely. (k) After equipment start-up, allow the equipment to warm up at least 30 minutes. 2-2 PRECAUTIONS ROI-S07046 Straight Type Caution Tighten the TNC-male connector of IF cable to the MDP with engage connector nut only using fingers and holding the cable with another hand. MDP IF CABLE L-Angle Type MDP Tighten the engage connector nut only for the L-angle connector also. (Tightening Torque : 0.3 to 0.5 N•m (3 to 5kg•cm)) IF CABLE L Angle Type MDP If rotate other parts of the L-angle connector as illustrated left, it can cause connector damage. IF CABLE 2-3 PRECAUTIONS ROI-S07046 Chart 2-1 Wrist Strap Connection Step Procedure Connect the wrist strap to the ESD ground terminal (G). ! IF IN/OUT Ns XIF IN XIF OUT XPIC CTRL TX RX XPIC RESET PWR TRP MD/ CBL SELV PULL ALM PWR WS IN/OUT DS1 IN/OUT 100M PORT 1 PORT 2 MAINT MEMORY MDP (Blank) LCT 1+0 SYSTEM NMS AUX/ALM NE Ns 100M PROTECT SC IN/OUT EOW CALL MMC PORT 1 PORT 2 MDP ! IF IN/OUT Ns XIF IN XIF OUT XPIC CTRL TX RX XPIC RESET PWR TRP MD/ CBL SELV PULL PULL ALM PWR WS IN/OUT DS1 IN/OUT 100M ! IF IN/OUT Ns XIF IN XIF OUT XPIC CTRL TX RX XPIC RESET PWR TRP MD/ CBL SELV LCT PWR 1+1 SYSTEM NMS AUX/ALM NE Ns MAINT MEMORY MDP SC IN/OUT MDP DS1 IN/OUT (CH1 to CH8) Fig. 2-1 ESD Ground Terminal Location L6/U6/11 GHz ALL INDOOR TRP ALL INDOOR Type TRP Fig. 2-2 Location of G Terminal (TRP) 2-4 100M PROTECT EOW CALL MMC PRECAUTIONS ROI-S07046 Chart 2-2 Maintenance Mode Setting Step Procedure For the LCT operation, refer to Chapter 6 of LCT Operation in Appendix of this Section IV. Maintenance Mode Setting ! IF IN/OUT Ns XIF IN XIF OUT XPIC CTRL TX RX XPIC RESET PWR TRP MD/ CBL SELV Connect the USB port and the LCT port of the PC and the LCT using a USB cable. (see Fig. 2-3) G PULL ALM PWR WS IN/OUT 100M DS1 IN/OUT PORT 1 PORT 2 PROTECT MAINT MEMORY MDP (Blank) LCT NMS NE AUX/ALM Ns 100M SC IN/OUT EOW CALL MMC PORT 1 PORT 2 1+0 SYSTEM LCT Port ! IF IN/OUT Ns XIF IN XIF OUT XPIC CTRL TX RX XPIC RESET PWR TRP MD/ CBL SELV PULL PULL ALM PWR WS IN/OUT 100M DS1 IN/OUT ! IF IN/OUT Ns XIF IN XIF OUT XPIC CTRL TX RX XPIC RESET PWR TRP MD/ CBL SELV PWR LCT NMS NE AUX/ALM 100M Ns PROTECT MAINT MEMORY MDP SC IN/OUT EOW CALL MMC 1+1 SYSTEM LCT Port USB Cable Note: Use the typical USB shielded cable. (Do not use the un-shielded cable.) USB Port PC Fig. 2-3 LCT Setup 2-5 PRECAUTIONS ROI-S07046 Chart 2-2 Maintenance Mode Setting (Cont’d) Step Procedure Enter User name “Admin” and enter the valid Password. Click on “Login” button. Click on “Maintenance” button in “LCT MENU”. LCT MENU Alarm/Status Equipment Setup Inventory AUX I/O Maintenance Maintenance1 Maintenance2 Provisioning Metering PMON(History) Click on “Maintenance1” button in “Maintenance” background menu. ---Maintenance1--Item Maintenance 2-6 Value Off Setting Off On Set PRECAUTIONS ROI-S07046 Chart 2-2 Maintenance Mode Setting (Cont’d) Step Procedure Click on “On” Setting button of the Maintenance, click on “Set” button, then Maintenance Value turns to “On” and Maintenance status in “Summary Status area turns to “On”. ---Maintenance1--Item Maintenance Value On Setting Off On Set Summary Status Maintenance On Notes: 1. To perform setup and control the equipment, it must be set to Maintenance “On” mode using LCT. 2. In Maintenance “On” mode, RL3 to RL6 external alarm outputs are masked and automatic control is inhibited. Restoring to Normal Mode Click on “Maintenance1” button. Click on “Off” or “Auto” control button and click “Set” button for each control item which has been manually controlled. Click on “Off” setting button of Maintenance. 10 Check that there is not coloured yellow items and Maintenance “Off”, is displayed in Progress Status. Note: To restore the Maintenance mode to normal mode, first reset the control from control “On” to control “Off” (or Auto), then set the mode to Maintenance “Off”. 2-7 PRECAUTIONS ROI-S07046 Chart 2-3 Manual Switchover Operation (only 1+1 Configuration) Step Procedure For the LCT operation, refer to Chapter 6 of LCT Operation in Appendix of this Section IV. Connect the USB port and the LCT port of the PC and the LCT using a USB cable, (see Fig. 2-3) Login to the LCT with User name “Admin” and Admin “Password”. Click on “Maintenance” button in “LCT MENU” and click on “Maintenance1” button in Maintenance background menu. Notes 1. Control items can be performed only when the MAINT mode is “On”. 2. Control items displayed on the LCT vary depending on system configuration. Click on TX SW and/or RX SW to desired “No.1”, “No.2” or “Auto” button. Click on “Set” button. ---Maintenance1--Item Maintenance Value On TX SW Manual Control RX SW Manual Control No.1 Auto 2-8 8 pages Setting Off Auto Auto On No.1 No.1 Set No.2 No.2 Set Set After test has been completed, set the TX SW and RX SW to “Auto” position. Set maintenance mode to “Off” according to Chart 2-2. TEST SETS AND ACCESSORIES ROI-S07046 3. TEST SETS AND ACCESSORIES The test sets and special accessories listed in Table 3-1 are required for maintenance. If recommended test sets and accessories are not available, equivalents may be used. Table 3-1 Test Sets and Accessories No. Model Type Model Number Manufacture SONET/SDH/PDH Analyzer XTA Modules CMA5000a /MP1570A* ANRITSU Optical Variable Attenuator MN95D ANRITSU Digital Multimeter 34401A Agilent Screwdriver — — T Type Hexagonal Driver — — Torque Wrench — — PC for Local Craft Terminal (LCT)** — — Notes:1. * Discontinued Model. 2. ** Refer LCT Operation in Appendix in this Section IV. 3-1 TEST SETS AND ACCESSORIES (This page is intentionally left blank.) 3-2 2 pages ROI-S07046 ROUTINE MAINTENANCE ROI-S07046 4. ROUTINE MAINTENANCE This chapter provides the routine (annually) maintenance procedures to ensure the satisfactory operation of the equipment. During routine maintenance, carefully observe the precautions given in Chapter 2. 4.1 Meter Reading Chart 4-1 Meter Reading Step LCT MENU Procedure For the LCT operation, refer to Chapter 6 of LCT Operation in Appendix of this Section IV. Alarm/Status Equipment Setup Inventory AUX I/O Maintenance Provisioning Metering PMON (History) Connect the PC to the MDP using USB cable. (Refer to Fig. 2-3 in Chart 2-2) Login to the LCT with User name “User”. Click on “Metering” button in “LCT MENU”. ----Metering--TX Power [dBm] RX Level [dBm] TRP Power Supply [V] BER No.1 +0.7 -65.2 -45 1.0E-10 No.2 -70.0 -45 Calculating Notes: 1. If an abnormal indication appears, check Alarm/ Status, performance monitor and perform loopback test to distinguish sections of normal and alarmed. 2. RX LEV varies depending on received RF signal level. 3. Power Supply voltage at TRP/ALL INDOOR TRP varies depending on IF cable length between the MDP and TRP/ALL INDOOR TRP. 4. During total number of erroneous bits and total number of correctly received bits are calculating, “Calculating” is displayed. 5. 1.0E-10 is indicted equal to 1 x 10-10. 4-1 ROUTINE MAINTENANCE ROI-S07046 4.2 Performance Monitoring Chart 4-2 Performance Monitoring Step Procedure LCT MENU For the LCT operation, refer to Chapter 6 of LCT Operation in Appendix of this Section IV. Alarm/Status Equipment Setup Inventory AUX I/O Maintenance Provisioning Metering PMON (History) PMON (History) RX Level (24h/15min) RX Level (7days/day) Total (24h/15min) Total (7days/day) CSU (24h/15min) CSU (7days/day) RMON (Line) (24h/15min) RMON (Line) (7days/day) RMON (DMR) (24h/15min) RMON (DMR) (7days/day) ---RX Level (15min)--Date 2009/01/05 2009/01/05 2009/01/05 2009/01/05 2009/01/05 2009/01/05 2009/01/05 Time 15:30-15:45 15:45-16:00 16:00-16:15 16:15-16:30 16:30-16:45 16:45-17:00 17:00-17:15 Connect the PC to the MDP using USB cable. (Refer to Fig. 2-3 in Chart 2-2) Login to the LCT with User name “User”. Click on “PMON (History)” in “LCT MENU”. Click on “RX level (24h/15min)” sub-menu button in “PMON (History)”. : Maintenance Mode On Status MIN(No.1) -59.7 -59.8 -59.5 -59.5 -59.5 -74.2 -59.5 : Current Time MAX(No.1) -58.6 -58.7 -59.0 -59.0 -59.0 -55.8 -57.9 MIN(No.2) -59.3 -58.7 -58.7 -58.7 -71.2 -58.8 -58.8 MAX(No.2) -58.1 -58.2 -58.2 -58.2 -58.2 -54.1 -58.1 Detailed 24 hours 15min RX Level performance monitor data are displayed. 4-2 ROUTINE MAINTENANCE ROI-S07046 Chart 4-2 (Cont’d) Step ---RX Level (1day)--Date 2009/01/01 2009/01/02 2009/01/03 2009/01/04 2009/01/05 2009/01/06 2009/01/07 Procedure Click on “RX level (7days/day)” sub-menu button in “PMON (History)”. : Maintenance Mode On Status MIN(No.1) -59.7 -59.8 -59.5 -59.5 -59.5 -74.2 -59.5 MAX(No.1) -58.6 -58.7 -59.0 -59.0 -59.0 -55.8 -57.9 MIN(No.2) -59.3 -58.7 -58.7 -58.7 -71.2 -58.8 -58.8 MAX(No.2) -58.1 -58.2 -58.2 -58.2 -58.2 -54.1 -58.1 Detailed 7days daily RX Level performance monitor data are displayed. ---Total (15min)---Date 2009/01/05 2009/01/05 2009/01/05 2009/01/05 2009/01/05 2009/01/05 2009/01/05 Time 15:30-15:45 15:45-16:00 16:00-16:15 16:15-16:30 16:30-16:45 16:45-17:00 17:00-17:15 Click on “Total (24h/15min)” sub-menu button in “PMON (History)”. : Maintenance Mode On Status OFS : Current Time SEP BBE ES SES UAS Detailed 24 hours 15min Total performance data are displayed. Click on “Total (7days/day)” sub-menu button in “PMON (History)”. 