NEC Neax 2400 Imx System Operations And Maintenance Manual
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![Page 386
NDA-24238 CHAPTER 5
Page 359
Revision 3.0
FAULT REPAIR PROCEDURES
6.2 Control System Fault - Fault Occurs Intermittently
Faulty Situation:
Fault occurs intermittently at ACT side in the dual configuration system.
Fault occurs intermittently in the single configuration system.
[0-C] ~ [0-K] CPU Failure
[1-C] Both TSW Write Failure
[1-D] TSW Write Failure
[3-D], [3-E] Lock-Up Failure (Permanent/Temporary)
(1) For Dual Configuration
Replace ACT-side related circuit card
(CPU, GT, TSW, MUX, EMA) with...](http://img.usermanuals.tech/thumb/54/84348/w64_nec-neax2400-imx-system-operations-and-maintenance-manual_d-385.png "Page 386
NDA-24238 CHAPTER 5
Page 359
Revision 3.0
FAULT REPAIR PROCEDURES
6.2 Control System Fault - Fault Occurs Intermittently
Faulty Situation:
Fault occurs intermittently at ACT side in the dual configuration system.
Fault occurs intermittently in the single configuration system.
[0-C] ~ [0-K] CPU Failure
[1-C] Both TSW Write Failure
[1-D] TSW Write Failure
[3-D], [3-E] Lock-Up Failure (Permanent/Temporary)
(1) For Dual Configuration
Replace ACT-side related circuit card
(CPU, GT, TSW, MUX, EMA) with...")
![Page 388
NDA-24238 CHAPTER 5
Page 361
Revision 3.0
FAULT REPAIR PROCEDURES
6.3 Control System Fault - STBY Side Is Faulty
Faulty Situation:
Fault has occurred in the STBY side of dual configuration system.
[0-I] STBY CPU Failure
The ACT side has become faulty, and system changeover has executed.
[0-C], [0-H], [0-J] Processor Failure (ACT side)
Replace STBY side related circuit cards
(CPU, GT, TSW, MUX, EMA) with a spare,
and check.Replace the circuit cards (CPU, GT, TSW,
MUX, EMA) individually by referring...](http://img.usermanuals.tech/thumb/54/84348/w64_nec-neax2400-imx-system-operations-and-maintenance-manual_d-387.png "Page 388
NDA-24238 CHAPTER 5
Page 361
Revision 3.0
FAULT REPAIR PROCEDURES
6.3 Control System Fault - STBY Side Is Faulty
Faulty Situation:
Fault has occurred in the STBY side of dual configuration system.
[0-I] STBY CPU Failure
The ACT side has become faulty, and system changeover has executed.
[0-C], [0-H], [0-J] Processor Failure (ACT side)
Replace STBY side related circuit cards
(CPU, GT, TSW, MUX, EMA) with a spare,
and check.Replace the circuit cards (CPU, GT, TSW,
MUX, EMA) individually by referring...")
CHAPTER 5 NDA-24238 Page 364 Revision 3.0 FAULT REPAIR PROCEDURES 7. ALARM INDICATION FAULT This section explains the fault repair procedure where any of the faults shown in Table 5-9 occur. 7.1 Check Point When repairing an alarm indication fault, check the alarm cable route shown in Figure 5-11 and Figure 5- 12. 7.2 Fault of Alarm Indicating Panel Table 5-9 Alarm Indication Fault Situation FAULTY SITUATION REFERENCE SECTION A fault is indicated on the TOPU, but it is not indicated on the Alarm Indicating Panel (External Alarm Indicating Panel).Section 7.2, Fault of Alarm Indicating Panel A system message is indicated, but no alarm indication is made on the TOPU. An alarm lamp on the circuit card is lighting, but no alarm indication is made on the MAT or on the TOPU.Section 7.3, Fault That Cannot Be Detected ATTENTIONContents Static Sensitive Handling Precautions RequiredConfirm lamps and power supply circuit of the Alarm Indicating Panel. Confirm cross connections on the MDF. Confirm that the connector of 16 PH EXALM CA is firmly plugged in the EXALM connector on the backplane of LPR. START END
