NEC Neax 2400 Imx System Operations And Maintenance Manual
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CHAPTER 4 NDA-24238 Page 294 Revision 3.0 UNIT/CIRCUIT CARD REPLACEMENT PROCEDURE 3.3.4 PWR Card Replacement Procedure The PWR (PA-PW55-A/PA-PW55-B) and DPWR (PA-PW54-A/PA-PW54-B) cards are mounted respectively in Slot No. 1 and Slot No. 3 of each PIM. The card’s main function is to provide operating power to the circuit cards accommodated in the PIM. The procedures to replace the PWR/DPWR card are as follows: Replacement Procedure ATTENTIONContents Static Sensitive Handling Precautions Required OPE lamp on the card goes OFF. A Confirm the mate CPUs ACT mode Turn OFF the -48V SW on the card to be replaced. Disconnect the power cable from the -48V IN connector. Extract the card to be replaced. Turn ON the MB key on the PWR/DPWR card to be replaced. Turn OFF the -48V SW on the new card. A
NDA-24238 CHAPTER 4 Page 295 Revision 3.0 UNIT/CIRCUIT CARD REPLACEMENT PROCEDURE ATTENTIONContents Static Sensitive Handling Precautions Required OPE lamp on the new card is OFF. OPE lamp on the new card is green. END A Insert the new card into the PIM. Turn OFF the MB key on the card. Extract the card to be replaced. Connect the power cable to the -48V IN connector. Turn ON the MB key on the new card.
CHAPTER 4 NDA-24238 Page 296 Revision 3.0 UNIT/CIRCUIT CARD REPLACEMENT PROCEDURE 4. Fan Unit Replacement This section explains how to replace the Fan Unit (FANU), which is fastened on the TOPU or inside the ded- icated fan box within the system. Because the fan is a vital device to protect the system from heated air, it is recommended that the fan (a total of three per unit) be replaced at least every two years to guarantee its high performance. The mounting location of FANU differs, depending on the module configuration of each cabinet. When the system consists of a total of three modules or less, the FANU is mounted on the TOPU of the cabinet. Other- wise, the FANU is housed in the dedicated fan box in the center of the cabinet. Refer to Figure 4-19. Figure 4-19 FANU Locations Replacement Procedure: FANU on TOPU When the FANU is mounted on the TOPU, perform the following replacement procedure: STEP 1 Using a Phillips screwdriver, remove the four screws. Lift away the top cover. STEP 2 Turn OFF the PWR SW on the PZ-M369. (Refer to Figure 4-20.) STEP 3 Remove the fan fuse (5A) on the PZ-M369. STEP 4 Remove the fan cables from the fan connector and the connector(s) corresponding to the fan to be replaced (for example, when replacing FAN #0, disconnect the FC0 connector together with the fan connector). / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / NECNEAX 2400 IMXTOPU NECNEAX 2400 IMXTOPU FAN BOX located here.FANU is When FANU is mounted on TOPU When FANU is mounted in FAN BOXFRONT VIEW
NDA-24238 CHAPTER 4 Page 297 Revision 3.0 UNIT/CIRCUIT CARD REPLACEMENT PROCEDURE Figure 4-20 Preparation for FANU Replacement (Fans on TOPU) STEP 5 Remove the four screws fastening the fan to be replaced. Refer to Figure 4-21. Note:The removed screws are used in STEP 7 again. Do not dispose of them when unscrewing the fan here. STEP 6 Remove the unscrewed fan from the FANU. STEP 7 Fasten the new fan with the removed screws. STEP 8 Connect the new fan cables to the fan connector and the connector(s) disconnected in STEP 4. STEP 9 Fix the fan fuse (5A) onto the PZ-M369. ATTENTIONContents Static Sensitive Handling Precautions Required PBX NECNEAX 2400 IMS NEAX 2400 IMXNEC Top Cover Unscrew the top cover by using a Phillips Screwdriver and remove it from the TOPU. . .. . .. ......... ......... ......... ......... ......... ......... ......... .............. ................................. ................... ........ ................ ............. ..... ..... ..... ..... .....FANU PZ-M369 3 Disconnect the FAN cable from this power connector. FC0 FC1 FC2 PZ-M369 TH2 FAN TALM1 TALM0 TH1 TH0ON OFF AutoFC2 FC1 FC0 3 Disconnect the cable(s) and the connector(s) here used for the FAN to be replaced. 2 Remove this FAN fuse. OFF 1 Turn PWR SW OFF
CHAPTER 4 NDA-24238 Page 298 Revision 3.0 UNIT/CIRCUIT CARD REPLACEMENT PROCEDURE STEP 10 Set the PWR SW on the PZ-M369 to the AUTO position. Note:The switch setting of the PWR SW can be ON, depending on the location conditions of the system. STEP 11 Attach the top cover again to the original location. Figure 4-21 How to Replace FANU (Fans on TOPU) ATTENTIONContents Static Sensitive Handling Precautions Required . . . . . .......... ......... ......... ......... ......... ......... ......... .............. ................................. ................... ........ ................ ............. ..... ..... ..... ..... ..... FANU (FAN) (FAN) TOPU PBX PZ-M369
NDA-24238 CHAPTER 4 Page 299 Revision 3.0 UNIT/CIRCUIT CARD REPLACEMENT PROCEDURE Replacement Procedure: FANU in Fan Box When the FANU is mounted in the fan box, perform the following replacement: STEP 1 Remove the front cover of the fan box. Then, extract the FANU. STEP 2 Turn OFF the PWR SW on the PZ-M369. (Refer to Figure 4-22.) STEP 3 Remove the fan fuse (5A) on the PZ-M369. STEP 4 Remove the fan cables from the fan connector and the connector(s) corresponding to the fan to be replaced (for example, when replacing FAN #1, disconnect the FC0 connector together with the fan connector). Figure 4-22 Preparation for FANU Replacement (Fans in Fan Box) NECNEAX 2400 IMSPBX ATTENTIONContents Static Sensitive Handling Precautions Required FAN BOX Front Cover Remove the Front Cover and pull out the FANU. PZ-M369 TH2 FAN TALM1 TALM0 TH1 TH0 FC0 FC1 FC2 These dotted squares indicate the fans. They reside in the back side of PZ-M369. PZ-M369 ON OFF AutoFC0 FC1 FC2 OFF 1 Turn PWR SW OFF 3 Disconnect the FAN cable(s) and the connector(s) here used for the FAN to be replaced. 3 Disconnect the FAN cable from this connector. 2 Remove this FAN fuse.
CHAPTER 4 NDA-24238 Page 300 Revision 3.0 UNIT/CIRCUIT CARD REPLACEMENT PROCEDURE STEP 5 Take off the four screws fastening the fan to be replaced. (Refer to Figure 4-23.) Note:The removed screws are used in STEP 7 again. Do not dispose of them when unscrewing the FAN here. STEP 6 Remove the unscrewed fan from the FANU. STEP 7 Fasten the new fan with the removed screws. STEP 8 Connect the new fan cables to the fan connector and the connector(s) disconnected in STEP 4. STEP 9 Fix the fan fuse (5A) again onto the PZ-M369. STEP 10 Insert the FANU into the fan box and fasten it with the two screws. STEP 11 Set the PWR SW on the PZ-M369 to the AUTO position. Note:The switch setting of the PWR SW can be ON, depending on the location conditions of the system. STEP 12 Attach the front cover to the original location. Figure 4-23 How to Replace FANU (Fans in Fan Box) FAN BOX FAN BOX (FAN)FAN power cable FAN BOX PBX FAN power cable (FAN)PZ-M369 ATTENTIONContents Static Sensitive Handling Precautions Required