4-3 ROUTINE MAINTENANCE ROI-S07046 Chart 4-2 (Cont’d) Step ---Total (1day)--- Procedure : Maintenance Mode On Date 2009/01/01 2009/01/02 2009/01/03 2009/01/04 2009/01/05 2009/01/06 2009/01/07 Status OFS SEP BBE ES SES UAS Detailed 7days daily total performance monitor data are displayed. ---CSU (15min)---Date 2009/01/05 2009/01/05 2009/01/05 2009/01/05 2009/01/05 2009/01/05 2009/01/05 Click on “RMON (Line) (24h/15min)” sub-menu button in “PMON (History)”. Click on “CSU (24h/15min)” sub-menu button in “PMON (History)”. : Maintenance Mode On TIme 15:30-15:45 15:45-16:00 16:00-16:15 16:15-16:30 16:30-16:45 16:45-17:00 17:00-17:15 Incoming CV-L Status Count Incoming CV-P Status Count : Current Time Outgoing CV-P Status Count Detailed 24 hours 15 min Total performance data are displayed. 4-4 ROUTINE MAINTENANCE ROI-S07046 Chart 4-2 (Cont’d) Step Procedure 10 ---CSU (1day)---Date Click on “CSU (7days/day)” sub-menu button in “PMON (History)”. : Maintenance Mode On TIme 2009/01/01 2009/01/02 2009/01/03 2009/01/04 2009/01/05 2009/01/06 2009/01/07 Incoming CV-L Status Count : Current Time Incoming CV-P Status Count Outgoing CV-P Status Count Detailed 7days daily total performance monitor data are displayed. 11 ---RMON (Line) (15min)--- Click on “RMON (Line) (24h/15min)” sub-menu button in “PMON (History)”. : Maintenance Mode On : Current Time Port1 Date 2009/01/05 2009/01/05 2009/01/05 2009/01/05 2009/01/05 2009/01/05 2009/01/05 2009/01/05 2009/01/05 2009/01/05 2009/01/05 2009/01/05 2009/01/05 2009/01/05 2009/01/05 2009/01/05 2009/01/05 2009/01/05 2009/01/05 2009/01/05 2009/01/05 Time 00:00-00:15 00:15-00:30 00:30-00:45 00:45-01:00 01:00-01:15 01:15-01:30 01:30-01:45 01:45-02:00 02:00-02:15 02:15-02:30 02:30-02:45 02:45-03:00 03:00-03:15 03:15-03:30 03:30-03:45 03:45-04:00 04:00-04:15 04:15-04:30 04:30-04:45 04:45-05:00 05:00-05:15 Status 1: 2: 3: 4: 5: 6: 7: 8: 9: 10: 11: 12: 13: 14: 15: 16: 17: 18: 19: 20: 21: 22: RX Unicast PKTS RX Broadcast PKTS RX Multicast PKTS RX Pause PKTS RX CRC Errors RX Align Errors RX Symbol Errors RX Undersize PKTS RX Fragments RX PKTS 64 RX PKTS 65-127 RX PKTS 128-255 RX PKTS 256-511 RX PKTS 512-1023 RX PKTS 1024-1536 RX PKTS 1537-MAX RX Jabbers TX Unicast PKTS TX Broadcast PKTS TX Multicast PKTS TX Pause PKTS TX Total Collisions 4-5 ROUTINE MAINTENANCE ROI-S07046 Chart 4-2 (Cont’d) Step Procedure Detailed 24 hours 15min Line (LAN) RMON (Remote Network Monitoring) data are displayed. 12 Click on “RMON (Line) (7days/day)” sub-menu button in “PMON (History)”. ---RMON (Line) (1day)--- Maintenance Mode On Port1 Date Time Status 1: 2: 3: 4: 5: 6: 7: 8: 9: 10: 11: 12: 13: 14: 15: 16: 17: 18: 19: 20: 21: 22: RX Unicast PKTS RX Broadcast PKTS RX Multicast PKTS RX Pause PKTS RX CRC Errors RX Align Errors RX Symbol Errors RX Undersize PKTS RX Fragments RX PKTS 64 RX PKTS 65-127 RX PKTS 128-255 RX PKTS 256-511 RX PKTS 512-1023 RX PKTS 1024-1536 RX PKTS 1537-MAX RX Jabbers TX Unicast PKTS TX Broadcast PKTS TX Multicast PKTS TX Pause PKTS TX Total Collisions Detailed daily Line (LAN) RMON (Remote Network Monitoring) data are displayed. 4-6 ROUTINE MAINTENANCE ROI-S07046 Chart 4-2 (Cont’d) Step Procedure 13 ---RMON(DMR)(15min)--- Click on “RMON (DMR) (24h/15min)” sub-menu button in “PMON (History)”. Maintenance Mode On : Current Time Port1 Date 2006/01/05 2006/01/05 2006/01/05 2006/01/05 2006/01/05 2006/01/05 2006/01/05 2006/01/05 2006/01/05 2006/01/05 2006/01/05 2006/01/05 2006/01/05 2006/01/05 2006/01/05 2006/01/05 Time 00:00-00:15 00:15-00:30 00:30-00:45 00:45-01:00 01:00-01:15 01:15-01:30 01:30-01:45 01:45-02:00 02:00-02:15 02:15-02:30 02:30-02:45 02:45-03:00 03:00-03:15 03:15-03:30 03:30-03:45 03:45-04:00 Status 1: 2: 3: 4: 5: 6: 7: 8: 9: 10: 11: 12: 13: 14: 15: 16: 17: 18: RX Unicast PKTS RX Broadcast PKTS RX Multicast PKTS RX Pause PKTS RX CRC Errors RX Fragments RX PKTS 64 RX PKTS 65-127 RX PKTS 128-255 RX PKTS 256-511 RX PKTS 512-1023 RX PKTS 1024-1536 RX PKTS 1537-MAX RX Jabbers TX Unicast PKTS TX Broadcast PKTS TX Multicast PKTS TX Pause PKTS Detailed 15 minutes DMR (LAN) RMON (Remote Network Monitoring) data are displayed. 4-7 ROUTINE MAINTENANCE ROI-S07046 Chart 4-2 (Cont’d) Step Procedure 14 Click on “RMON (DMR) (7days/day)” sub-menu button in “PMON (History)”. ---RMON(DMR)(1day)--- Maintenance Mode On Port1 Date Time Status 1: 2: 3: 4: 5: 6: 7: 8: 9: 10: 11: 12: 13: 14: 15: 16: 17: 18: RX Unicast PKTS RX Broadcast PKTS RX Multicast PKTS RX Pause PKTS RX CRC Errors RX Fragments RX PKTS 64 RX PKTS 65-127 RX PKTS 128-255 RX PKTS 256-511 RX PKTS 512-1023 RX PKTS 1024-1536 RX PKTS 1537-MAX RX Jabbers TX Unicast PKTS TX Broadcast PKTS TX Multicast PKTS TX Pause PKTS Detailed daily DMR (LAN) RMON (Remote Network Monitoring) data are displayed. 4-8 8 pages ROI-S07046 CORRECTIVE MAINTENANCE 5. CORRECTIVE MAINTENANCE Corrective maintenance done in the field is described in this chapter. Corrective maintenance in the field covers fault isolation, module/unit replacement and alignment. The fault location procedures describes how to isolate module-level/unit-level faults. Faults can be classified into those that cause deterioration of the transmission quality and those that interrupt the traffic due to a malfunction of the equipment. This chapter explains the troubleshooting procedures for equipment faults and the corresponding remedial methods. The purpose of troubleshooting malfunctioning equipment is to restart the service by locating the faulty part and replacing it with a spare. The faults that cause deterioration in the transmission quality are primarily originated by changes occurred in the state of propagation. Therefore, if a decline in the transmission quality or similar fault takes place frequently, the link design will have to be reviewed. During the corrective maintenance, carefully observe the precautions given in Chapter 2, until the alignment is completed. 5.1 Alarm/Status When an alarm event has occurred, At first, check alarm indication on the front of the MDP. Continuously, connect the PC to the LCT jack on the MDP and check alarm/status indication, Meter Reading on the LCT. (a) Check of the ALM LED Indications and LCT Indication A faulty part can be located by checking the ALM LED indicators and LCT Alarm indications. For the explanation of the ALM LED indication, refer to Chapter 2 OPERATING EQUIPMENT in Section II. Also refer to Chapter 2 Alarm/Status in this Section IV APPENDIX LCT OPERATION. (b) Meter Readings Based on the meter readings during periodical inspection with LCT described in Chapter 4, a faulty part can be located by checking if the reading values exceed the permissible ranges. (c) Loopback In the case of an abnormal BER measurement result among the meter reading items, try to distinguish the faulty part by Chart 5.1.3 Loopback. 5-1 CORRECTIVE MAINTENANCE ROI-S07046 5.1.1 Alarm and Status The alarm and status of each module and TRP/ALL INDOOR TRP are displayed. Each items is explained below. TRP/ALL INDOOR TRP TX Power: Indicates the status of the transmitter in the TRP/ ALL INDOOR TRP. When the transmission level is decreased 3 dB or more from preset ATPC minimum level, “Alarm” is issued. TX Input: Indicates the status of the TRP/ALL INDOOR TRP input signal from MDP. When the input signal from the MDP is lost, “Alarm” is issued. RX Level: Indicates the status of the received RF signal level of the TRP/ALL INDOOR TRP. When the level decreased below the RX threshold level, “Alarm” is issued. APC: Indicates the status of the synthesizer in the TRP/ ALL INDOOR TRP. When any abnormality occurs in the synthesizer, “Alarm” is issued. TRP CPU/Cable Open: Indicates the status of the CPU in the TRP/ALL INDOOR TRP or IF cable, When any abnormality occurs the CPU operation or IF cable is open, “Alarm” issued. Mute Status: Indicates the control status of the TRP/ALL INDOOR TRP TX power output. When the TX power is set to Mute, “On” is issued. TX SW Lock in Status: Indicates the status of “TX SW Lock in Status”. TX SW Reverse REQ: Indicates the detection of transmitting Reverse Function. TX SW Status (for 1+1 configuration): Indicates the TX SW status for the No. 1 or No. 2 CH selection. RX SW Status (for 1+1 configuration): Indicates the RX SW status for the No. 1 or No. 2 CH selection. 