NDA-24238 CHAPTER 5 Page 365 Revision 3.0 FAULT REPAIR PROCEDURES Figure 5-11 Cable Routing for Alarm Indications Figure 5-12 Cabling Related to Alarm Indicating Panel A DSP A DSPLAlarm Lamps TOPU PIM3 PIM2 PIM1 PIM0 LPMEMA MDF 16PH EXALM CAAlarm Indicating Panel ALMA ALMB ALMA ALMB A A ALMA ALMB ALMA ALM : Flat Cable : CHAMP Connector-Ended Cable : Connector : To alarm information of PWR, MUX, TSW : Circuit Card Symbols A RPT1 RPT0 LPMMDF 16PH EXALM CA Alarm Indicating Panel MJA MJ MN MNA BELL BELL MJB MNB G CHAMP Connector Cable EXALM Backplane G-48VFuse-48V Power Receiving Terminal P
CHAPTER 5 NDA-24238 Page 366 Revision 3.0 FAULT REPAIR PROCEDURES 7.3 Fault That Cannot Be Detected Check the DSP flat cable (See Figure 5-10.). If the EMA card is removed from the system while the system is in operation under the control of the CPU #1, the system will reset and stop all call processing. See Section 1.3.2, EMA Card Replacement Procedure, in Chapter 4 for detailed instructions. Replace the EMA circuit card with a spare. Set the MB switch of the EMA circuit card, and extract the circuit card from its mounting slot. Make necessary switch settings on the new circuit card. Set MB switch UP side and insert the circuit card into its mounting slot. Set the MB switch DOWN. Check to see if a fault is detected. ATTENTIONContents Static Sensitive Handling Precautions Required START END WA RN I NG
NDA-24238 CHAPTER 5 Page 367 Revision 3.0 FAULT REPAIR PROCEDURES 8. POWER SUPPLY FAULT This section explains the fault repair procedure when any of the faults shown in Table 5-10 occur. 8.1 Check Point When repairing a power supply fault, consider the following items: (1) Before checking the system, check the rectifier, battery, and power cables. (2) The PWR circuit card is equipped with the circuits to supply ringing signal and howler tone. When a fault occurs that causes the bell of the telephone not to ring, or howler tone cannot be heard, etc., check the alarm lamp on the PWR circuit card. (3)Figure 5-13 through Figure 5-15 show the block diagrams for the power supply to each module. Figure 5-13 Block Diagram of Power Supply System (IMG0)Table 5-10 PWR Supply Fault Situation FAULTY SITUATION REFERENCE SECTION Fuse Blown FaultSection 8.2, Fuse Blown Fault Circuit Breaker OFF, Fault in PWR SupplySection 8.3, Circuit Breaker OFF Fault in PWR Supply Fault of Alarm Lamps on PWR SupplySection 8.4, Fault of Alarm Lamps on PWR Supply Note:PWR1 is mounted when power supply system is a dual system configuration. PWR 0 PWR 1LC/TRKLC/TRKMUX0MUX1LC/TRKLC/TRK PIM3 Note PWR 0 PWR 1LC/TRKLC/TRKMUX0MUX1LC/TRKLC/TRK PIM2 Note PWR 0 PWR 1LC/TRKLC/TRKMUX0MUX1LC/TRKLC/TRK PIM1 Note PWR 0 PWR 1LC/TRKLC/TRKMUX0MUX1INT1LC/TRK PIM0 Note PWR 0 PWR 1EMAIOCMISC LPM NoteCPU0ISAGT0 BASEUIMG0
CHAPTER 5 NDA-24238 Page 368 Revision 3.0 FAULT REPAIR PROCEDURES Figure 5-14 Block Diagram of Power Supply System (IMG1) Figure 5-15 Block Diagram of Power Supply System (IMG2/3) Note:PWR1 is mounted when power supply system is a dual system configuration. PWR 0 PWR 1LC/TRKLC/TRKMUX0MUX1LC/TRKLC/TRK PIM3 Note PWR 0 PWR 1LC/TRKLC/TRKMUX0MUX1LC/TRKLC/TRK PIM2 Note PWR 0 PWR 1LC/TRKLC/TRKMUX0MUX1LC/TRKLC/TRK PIM1 Note PWR 0 PWR 1LC/TRKLC/TRKMUX0MUX1INT1LC/TRK PIM0 Note PWR 0 PWR 1MISC LPM NoteDLKC0PLO0 BASEUIMG1 TSW03TSW02TSW01TSW00GT0 Note:PWR1 is mounted when power supply system is a dual system configuration. PWR 0 PWR 1LC/TRKLC/TRKMUX0MUX1LC/TRKLC/TRK PIM3 Note PWR 0 PWR 1LC/TRKLC/TRKMUX0MUX1LC/TRKLC/TRK PIM2 Note PWR 0 PWR 1LC/TRKLC/TRKMUX0MUX1LC/TRKLC/TRK PIM1 Note PWR 0 PWR 1LC/TRKLC/TRKMUX0MUX1INT1LC/TRK PIM0 Note DUMMY BASEUIMG2/3