NDA-24238 CHAPTER 4 Page 301 Revision 3.0 UNIT/CIRCUIT CARD REPLACEMENT PROCEDURE 5. CPR Cooling Fan Replacement This section explains how to replace a cooling fan in the back side of the CPR. This procedure is necessary when a fault is detected in the cooling fan. Because the fan is a vital device to protect the CPR from heated air, it is also recommended that the fan be replaced at least every two years, even if a fault is not detected. STEP 1 Set the CPU, whose rack houses the fan to be replaced, in STBY mode via the MBR key on the DSP (Refer to Figure 4-24.) Note Note: For the ACT/STBY changeover of the CPU, see Chapter 6. STEP 2 Disconnect the power alarm cable from the PALM connector on PZ-PW92. STEP 3 Turn OFF the PWR SW on the PZ-PW92 (Refer to Figure 4-24 Face Layout of CPR.) Figure 4-24 CPR Face Layout STEP 4 Disconnect the power and bus and ether cables from the relevant connectors. Power cables from OUTPWR, INPWR connectors on PZ-PW92 Bus cables from the front connectors on PZ-GT13 and PZ-GT16 Ether (UTP CTG5 ST CA-n) cables from the front connectors on the PZ-PC19. STEP 5 Remove the front bracket, and then take off the four screws fastened onto the CPU. (Refer to Figure 4-25.) STEP 6 Extract the CPR from the LPM. (Refer to Figure 4-25.) Note:In place of PZ-IO27, the CPR may be equipped with PZ-IO28, which does not have the MB (Make- busy) key. 1234 567 8 OFF 12345678 OFF 1234 OFF MBR FDD ON OFF ON OFF OUT PWR IN PW R5AHDD SW MB SYSTEM SELECT0 SENSE SYSTEM SELECT1 SYSTEM SELECT2 CPURST S L O T N o . 0 1 2 3 4 5 6 STATUS IM G 1 IM G 2 IM G 3 CPUOPE WDT IMG0 ON ON ON 4 C026AE PZ-IO27 PZ-PW92 PZ-PC19 (LANI) PZ-GT16 and PZ-GT13 (ISAGT) PALM Note
CHAPTER 4 NDA-24238 Page 302 Revision 3.0 UNIT/CIRCUIT CARD REPLACEMENT PROCEDURE Figure 4-25 Extraction of CPR from LPM STEP 7 Disconnect the fan cable from the connector in the backbone of CPR. Note:The cooling fan is located in the backbone of CPR and the cable connector lies in its right side. Refer to Figure 4-26. Figure 4-26 Rear View of CPR STEP 8 Loosen the two screws fastening the box that contains the fan inside. Slightly lift the box and remove it from the CPR. Refer to Figure 4-26 and Figure 4-27. STEP 9 Take off the four screws and remove the cooling fan from the CPR. Refer to Figure 4-27. STEP 10 Fasten the new cooling fan and CPR with screws. Then, connect the fan cable again to the con- nector. Refer to Figure 4-26 and Figure 4-27. ..... .....12 34 567 812 34 567 812 345 A SLOT No. 01 23 45626E ..... ..... 12 34 567 812 34 567 812 345A SLOT No. 0 1 2 3 4 5 6 26E CPR LPM PBX Connector for Cooling FAN Cable CPR PZ-M14 Cooling FAN
NDA-24238 CHAPTER 4 Page 303 Revision 3.0 UNIT/CIRCUIT CARD REPLACEMENT PROCEDURE STEP 11 Insert the CPR back into the LPM. STEP 12 Fasten the CPR and LPM with the four screws. STEP 13 Connect the disconnected power, bus, and ether cables to the relevant connectors. STEP 14 Turn ON the SW key on the PZ-PW92. STEP 15 Connect the disconnected power alarm cable to the PALM connector on the PZ-PW92. STEP 16 Analyze the indicated system message. The message displayed when the PWR SW on the PZ- PW92 was turned OFF. STEP 17 Clear the indicated ALM and confirm that the ALM lamp is not lit again, indicating that the cooling fan is replaced securely. Figure 4-27 How to Remove the Cooling FAN CPR FRONT REAR