5-2 CORRECTIVE MAINTENANCE ROI-S07046 MODEM Unequipped: Indicates the status of the MODEM existence. When the MODEM is loose contact or it is not mounted according to the “Equipment Setup”, “Alarm” is issued. Type Mismatch: Indicates installed MODEM type status. When the MODEM that is not used for NLite N is installed in the NLite N MDP, “Alarm” is issued. Module: Indicates the status of the modulator-demodulator. When a failure occurred in the modulatordemodulator and as a result of a LSI failure, “Alarm” is issued. LOF: Indicates the frame synchronization status. When the synchronization from DMR is lost, “Alarm” is issued. Frame ID: Indicates the status of ID number against MODEM of opposite station or the other channel in Twinpath configuration. When ID number assignment is improper, “Alarm” is issued. High BER: Indicates the quality severe deterioration status between radio sections. When the signal deteriorates below the threshold preset value, “Alarm” is issued. The settable threshold values are: 1E-3, 1E-4 and 1E-5. Low BER: Indicates the quality unsevere deterioration status between radio sections. When the signal deteriorates below the preset threshold value, “Alarm” is issued. The settable threshold values are: 1E-6, 1E-7, 1E-8 and 1E-9. Early Warning: Indicates quality deterioration status. When the signal deteriorates below the preset threshold level, “Alarm” is issued. (When the Early Warning is used for protection switchover in 1+1 configuration, RX Hitless Switch is operated.) The preset threshold level is less than 1E-9. MOD: Indicates the operating status of the MOD. When any failure occurs in the modulator section, “Alarm” is issued. 5-3 CORRECTIVE MAINTENANCE ROI-S07046 DEM: Indicates the operating status of the DEM. When any failure occurs in the demodulator section, “Alarm” is issued. Input Voltage: Indicates the power supply input voltage status. When power supply is exceeding the limited, “Alarm” is issued. Power Supply: Indicates the operating status of the power supply. When power supply is abnormal, “Alarm” is issued. IF Cable Short: Indicates the status of IF cable between MDP and TRP/ALL INDOOR TRP. When a short circuit is caused between TRP/ALL INDOOR TRP and the MDP, “Alarm” is issued. Cable EQL: Indicates the status of IF cable equalizer. When equalizer characteristics control is lost, “Alarm” is issued. Linearizer Function: Indicates the status of linearizer function. OPR: When the linearizer function is used. NO OPR:When the linearizer function is not used. In this case, TX output power decreases approx. 4 dBm from a standard value. N/A: Linearizer: When the TRP/ALL INDOOR TRP is used without linearizer function. Indicates the linearizer operating status. When linlearizer operation is improper in OPR condition, “Alarm” is issued. ATPC Power Mode: Indicates the status of ATPC operation mode. When the ATPC function is improper, stop the control and maintain the TX output level at HOLD/MAX/MIN selectable. 5-4 CORRECTIVE MAINTENANCE ROI-S07046 INTFC Unequipped: Indicates the existence status of the ( ) INTFC. When the ( ) INTFC is not equipped, “Alarm” is issued. Type Mismatch: Indicates the mounted status of the ( ) INTFC. When the INTFC type is not coincided with the inventory list, “Alarm” is issued. Module: Indicates the operating status of the ( ) INTFC. When any failure occurs in the INTFC Module, “Alarm” is issued. Input LOS CH: Indicates the input status of the input DS1 signal from MUX. When the input is disconnected, “Alarm” is issued. AIS Received CH: Indicates the DS1 signal transmitting status. When AIS is received from MUX, “Alarm” is issued. AIS Generated CH: Indicates the DS1 signal receiving status. When AIS is generated in the 2P LAN INTFC, the status is issued. Usage Error CH: Indicates the status for the DS1 WS signal input. When the input signal DS1 WS is applied to the input interface which is adjusted to “Not Used”, this alarm is issued. this indicates only when CH Usage Error Report has been selected. In-band NELB CH: Indicates the In-band NELB (Near End Loopback) status. In-band FELB CH: Indicates the DS1 In-band FELB (Far End Loopback) status. WS Input LOS: Indicates the operating status of the 2P LAN. When DS1 WS input signal is lost, “Alarm” is issued. 5-5 CORRECTIVE MAINTENANCE ROI-S07046 WS AIS Received: Indicates the DS1 WS signal transmitting status. When WS AIS is received in the 2P LAN INTFC, “Alarm” is issued. (The indication is available only when “Reported” is selected) WS AIS Generated: Indicates the DS1 WS signal receiving status. When WS AIS is generated in the 2P LAN INTFC, status is issued. (The indication is available only when “Reported” is selected) WS Usage Error: Indicates the status for the DS1 WS signal input. When the input signal DS1 WS is applied to the input interface which is adjusted to “Not Used”, this alarm is issued. this indicates only when CH Usage Error Report has been selected. LAN Link: Indicates the status of Link between related equipment and Port ( ). Indicates “Link” when the Port is linked with related equipment and indicates “Alarm” in other case. LAN Collision: Indicates the status of Collision in Half Duplex mode. In Full Duplex mode, “Normal” is always displayed. Indicates status when Port ( ) is in collision condition. Link Loss Forwarding: Indicates the operating status during the fault in opposite station or when the link of local Port ( ) LAN is disconnected by the fault of radio section. When any failure occurs in the MAIN INTFC, “Alarm” is also issued. Speed & Duplex: Indicates the operating mode of Port ( ). Inphase: Indicates the received signal DADE status between No. 1 and No. 2 at 2P LAN INTFC. When the received signal delay time is out of permissible range, Outphase alarm is issued. UAE UAE: 5-6 Indicates the UAS status. CORRECTIVE MAINTENANCE ROI-S07046 CTRL CTRL Module: Indicates the operating status of the CTRL. When any failure occurs in the CTRL Module, “Alarm” is issued. MMC: Indicates the MMC status. When the mounted MMC is detected, “On” is displayed. TCN-RX LEV TCN-RX LEV-15min: Indicates the RX Level threshold crossing (15min). TCN-RX LEV-1day: Indicates the RX Level threshold crossing (1day). TCN-15 min 1 day Total-15min: Indicates the total threshold crossing (15min). Total-1day: Indicates the total threshold crossing (1day). CSU-15min: Indicates the DS1 CSU PMON threshold crossing (15min). CSU-1day: Indicates the DS1 CSU PMON threshold crossing (1day). 5-7 CORRECTIVE MAINTENANCE ROI-S07046 5.1.2 Control Item Control items can be selected only under maintenance mode. As this “Control” is likely to cause disconnection of signal, take care during operation. Details of “Control” item is described as follows: TXSW Manual Control: Controls manual switchover of the TX SW at the transmitting side in the Hot standby (HS) configuration. RXSW Manual Control: Controls manual switchover of the RX SW in the 1+1 configuration. The switchover is carried out without traffic interruption when the DADE is Inphase. Adjustment of the delay time of No.1 and No.2 is automatically set. Caution: When the RX SW mode is set to “Forced” in provisioning, RX SW manual control can select either No. 1 or No. 2 RX route though one is alarmed. Then, take care switching to avoid traffic interruption. ATPC Manual Control (No.1/2): Used when it is required ATPC operation ON/OFF or the change of the transmitting power range in ATPC operation. TX Mute Control (No.1/2): Turns off the transmitter output. CW Control (No.1/2): Used for transmitting a unmodulated carrier wave (CW). Used to confirm the TX frequency stability. IF Loopback (No.1/2): Used for distinguish equipment failure to TRP or MDP. The input traffic signal from MUX is looped back at IF stage. When no abnormality is found in the signal after IF loopback, it is assumed that the TRP has a problem. Since the control is not interlocked with the RX SW, the RX SW control is needed to select CH which it is IF looped back in 1+1 configuration. 5-8 ROI-S07046 CORRECTIVE MAINTENANCE Main CH Loopback (Near End): Used for distinguish equipment failure to MUX equipment or radio equipment. The input signal from MUX is looped back to the MUX. When no abnormality is found in the signal with NEAR END loopback, it is assumed that the radio equipment (MDP or TRP) has a problem. Main CH Loopback (Far End): Used for distinguish equipment failure to MUX equipment or radio equipment. Signal is looped back at the MDP of the opposite station. When no abnormality is found in the signal through FAR END loopback, it is assumed that the local radio equipment (MDP or TRP) has no problem. LAN Device Reset (for LAN transmission only): Used for reset control to LAN interface Port 1 or Port 2. DADE Adjust: Sets the DADE for Hot Standby SD/Twinpath configuration. Selects to make INTFC status Inphase. Notes: 1. The DADE control applies in 1+1 configuration to adjust delay time for RX hitless switching when the INTFC status is indicated Outphase. 