NDA-24238 CHAPTER 5 Page 369 Revision 3.0 FAULT REPAIR PROCEDURES (4)Figure 5-16 shows the power supply system for PIM. Figure 5-16 Power Supply to PIM (5)Figure 5-17 shows the power supply system for LPM. Figure 5-17 Power Supply to LPM DC-DC CONV RGU HOW -48V NFB +80V relRGU REL PWR0 -48V +80V Note +5V, +12V, -5V CR (for LC) HOW (for LC) -48V (for LC, TRK) +80V +80V -48V DC-DC CONV RGU HOW -48V NFB +80V relREL PWR1 Note:+80V is for message waiting lamp. +5V,+12V (To EMA, MISC, Cards, etc.) -48V (To EMA, MISC, Cards, etc.)PWR1 PWR0 DC-DC CONV DC-DC CONV -48V +80VREL REL -48V +80V (To CPR#0) -48V (To CPR#1) -48V
CHAPTER 5 NDA-24238 Page 370 Revision 3.0 FAULT REPAIR PROCEDURES (6)Figure 5-18 shows the power supply system for TSWM. Figure 5-18 Power Supply to TSWM +5V, +12V, +5V (To MISC Cards) -48V (To MISC, GT, TSW, DLKC,PWR1 PWR0 DC-DC CONV DC-DC CONV -48V +80VREL REL -48V +80V -48V -48V PLO Cards)
NDA-24238 CHAPTER 5 Page 371 Revision 3.0 FAULT REPAIR PROCEDURES 8.2 Fuse Blown Fault Check the backplane of the PIM. Make a visual check on the backplane for pin contacting, melting or burn, etc. Extract all the circuit cards from the PIM, and insert them back into their slots individually to see if the fuse blows.Set the MB switch of the PWR supply UP. Set the circuit breaker of the PWR supply DOWN. Extract all the circuit cards from their mounting slots, except PWR supply. Replace the fuse with spare. Set the circuit breaker of the PWR supply UP side. Set the MB switch of the PWR supply DOWN. Insert the circuit cards into their mounting slots individually, with their MB switch to UP side. Check to see if the fuse blows when the MB switch has been set to DOWN. START END
CHAPTER 5 NDA-24238 Page 372 Revision 3.0 FAULT REPAIR PROCEDURES 8.3 Circuit Breaker OFF Fault in PWR Supply Check the backplane of the PIM. Make a visual check on the backplane for pin contacting, melting or burning, etc. Extract all the circuit cards from the PIM, and make a visual check of the circuit cards.Set MB switch of the PWR supply UP. Set the circuit breaker of the PWR supply DOWN. Extract all circuit cards out of their mounting slots. Make a visual check of the extracted circuit cards. Check ICs, resistors, and capacitors to see if any are burned. START END
NDA-24238 CHAPTER 5 Page 373 Revision 3.0 FAULT REPAIR PROCEDURES 8.4 Fault of Alarm Lamps on PWR Supply Note:Insert each PWR supply with its MB switch to UP side, and then set it back to DOWN side. Press RESET button of the PWR supply. Alarm lamp goes out.FA U LT S U P E RV I S I O N Alarm lamp illuminates again. Set the MB switch on the PWR supply UP. Turn circuit breaker OFF. Set MB switch on all the circuit cards, except PWR supply. Extract all circuit cards from their mounting slots. Turn circuit breaker ON. Set the MB switch to DOWN side. Check to see if the alarm lamp illuminates. If the alarm lamp illuminates, replace the PWR supply with a spare. If the alarm lamp does not illuminate, insert the circuit cards into their mounting slot individually to see if the alarm lamp illuminates. START END