2. The DADE adjustment is needed in initial lineup or when the IF CABLE is replaced. It is not needed readjustment when the INTFC status is indicated Inphase. RF Sub Band Select (No.1/2): Used for changing the TRP sub band for radio link depending on the RF frequency assignment. RF Shift Frequency Setting (No.1/2): Set the RF Shift Frequency (number). Antenna Alignment Mode (No.1/2): The Antenna Alignment Mode is used for extending the dynamic range of the Digital Multimeter. In order to measure in high range of AGC V, it is mandatory required to set Antenna Alignment Mode to ON. If not it set to ON, the indicated AGC voltage is not guaranteed value. For the antenna orientation, set the TX power to the required level by MTPC mode at the opposite site. 5-9 CORRECTIVE MAINTENANCE ROI-S07046 5.1.3 Loopback When loopback condition is necessary, set the system to loopback condition. (see Chart 5-1) When there is an interruption of signals, use the PDH analyzers and isolate the faulty section by checking the traffic signal by loopback. Setup the test equipment according to the following diagrams. TRANSMITTING END MDP PDH ANALYZER PC PDH ANALYZER B/U CONV SPEED CONV (Near End Loopback) U/B CONV SPEED CONV 2P LAN INTFC MOD RECEIVING END TRP TRP TX RX (IF Loopback) DEM MODEM MDP DEM SPEED CONV U/B CONV (Far End Loopback) RX TX MOD MODEM SPEED CONV B/U CONV 2P LAN INTFC Fig. 5-1 Loopback Diagram for Fault Isolation for DS1 Note: The IF LOOPBACK and the RX SW is not operated interlock. In 1+1 configuration, The RX SW switching is needed to select the same CH that is testing in IF LOOPBACK. When the RX SW manual control is disable, set it to Forced mode in Provisioning. 5-10 CORRECTIVE MAINTENANCE ROI-S07046 Chart 5-1 Loopback Control Step Procedure For the LCT operation, refer to Chapter 6 of LCT Operation in Appendix of this Section IV. This chart contains: A. Preparation B. IF Loopback Control C. Main CH Loopback (Near End) Control D. Main CH Loopback (Far End) Control If loopback operation is performed, timing loop may occur (timing loop is described in ITU-T Recommendation G.781). Step Procedure Caution: The Loopback control affects the radio link connection. 1. Loopback control operation is not performed at the same time, or perform the Loopback reset control and perform either Loopback mode. • IF Loopback • Near End Loopback • Far End Loopback 2. Loopback operation is not performed with an opposite station simultaneously. 3. Far End Loopback control will be canceled when radio link failure occurs under the control has been executed. A. PREPARATION Set up the BER measurement. (refer to Fig. 5-4) Connect the LCT port and the USB port with a USB cable. (see Fig. 2-3 in Chart 2-2) Login LCT with User name “Admin” and Admin password. 5-11 CORRECTIVE MAINTENANCE ROI-S07046 Chart 5-1 (Cont’d) Step Procedure Click on the “Maintenance” button in “LCT MENU”. LCT MENU Alarm/Status Equipment Setup Inventory AUX I/O Maintenance Provisioning Metering PMON(History) Maintenance1 Maintenance2 Click on the “Maintenance1” menu. Click on the control button “On” and click “Set” button, to set to Maintenance On mode. For 1+1 configuration, switchover the TX SW and RX SW for the channel is to be set loopback. (Refer to Chart 2-3 Manual Switchover Operation (only 1+1 Configuration)) Click on the “IF Loopback ( )” button in “Maintenance1” menu and click on the setting button “On”. Note: The control affects Radio link connection. ---Maintenance1--Item Maintenance Value On IF Loopback (No.1) On IF Loopback (No.2) Off Setting Off On Set Off Off On On Set Set Note: The control applies to IF loopback in local MODEM. 5-12 Click on the “Set” button. 10 Click on the Alarm/Status on LCT MENU to check the status. 11 Refer to Fig. 5-5 to Fig. 5-9 Troubleshooting Flowchart to diagnose the problem. 12 Click on the setting button “Off” of the IF Loopback ( ) and click on the “Set” button. CORRECTIVE MAINTENANCE ROI-S07046 Chart 5-1 (Cont’d) Step Procedure For 2P LAN 13 Click on the “Select” button and click on the setting button “On” of the required CH#(s) to be loop back and click on the “SET” button, For all DS1 channel loop back, click on the “Select” button “On” in All Setting menu and click on the “SET” button, ---Maintenance1--Item Maintenance Value On Main CH Loopback (Near End) Main CH Loopback (Far End) Off Off Setting Off On Set Select Select Note: The control applies to loopback in each DS1 signal. ---Main CH Loopback (Near End)--CH1-16 CH1 On CH2 Off CH3 Disable CH4 CH5 Off Off Off Off On On Off Off Off On On On Off Off On On CH15 CH16 Off Off All Setting Off On Select SET Close Note: The Control is available for DS1 channels set to used. 5-13 CORRECTIVE MAINTENANCE ROI-S07046 Chart 5-1 (Cont’d) Step Procedure ---Main CH Loopback (Far End)--CH1-16 CH1 On CH2 Off CH3 Disable CH4 CH5 Off Off Off Off On On Off Off Off On On On Off Off On On CH15 CH16 Off Off All Setting Off On Select SET Note: 5-14 Close The Control is available for DS1 channels set to used. CORRECTIVE MAINTENANCE ROI-S07046 5.1.4 In-band Loopback To perform In-band loopback set In-band loopback to the equipment. (see Chart 5-1) When set “code/message” is sent per DS1 channel basis, In-band loopback is executed. Settable In-band loopback functions for each kind of DS1 Frame Format are shown in Table 5-1. Table 5-1 Settable In-band Loopback functions In-band Near End Loopback Code/ Messages In-band Far End Loopback DS1 Frame Format Unframed SF ESF Unframed SF ESF Code Messages : Available Fig. 5-2 indicates the location where the in-band near end loop back and in-band far end loopback is applied. TRANSMITTING END MDP PDH ANALYZER B/U CONV PC PDH ANALYZER SPEED CONV MOD RECEIVING END TRP TRP TX RX MDP DEM SPEED CONV In-band Near End Loopback U/B CONV SPEED CONV 2P LAN INTFC U/B CONV In -band Far End Loopback DEM MODEM RX TX MOD MODEM SPEED CONV B/U CONV 2P LAN INTFC Fig. 5-2 Loopback Diagram for Fault Isolation By using in-band loopback code/message function, traffic failure section can be identified. 5-15 CORRECTIVE MAINTENANCE ROI-S07046 Fig. 5-3 shows a three hop N lite N linear network. In-band NE loopback is applied at MDP in station (equipment) #1 and in-band far end loop back is applied at MDP in station (equipment) #6. In-band Near End Loopback End User Terminal TRP #1 MDP TRP TRP #2 MDP TRP #3 MDP TRP #4 MDP #5 MDP NLite N Network Fig. 5-3 Loopback Diagram for Fault Isolation 5-16 TRP #6 MDP In -band Far End Loopback End User Terminal CORRECTIVE MAINTENANCE ROI-S07046 Chart 5-2 In-band Loopback Control Step Procedure For the LCT operation, refer to Chapter 7 of LCT Operation in Appendix of this Section IV. This chart contains: A. Preparation B. Near End In-band Loopback Code Setting C. Near End In-band Loopback Messages Setting D. Far End In-band Loopback Messages Setting Step Procedure A. PREPERATION Set up the BER measurement. (refer to Fig. 5-4) Connect the LCT port and the USB port with a USB cable. (see Fig. 2-3 in Chart 2-2) Login LCT with User name “Admin” and Admin password. Click on the “Provisioning” button in “LCT MENU”. LCT MENU Alarm/Status Equipment Setup Inventory AUX I/O Maintenance Provisioning Metering PMON(History) DS1 Setting WS Setting BER Threshold Setting SC Assignment LAN Port Setting TX Power Control Condition for TX/RX SW Relay Setting TCN Threshold (15min) TCN Threshold (1day) PMON Select In-band Loopback Setting Others 5-17 CORRECTIVE MAINTENANCE ROI-S07046 Chart 5-2 (Cont’d) Step Procedure Click on the “In-band Loopback Setting” menu. ---In-band Loopback setting--CH** ---Near End--Item Mode Value Disable Activation Code Deactivation Code Activation Messages Deactivation Messages Setting Disable 11111111 0??????0 11111111 0??????0 << Direction of Transmission ---Far End--Item Mode Value Disable Activation Messages Deactivation Messages Setting Disable 11111111 0??????0 11111111 0??????0 << Direction of Transmission B. Near End In-band Loopback Code Setting Select the near end loop-back mode to “Enable (code)” from the drop down list. To Set the activation code, select the number of bits in the code and enter its value. (Example: 5bit, 00001) To set the deactivation code, select the number of bits in the code and enter its value. (Example 3bit, 001) Click on the “set” button. Note: Can not set duplicated values for activation code and deactivation code. Example Activation code is “6 bit, 001001” and deactivation code is “3 bit, 001”. Note: Activation code value cannot be set to all “0” or all “1”. Deactivation code value cannot be set to all “0”. 5-18 CORRECTIVE MAINTENANCE ROI-S07046 Chart 5-2 (Cont’d) Step Procedure ---In-band Loopback setting--CH** ---Near End--Item Mode Value Disable Setting Enable (Code) Activation Code Deactivation Code Activation Messages Deactivation Messages 00001 001 5 bit 00001 3 bit 001 11111111 0??????0 11111111 0??????0 << Direction of Transmission C. Near End In-band Loop back Message Setting 10 Select the near end loop back “mode” to “Enable (Messages)” from the drop down list. 11 To set the Activation Message, enter the 6 bit value to be inserted in the place of “?” in the 16 bit Activation Message. Example: “111000” 12 To set the Deactivation Message, enter the 6 bit value to be inserted in the place of “?” in the 16 bit Activation Message. Example: “001110” 13 Click the “Set” button Note: Cannot enter the same value for Activation Message and Deactivation Message. Note: Value of Activation Message and Deactivation Message cannot be all “0” or all “1”. 5-19 CORRECTIVE MAINTENANCE ROI-S07046 Chart 5-2 (Cont’d) Step Procedure ---In-band Loopback setting--CH** ---Near End--Item Mode Value Disable Setting Enable (Code) Activation Code Deactivation Code Activation Messages Deactivation Messages 11111111 01110000 11111111 00011100 11111111 0??????0 11111111 0??????0 111000 001110 << Direction of Transmission D: Far End In-band Loop back Message Setting 14 Select the Far end loop back “mode” to “Enable (Messages)” from the drop down list. 15 To set the Activation Message, enter the 6 bit value to be inserted in the place of “?” in the 16bit Activation Message. Example: “000010” 16 To set the Deactivation Message, enter the 6 bit value to be inserted in the place of “?” in the 16 bit Activation Message. Example: “011100” 17 Click the “Set” button Note: Cannot enter the same value for Activation Message and Deactivation Message. Note: Value of Activation Message and Deactivation Message cannot be all “0” or all “1”. 5-20 CORRECTIVE MAINTENANCE ROI-S07046 Chart 5-2 (Cont’d) Step Procedure ---In-band Loopback setting--CH** ---Far End--Item Mode Value Disable Setting Enable (Code) Activation Messages Deactivation Messages 11111111 00000100 11111111 00111000 11111111 0??????0 11111111 0??????0 000010 011100 << Direction of Transmission 18 By sending the DS1 signal with the “Code/Messages”, loopback is applied/released at the specified in-band loopback locations. 19 To cancel the entered code/message, select the Near End/Far End in-band loopback to “Disable”. 5-21 CORRECTIVE MAINTENANCE ROI-S07046 5.1.5 BER Measurement Chart 5-3 BER Measurement Apparatus: Digital Multimeter with test leads Screwdriver Headset Step Procedure A. 2P LAN INTERFACE Note: Pin connector facilities are necessary to connect the PDH analyzer signal cable to MDR connector. Note: The BER measurement can not be performed for the channel which is set to Not Used or the channels shared with LAN. At the transmitting end, disconnect DS1 IN/OUT on the 2P LAN INTFC. (see Fig. 5-4) At the receiving end, disconnect DS1 IN/OUT on the 2P LAN INTFC. (see Fig. 5-4) TRANSMITTING END Connector facilities No.1 2P LAN INTFC ! IF IN/OUT Ns XIF IN XIF OUT XPIC CTRL TX RX XPIC RESET PWR TRP MD/ CBL SELV PDH ANALYZER DS1 IN/OUT PULL ALM PWR WS IN/OUT DS1 IN/OUT 100M PORT 1 PORT 2 100M ! IF IN/OUT Ns XIF IN XIF OUT XPIC CTRL TX RX XPIC RESET PWR TRP MD/ CBL SELV PROTECT PULL PWR LCT NMS NE Ns MAINT MEMORY MDP AUX/ALM SC IN/OUT EOW CALL MMC MDP No.2 RECEIVING END No.1 Connector facilities 2P LAN INTFC ! IF IN/OUT Ns XIF IN XIF OUT XPIC CTRL TX RX XPIC RESET PWR TRP MD/ CBL SELV XPIC CTRL TX RX XPIC RESET PWR TRP MD/ CBL SELV PDH ANALYZER DS1 IN/OUT PULL ALM PWR WS IN/OUT DS1 IN/OUT 100M PORT 1 PORT 2 ! IF IN/OUT Ns No.2 XIF IN XIF OUT PWR LCT NMS NE AUX/ALM MDP Fig. 5-4 BER Measurement (DS1) 5-22 Ns PROTECT PULL 100M MAINT MEMORY MDP SC IN/OUT EOW CALL MMC CORRECTIVE MAINTENANCE ROI-S07046 5.1.6 Trouble Shooting Flow When alarm condition occurs, red alarm LEDs on the MDP are lit except when there is a power supply failure. Faults can be distinguished using the LED indicators on the front panel of the MDP. Connect the LCT to the equipment and check the equipment conditions in according with the flow chart are shown in Fig. 5-5 to Fig. 5-9. Is TRP ALM indicator (red) on the MDP lighted? YES Is MDP ALM indicator (red) on the MDP lighted? NO Connect the LCT to the MDP and check ALARM/STATUS menu. Check every items whether indicated status is alarm or normal. YES Are both MDP and TRP ALM indicators (red) flashing? NO Is TX Input indicated normal? NO YES Check the IF cable connection and connectors whether the cable is open or short circuit. The IF cable type, cable length and cable loss are used standard. YES YES Change the IF cable to standard. Replace the TRP with a spare. Is TX power of the TRP is indicated normal? For XPIC NO Is LO REF indicated normal? YES YES NO Is APC of the TRP is indicated normal? NO Is XREF (MODEM) indicated normal? YES NO NO Is TRP CPU is indicated normal? YES NO Replace the TRP with a spare. YES Check the MDP section. Reset CPU of the TRP. NO Replace the TRP with a spare. Is TX power vary with ATPC manual control? Is TRP ALM is indicated normal? YES End NO YES Check the RX section of the TRP. Replace the TRP with a spare, if TX power alarm continues when temperature is improved. Replace the TRP with a spare. Fig. 5-5 TRP TX Section Troubleshooting Flowchart 5-23 CORRECTIVE MAINTENANCE ROI-S07046 Is TRP ALM indicator (red) on the MDP lighted? YES Is MDP ALM indicator (red) lighted? NO Connect the LCT to the MDP and check ALARM STATUS menu. Check every items whether indicated status is Alarm or Normal. YES Are both MDP and TRP ALM indicators (red) flashing? NO Is RX Level indicated Normal? YES Check the IF cable connection and connectors whether the cable is open or short circuit. YES Check the TRP TX section. Is APC of the TRP is indicated Normal? YES NO Reset CPU of the TRP Is TRP ALM is indicated Normal? YES NO NO For XPIC NO Is TRP CPU is indicated Normal? Is RXLEVEL by RSL monitor vary at random interval? YES Check fading or interference. YES Are frequency value at opposite site and local site correct? NO NO Is TRP TX section are checked? YES Set proper frequency. YES End Check the TX section of the TRP. Replace the TRP with a spare. Check Antenna system or Replace the TRP with a spare. Fig. 5-6 TRP RX Section Troubleshooting Flowchart 5-24 NO CORRECTIVE MAINTENANCE ROI-S07046 Is MDP ALM indicator (red) on the MDP lighted? YES Is TRP ALM indicator (red) on the MDP lighted? Connect the LCT to the MDP and check ALARM STATUS menu. Check every items whether indicated status is Alarm or Normal. NO YES Is PWR LED on the MODEM lit? Is AIS Generated indicated Normal? NO Check associated DTE at opposite site. YES YES Replace Fuse in the MODEM. Is IF Cable indicated Short? NO Is AIS or Line AIS Received indicated Normal? YES YES Are both MDP and TRP ALM indicators (red) flashing? NO Is CH Usage indicated Normal? YES Is MDP indicated Normal? Is MOD/DEM indicated Normal? NO YES NO YES YES NO Set CH usage correct. Is status of LAN INTFC indicated Normal? YES Select IF Loopback from Maintenance1 menu in the Maintenance Menu on the LCT. NO Check associated DTE at local site. YES Check the IF cable connection and connectors whether the cable is open or short circuit. NO Is MOD indicated Normal? NO Perform LAN device reset and check LAN cable or associated external equipment. NO Is MOD/DEM indicated Normal? NO Replace the MODEM with a spare. For XPIC YES Is Output LOS indicated Normal? YES NO Is Input LOS indicated Normal? NO Is XREF indicated normal? NO Is XIF indicated normal? YES Connect the SONET/STM/PDH Analyzer for BER measurement. NO YES Check associated DTE and cable connection. Select Far End loopback from Control menu in the Maintenance Menu on the LCT. Display ALARM/STATUS items from main menu on the LCT again. Is Output LOS indicated Normal? YES Replace the MODEM with a spare. Check the XIFcable, MDP and TRP of the opposite pol. CH or setting of the opposite station. NO ( ) INTFC faulty. Replace the ( ) INTFC YES Check associated DTE and cable connection at opposite site. Fig. 5-7 MDP Section Troubleshooting Flowchart 5-25 CORRECTIVE MAINTENANCE ROI-S07046 Is TRP ALM indicator (red) on the MDP lighted? YES Is MDP ALM indicator (red) on the MDP lighted? NO Connect the LCT to the MDP and check ALARM/STATUS menu. Check every items whether indicated status is alarm or normal. YES Are both MDP and TRP ALM indicators (red) flashing? NO Is TX Input indicated normal? NO YES Check the IF cable connection and connectors whether the cable is open or short circuit. The IF cable type, cable length and cable loss are used standard. YES YES Change the IF cable to standard. Is power source voltage of the TR UNIT normal? Is TX power of the TRP indicated normal? NO NO Supply the normal voltage for the power source. Is APC of the TRP is indicated normal? YES NO Is TRP CPU is indicated normal? YES Reset CPU of the TRP. Change the TR UNIT. Is TRP ALM is indicated normal? YES End Check the RX section of the TRP. Change the TR UNIT. Fig. 5-8 ALL INDOOR TRP TX Section Troubleshooting Flowchart 5-26 NO YES YES NO NO CORRECTIVE MAINTENANCE ROI-S07046 Is TRP ALM indicator (red) on the MDP lighted? YES Is MDP ALM indicator (red) lighted? NO Connect the LCT to the MDP and check ALARM STATUS menu. Check every items whether indicated status is Alarm or Normal. YES Are both MDP and TRP ALM indicators (red) flashing? NO Is RX Level indicated Normal? YES Check the IF cable connection and connectors whether the cable is open or short circuit. NO YES Is APC of the TRP is indicated Normal? NO Check the cable connection between TR UNIT and BR CKT of the opposite station's transmitter. NO YES Reset CPU of the TRP YES YES Check fading or interference. Are frequency value at opposite site and local site correct? NO YES NO Set proper frequency. NO Is TRP TX section are checked? YES End YES Is TRP CPU is indicated Normal? NO Is TRP ALM is indicated Normal? Is RXLEVEL by RSL monitor vary at random interval? Check the TX section of the TRP. Change the TR UNIT. Is the cable between TR UNIT and BR CKT connected correctly? YES NO Connect the cable correctly. Check the antenna or change the TR UNIT. Fig. 5-9 ALL INDOOR TRP RX Section Troubleshooting Flowchart 5-27 CORRECTIVE MAINTENANCE ROI-S07046 5.2 Replacement The replacement procedures of the MDP and TRP is described below. 5.2.1 TRP Replacement The procedures for replacing the TRP with a spare are given in the Chart 5-4. The label attached to the side of TRP indicates the TRP type (see Fig. 5-10). To replace the TRP, prepare another TRP of the same type as indicated on the label of the failed one. Check the name plate of the spare TRP. When the indicated items are coincided, the TRP can be replaced. Caution: Do not remove/connect the IF cable with the MDP power ON. Turn the MDP power OFF before connecting/ disconnecting the IF cable, or equipment may be damaged. Caution: To avoid microfonic properties, occurrence of bit errors, when installing the TRP on the HYB or OMT, protect the TRP from mechanical knocks which is not be replaced. 6-38 GHz NHG Type 6-38 GHz TRP Fig. 5-10 TRP Type and Frequency Indication Label Note: Before replacing the TRP in XPIC, perform the control of XPIC Local and XPIC Remote Reset by the LCT for Main Master or Sub Master channel that is to be used online. The mounting and demounting the TRP from/to antenna, refer to the Installation and Initial Line up in Section III. 5-28 CORRECTIVE MAINTENANCE ROI-S07046 Chart 5-4 TRP Replacement Apparatus: T type hexagonal driver Step Procedure REMOVING For 1+1 configuration, switchover the TX SW and RX SW for the standby channel is to be replaced. Turn off the power switch on the MODEM which is connected to the TRP is to be replaced. Remove the self-bonding tape from the IF IN/OUT connector. Disconnect the IF cable from the IF IN/OUT connector on the TRP. Disconnect ground cable from the FG terminal on the TRP. Loosen four bolts fixed the TRP with a T type hexagonal driver. Note: Being careful, loosen alternately and gradually four screws. SCREWS GROUND CABLE IF CABLE SCREWS TRP Remove the TRP from the bracket. 5-29 CORRECTIVE MAINTENANCE ROI-S07046 Chart 5-4 TRP Replacement (Cont’d) Step Procedure MOUNTING When the TRP is used for vertical polarization, rotate the TRP so that the plate marked V is on top. Note: Remove the protection metallic plate covering the waveguide hole on TRP. When the TRP is used for horizontal polarization, remove the guide pin fixed on the plate marked V. PLATE MARKED V Guide Pin UP V POLARIZATION TRP 5-30 10 Insert the guide pin removed in step 8 behind of the plate marked H. 11 Rotate the TRP so that the plate marked H is on top. CORRECTIVE MAINTENANCE ROI-S07046 Chart 5-4 TRP Replacement (Cont’d) Step Procedure PLATE MARKED H Guide Pin UP H POLARIZATION TRP 12 Fit the spare TRP onto the bracket. Notes: 1. Be careful not to damage the flange and O-ring. 2. Being careful, tighten alternately and gradually four screws. 13 Mount the spare TRP onto the bracket and tighten the four screws on the TRP. 14 Reconnect the IF cable to the IF IN/OUT connector on the TRP. 15 Wrap twice the IF IN/OUT connector with self-bonding tape for waterproofing. (see Fig. 5-11 (1/2) and (2/2)) 16 Reconnect ground cable removed in step 4 to FG terminal. 17 Turn on the power switch on the MDP. 5-31 CORRECTIVE MAINTENANCE ROI-S07046 ANT POLE (*) ANT POLE TRP HYB 6 GHz BAND TRP (*) TRP Wrap twice the IF IN/OUT connector with self-bonding tape for waterproofing. 6 GHz BAND self-bonding tape stretch Note: *: These parts should be wrapped by selfbonding tape for waterproof. TRP twice Fig. 5-11 Location of Connector for Waterproof (1/2) 5-32 a half of tape width CORRECTIVE MAINTENANCE ROI-S07046 TRP 18/23/38 GHz CONNECTOR TRP 6GHz CONNECTOR This part should be wrapped by self-bonding tape for waterproof. Wrap twice the IF IN/OUT connector with self-bonding tape for waterproofing. SELF-BONDING TAPE self-bonding tape TRP IF CABLE TRP IN CASE OF L−ANGLE stretch SELF-BONDING TAPE TRP twice a half of tape width IF CABLE Note: The self-bonding tape should be prepared by customer. Fig. 5-11 Location of Connector for Waterproof (2/2) 5-33 CORRECTIVE MAINTENANCE ROI-S07046 5.2.2 MDP and Module Replacement The procedures for replacing MDP/module with a spare are given in the Chart 5-5. Chart 5-5 MDP and Module Replacement Caution: Persons performing maintenance must take necessary steps to avoid electro-static discharge which may damage the modules or cause error. Wear a conductive wrist strap connected to the grounded (G) jack on the front of the equipment shelf. This will minimize static build-up during maintenance. (see Fig. 2-1 in Chapter 2). Caution: Do not remove/connect the IF cable with the MDP power ON. Turn the MDP power OFF before connecting/ disconnecting the IF cable, or equipment may be damaged. This chart contains: A. Module replacement B. MDP replacement Apparatus: Suitable Screwdriver Step Procedure A. MODULE REPLACEMENT Notes: 1. Be careful do not touch the electric parts and printed circuit on the module. 2. The top surface of the MDP above MODEM is hot in operation. 3. The maintenance personnel should report replacement from a station to the relevant station. 5-34 starting Referring to Chart 2-2, set the MDP to maintenance ON condition by LCT. For 1+1 configuration, switchover the TX SW and RX SW for the standby channel from the working channel which is to be replaced. CORRECTIVE MAINTENANCE ROI-S07046 Chart 5-5 MDP and Module Replacement (Cont’d) Step Procedure Removing MODEM When the MODEM will be replaced, turn off the power switch on the corresponding MODEM which is to be replaced. Disconnect cables as following order. (1) Disconnect power supply cable from SELV connector. (2) Disconnect IF cable from IF IN/OUT connector. The adapter is reused. (3) Disconnect ground cable from the ground terminal. Loosen two screws on the MODEM module. (See Fig. 5-12) Remove the MODEM module from the MDP shelf. Mounting MODEM When the MODEM is replaced, check that the power switch is set to Off position. Align the MODEM to the shelf, then push it in until the multipin connector firmly fits. Tighten the two screws on the module. Connect cables as following order. (1) Connect ground cable to the ground terminal. (2) Connect IF cable with adapter to IF IN/OUT connector. (3) Connect power supply cable to SELV connector. Turn on the power switch on the MODEM. Check that the MODEM is normal on the Alarm/Status display. Check that the installed MODEM module exists in the INVENTRY list. Check the operation of the replaced MODEM module. Referring to Chart 2-2, set the MDP to maintenance OFF condition by LCT. 5-35 CORRECTIVE MAINTENANCE ROI-S07046 Chart 5-5 MDP and Module Replacement (Cont’d) Step Procedure Removing 2P LAN INTFC, CTRL Referring to Chart 2-2, set the MDP to maintenance ON condition by LCT. Notes: 1. When the CTRL is a failure, replace it with a spare as explained below. 2. When the CTRL is replaced without power OFF, refer to the “Replacing the CTRL Used MMC or LCT”. ---Maintenance1--Item Maintenance Value On Setting Off On Set Turn off the power switch on the MODEM (both MODEM for 1+1 configuration). Disconnect all the cables connected to the module. Loosen two screws on the module. (See Fig. 5-12) Extract the module. Note: Be careful not catch the module on the cable when extracting the module. If the module caught on the live cables, it may be caused radio link error. 5-36 This work finishes. CORRECTIVE MAINTENANCE ROI-S07046 1+0 SYSTEM MDP SCREW SCREW 2P LAN INTFC MODEM ! IF IN/OUT Ns XIF IN XIF OUT XPIC CTRL TX RX XPIC RESET PWR TRP MD/ CBL SELV G PULL ALM PWR WS IN/OUT DS1 IN/OUT 100M PORT 1 PORT 2 PROTECT MAINT MEMORY MDP (Blank) LCT NMS NE CTRL Ns 100M AUX/ALM SC IN/OUT EOW CALL MMC PORT 1 PORT 2 SCREW SCREW 1+1 SYSTEM MDP 2P LAN INTFC MODEM No. 1 ! IF IN/OUT Ns XIF IN XIF OUT XPIC CTRL TX RX XPIC RESET PWR TRP MD/ CBL SELV XPIC CTRL TX RX XPIC RESET PWR TRP MD/ CBL SELV PULL PULL ALM PWR WS IN/OUT DS1 IN/OUT 100M ! IF IN/OUT Ns XIF IN XIF OUT PWR LCT NMS NE AUX/ALM 100M Ns PROTECT MAINT MEMORY MDP SC IN/OUT EOW CALL MMC CTRL MODEM No. 2 SCREW Fig. 5-12 Demounting and Remounting Module 5-37 CORRECTIVE MAINTENANCE ROI-S07046 Chart 5-5 MDP and Module Replacement (Cont’d) Step Procedure 2P LAN INTFC, CTRL Referring to Chart 2-2, set the MDP to maintenance ON condition by LCT. ---Maintenance1--Item Maintenance Value On Setting Off On Set Turn OFF the power switch on the MODEM. Check that the switch on the MODEM (both MODEM for 1+1 configuration) is off position. Align the module to the MDP shelf, then push it in until the multipin connector firmly fits. Tighten two screws on the module. Connect all cables to the module. Turn on the power switch on the MODEM. Check that the 2P LAN INTFC, CTRL is normal on the Alarm/ Status display. Check that the installed 2P LAN INTFC, CTRL module exists in the INVENTRY list. 10 Check the operation of the replaced 2P LAN INTFC, CTRL module. 11 Click on the “Off” button of Maintenance and click on the “Set” button. ---Maintenance1--Item Maintenance Value Off 12 5-38 Setting Off This work finishes. On Set CORRECTIVE MAINTENANCE ROI-S07046 Chart 5-5 MDP and Module Replacement (Cont’d) Step Procedure Replacing the CTRL Used the MMC or LCT. This procedure is explains how to replace the CTRL module (Card) using the MMC or LCT. This procedure is applies when the CTRL is not failure or when the equipment configuration data are saved into the MMC or LCT/PNMx. Note: The Firmware versions before ver. 3.4.5 do not copy the Network/ MIB configuration to the MMC card, only the equipment configuration. Therefore resetup of the Network/MIB configuration by PNMTj or downloading the Network/MIB configuration files by PNMTj/LCT is required. The Use of the MMC for the CTRL Replacement When the MMC is used, the replacement of the CTRL can be carried out without the LCT or PNMTj. Insert the MMC into the MMC slot on the CTRL front, (The data size to save is approximately 10 kbyte.) Set the PROTECT SW on the CTRL front to ON position (for upper side). Then, the MAINT LED (amber) on the MDP is lit and Equipment/Network/MIB configuration data gather up and saving of data to the MMC start. When Equipment/Network/MIB configuration data gather up and data saving to the MMC has been completed, the MAINT LED on the MDP blinks slowly. (Check that the MAINT LED blinks slowly before removing the CTRL.) Remove the cables connected to the CTRL, loosen two fixed screws and remove the CTRL. Note: Be careful not catch the module on the cables when extracting the module. If the module get caught on the live cables, it may cause radio link error. 5-39 CORRECTIVE MAINTENANCE ROI-S07046 Chart 5-5 MDP and Module Replacement (Cont’d) Step Procedure Prepare the spare CTRL. Set the PROTECT SW on the spare CTRL to ON position (for upper side), (The PROTECT SW setting distinguish the normal start up or protected start up.) Inset the MMC containing Equipment/Network/MIB configuration files of the removed CTRL, into the MMC slot in the front. CTRL PROTECT SW MAINTE LED PROTECT LCT NMS AUX/ALM NE MAINT MEMORY MDP SC IN/OUT EOW CALL MMC MMC Slot SCREW SCREW MMC 5-40 Mount the CTRL into the MDP. Check that the MAINT LED on the MDP blinks. Tighten two screws and connect cables removed in step 4. The download of the Equipment/Network/MIB configuration data start, the deployment is performed. When the CTRL has been made provision, MAINT LED on the MDP turns to light. Check that the MAINT LED lights and set the PROTECT SW to OFF position (for lower side.) Then, the Equipment/Network/ MIB configuration data deploys and data is restored. In the Equipment Setup menu and the Provisioning menu, confirm that the equipment configuration and setting conditions are the same as before replacement. Check that neither alarm is indicated in the Alarm Status. For Firmware version before 3.4.5, Network/MIB configuration will not be saved in the MMC. Perform resetup of Network/ MIB configuration using the PNMTj. CORRECTIVE MAINTENANCE ROI-S07046 Chart 5-5 MDP and Module Replacement (Cont’d) Step Procedure The Use of the LCT for the CTRL Replacement When the LCT is used, the replacement can be performed without the MMC. Referring to Chart 2-2, set the MDP to Maintenance ON condition by LCT (Check that the MAINT LED lights). Set the PROTECT SW on the CTRL front to ON position (for upper side). --- Maintenance2 -----Control--- ---PMON Clear--- CPU Reset PMON Clear ---Download--Configuration File Program File Equipment Config. File ---Upload--Configuration File Equipment Config. File ---Date/Time--Date/Time Setting ---Password--Password Setting Select the Maintenance 2 from the Maintenance menu. In the upload section select the Configuration File and click on the Network Config radio button, enter the file name and the directory where the file is to be saved. Click the Execute button to upload the file to the PC (same for MIB Config.) In the upload section select the Equipment Config. File of uploaded, enter the file name and the directory where the file is to be saved. Click the Execute button to upload the file to the PC. When the upload to the LCT has completed, MAINT LED blinks slowly (Check that the MAINT LED blinks slowly when remove the CTRL.). 5-41 CORRECTIVE MAINTENANCE ROI-S07046 Chart 5-5 MDP and Module Replacement (Cont’d) Step Procedure Remove the cables connected to the CTRL, loosen two fixed screws and remove the CTRL. Note: Be careful not catch the module on the cable when extracting the module. If the module caught on the live cables, it may be caused radio link error. 5-42 Prepare the spare CTRL. Set the PROTECT SW on the spare CTRL to ON position (for upper side), (The PROTECT SW setting distinguish the normal start up or protected start up). Mount the CTRL into the MDP. Check that the MAINT LED on the MDP blinks. Tighten two screws and connect cables removed. To download the Equipment configuration data from the LCT, select Maintenance 2 from the Maintenance menu. In the Down Load section select Equipment Configuration File and Browse to the location where the file is saved. Click the Execute button. When “Complete” status appear on the progress status, click the Update button to update the equipment configuration data of the CTRL. When the CTRL has been made provision, MAINT LED on the MDP turns to light. Check that the MAINT LED lights, set the PROTECT SW to OFF position (for lower side). Then, the equipment configuration data deploys and data is restored. In the Equipment Setup menu and the Provisioning menu, confirm that the equipment configuration and setting conditions are the same as before replacement. Check that neither alarm is indicated in the Alarm Status. 10 To download the Network/MIB configuration data, Select Configuration File in the download section. Select Network Config radio button and browse to the location where the file is saved and click the Execute button, do the same for MIB Config file. When “Complete” appear on the progress status, click the update button to update the data. CORRECTIVE MAINTENANCE ROI-S07046 Chart 5-5 MDP and Module Replacement (Cont’d) Step Procedure Replacing the DC-DC CONV (Optional). When the power is supplied to the SELV of the DC-DC CONV (optional) but the PWR LED of the DC-DC CONV is not lit though the power switch is on, before replacing the DC-DC CONV, check the conduction of the fuse in the DC-DC CONV. Referring to Chart 2-2, set the MDP to maintenance ON condition by LCT. Set the power switch on the MODEM to Off position. Set the power switch on the DC-DC CONV to Off position. PWR LED ! IF IN/OUT XIF IN XIF OUT Ns XPIC CTRL TX RX XPIC RESET PWR TRP MD/ CBL SELV PWR Switch PULL ALM PWR WS IN/OUT DS1 IN/OUT 100M PORT 1 PORT 2 100M − 43V PWR PROTECT PULL MAINT MEMORY MDP STD OUT ALM FG ALM Screw −43 V/OUT SELV FUSE (250V/8AH) PWR LCT NMS NE AUX/ALM Ns SC IN/OUT EOW CALL MMC Screw PWR LED PWR Switch SELV Disconnect cables connected to the DC-DC CONV as following order. (1) Disconnect power supply cable from SELV connector. (2) Disconnect power supply cable from −43 V/OUT connector. (3) Disconnect ground cable from ground terminal. (4) Disconnect ALM cable from ALM terminal. Loosen two screws fixed the DC-DC CONV. Extract the DC-DC CONV from the MDP shelf. Check that the power switch on the spare DC-DC CONV is Off position. Mount the spare DC-DC CONV to the MDP shelf. Tighten two screws to fix the DC-DC CONV. 10 Connect cables to the DC-DC CONV as reversed order in step 4. 5-43 CORRECTIVE MAINTENANCE ROI-S07046 Chart 5-5 MDP and Module Replacement (Cont’d) Step 5-44 Procedure 11 Turn on the power switch on the DC-DC CONV. 12 Check that PWR LED on the DC-DC CONV is on. 13 Turn on the power switch on the MODEM. 14 Check that PWR LED on the MODEM is on. 15 Check that ALM LED on the MDP is unlited. 16 Set the MDP to maintenance OFF condition by LCT. CORRECTIVE MAINTENANCE ROI-S07046 Chart 5-5 MDP and Module Replacement (Cont’d) Step Procedure B. MDP REPLACEMENT REMOVING Turn off the power switch on the MODEM (both MODEM in 1+1 configuration). Disconnect the IF cable, signal cables and the power cable, etc. as following order. (1) Disconnect XPIC CTRL cables from opposite MDP. (XPIC configuration only.) (2) Disconnect XIF coaxial cables from opposite MDP. (XPIC configuration only.) (3) Disconnect, DS1, LAN, Aux. signal cables from connector. (4) Disconnect power supply cable from SELV connector. (5) Disconnect IF cable from IF IN/OUT connector. (6) Disconnect ground cable from the ground terminal Note: The adapter for IF cable connector is reused. As shown in Fig. 5-13, loosen four screws and remove the MDP. MOUNTING Fix the two brackets to desired position on the MDP, if necessary (see Fig. 5-14). Mount the MDP into the original position of the mounting rack and tighten the four screws. Reconnect the IF cables, signal cables and the power cable to the original position as following order. (1) Connect ground cable to the ground terminal (2) Connect IF cable (with adapter) to IF IN/OUT connector. (3) Connect power supply cable to SELV connector. (4) Connect DS1, LAN, Aux. signal cables to proper connector. (5) Connect XIF coaxial cables to opposite MDP. (XPIC configuration only.) (6) Connect XPIC CTRL cables to opposite MDP. (XPIC configuration only.) 5-45 CORRECTIVE MAINTENANCE ROI-S07046 Chart 5-5 MDP and Module Replacement (Cont’d) Step Procedure Form the wiring, and fix the cables using cable binder to the mounting rack. Notes: 1. Do not cross the cables on front of indicators and power switch used for maintenance. 2. Take suitable radius to wiring the IF cable. (5DFB: 45 mm or more, 8DFB, 10DFB: 70 mm or more) Turn on the power switch on the MDP. Hot Surface SCREW Note: Weight 4 kg. Caution: The top surface of the MDP above MODEM is hot in operation. Fig. 5-13 Demounting and Remounting FRONT POSITION CENTER POSITION SIDE VIEW Fig. 5-14 Bracket Mounting Position 5-46 CORRECTIVE MAINTENANCE ROI-S07046 5.2.3 ALL INDOOR TRP Replacement The procedures for replacing ALL INDOOR TRP with a spare are given in the Chart 5-6. Chart 5-6 ALL INDOOR TRP Replacement Step Procedure REMOVING (ALL INDOOR) Referring to Chart 2-2, set maintenance mode to Maint “ON” by the LCT. Lockout the automatic switching with the LCT for the TX SW and RX SW in 1+1 system, (Set the TX SW and RX SW to No. 1 when the unit in No. 2 is replaced or when the unit in No. 1 is replaced, set those SWs to No. 2.). Turn off the power switch on the associated MDP. Warning: Because the TR UNIT becomes hot during operation, do not touch the upper side of the TR UNIT. Hot Surface Disconnect the IFL cable from the IFL connector on the TR UNIT which is to be replaced. Warning: Do not remove the IFL cable before turning OFF the power switch on the MDP. Disconnect the power supply cable from the DC IN (SEL V) connector on the TR UNIT which is to be replaced. Disconnect SJ cables from the TX terminal and RX terminal on the TR which is to be replaced. Note: Being careful, loosen alternately and gradually the two connectors of the SJ cable. Disconnect FAN ALM cable from the FAN ALM terminal on the TR UNIT which is to be replaced. 5-47 CORRECTIVE MAINTENANCE ROI-S07046 Chart 5-6 ALL INDOOR TRP Replacement (Cont’d) Step Procedure Loosen four screws holding the TR UNIT which is to be replaced. Hold the two screws of upper and lower part of the TR UNIT and pull out the TR UNIT from the shelf. TR UNIT Screws TX RX IF IN/OUT FAN ALM DC IN TR UNIT Screws REMOUNTING (ALL INDOOR) 10 Check that the power switch on the associated MDP is set to OFF. 11 Insert the TR UNIT into the shelf. 12 Using a screw driver, tighten four screws to hold the TR UNIT in the shelf. 13 Connect the IFL cable to the IFL connector on the TR UNIT front panel. Warning: Do not connect the IFL cable before turn OFF the power switch on the MDP. 14 5-48 Connect the power supply cable to the DC IN (SEL V) connector on the TR UNIT front panel. CORRECTIVE MAINTENANCE ROI-S07046 Chart 5-6 ALL INDOOR TRP Replacement (Cont’d) Step 15 Procedure Connect the SJ cables to the TX terminal and the RX terminal on the TR UNIT. Note: Being careful, fasten alternately and gradually the two connectors of the SJ cable. Tightening torque: 0.6 N·m 16 Connect the FAN ALM cable to the FAN ALM terminal on the TR UNIT. 17 Turn on the power switch on the associated MDP. 18 Confirm that alarm LEDs on the TR UNIT and MDP are unlit. 19 Reset the protection switching to Auto mode in the 1+1 system referring to Chart 2-2. 20 Reset the Maintenance mode to off with the LCT. 21 Check that the MAINT LED on the MDP goes off. 5-49 CORRECTIVE MAINTENANCE ROI-S07046 5.2.4 Fuse Replacement When the power is supplied to the SELV but the MDP can not be powered on with the power switch, check the conduction of fuse in the MODEM. Chart 5-7 Fuse Replacement Step Procedure Set the power switch on the MODEM which is not powered to Off position. Disconnect cables connected to the MODEM as following order. (1) Disconnect power supply cable from SELV connector. (2) Disconnect IF cable from IF IN/OUT connector. The adapter is reused. (3) Disconnect ground cable from the ground terminal. 5-50 Loosen two screws on the MODEM. Extract the MODEM from the MDP shelf. Remove protection cap over the fuse (see Fig. 5-15). Remove the fuse from the fuse holder. Check conduction of the broken fuse using tester. Check conduction of the reserved fuse using tester. Replace the broken fuse with reserved one. 10 Set the replaced fuse to the fuse holder. 11 Cap over the replaced fuse. 12 Mount the MODEM to the MDP shelf. 13 Tighten two screws on the MODEM. 14 Connect cables to the MODEM as reversed order in step 2. 15 Turn on the power switch on the MODEM. 16 Check that power is on. CORRECTIVE MAINTENANCE ROI-S07046 (MODEM) (Front) RESERVE Reserve Fuse (6.3A) 21606.3 Fuse RKS-F91000-0107 Fuse Cap Fig. 5-15 Fuse in the MODEM 5-51 CORRECTIVE MAINTENANCE ROI-S07046 When the power is supplied to the SELV of the DC-DC CONV (optional) but the PWR LED of the DC-DC CONV is not lit though the power switch is on, check the conduction of the fuse in the DC-DC CONV. Chart 5-8 DC-DC CONV Fuse Replacement Step Procedure Set the power switch on the DC-DC CONV which is not powered to Off position Disconnect cables connected to the DC-DC CONV as following order. (1) Disconnect power supply cable from SELV connector. (2) Disconnect power supply cable from −43 V/OUT connector. (3) Disconnect ground cable from ground terminal. (4) Disconnect ALM cable from ALM terminal. 5-52 Loosen two screws on the DC-DC CONV. Extract the DC-DC CONV from the unit. Put the screwdriver to the groove of the fuse holder and turns the fuse holder counter clockwise. Remove the fuse from the fuse holder. Check conduction of the broken fuse using tester. Remove the reserved fuse as described in step 5. Check conduction of the reserved fuse using tester. 10 Replace the broken fuse with reserved one. 11 Set the replaced fuse to the fuse holder. 12 Put the screwdriver to the groove of the fuse holder and push it into the DC-DC CONV. 13 Turn the screwdriver clockwise until the fuse holder is locked up. (When the fuse holder is locked up, the groove of the fuse holder is set to horizontal as shown in Fig. 5-16.) 14 Check and replace another fuse in the same way as from Step 5 to Step 13. 15 Mount the DC-DC CONV to the unit. CORRECTIVE MAINTENANCE ROI-S07046 Chart 5-8 DC-DC CONV Fuse Replacement Step Procedure 16 Tighten two screws on the DC-DC CONV. 17 Connect cables to the DC-DC CONV as reversed order in step 2. 18 Turn on the power switch on the DC-DC CONV. 19 Check that power is on. 20 Turn on the power switch on the MDP/DC-DC CONV UNIT. 21 Check that power is on. RESERVE RESERVE (DC-DC CONV) Reserved Fuse Reserve Fuse (8A) GAB250V8 Fuse CBE-006255-001 ! CAUTION HOT SURFACE Avoid contact. Screw − 43V FG PWR OUT STD ALM FUSE (250V/8AH) Screw PULL PWR SELV ALM −43V/OUT Fuse Holder SELV PWR LED PWR Switch (Front) Fig. 5-16 Fuse in the DC-DC CONV 5-53 CORRECTIVE MAINTENANCE (This page is intentionally left blank.) 5-54 54 pages ROI-S07046
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