NEC Neax 2400 Ipx System Operations And Maintenance Manual
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NDA-24307 CHAPTER 4 Page 343 Issue 1 UNIT/CIRCUIT CARD REPLACEMENT PROCEDURE 4.3.4 PLO Card Replacement Procedure The PLO (PH-CK16-A/17-A) card is located in Slot No. 09 or 13 within the ISWM. Used together with a different direct digital interface circuit card, the card’s main function is to set up the clock synchronization on the network. Use the procedures below to replace the PLO card with a spare. Note:The ACT/STBY of PLO can be changed over via a single MB key operation on the circuit card (ACT side). Though its circuit is controlled by the IOGT (PH-GT10) card via TSW I/O bus, the switching system of PLO (ISW) is not affected by the Speech Path system changeover, differing from other echelons such as IOGT, TSW, and HSW. Refer to Section 12, Chapter 6. Replacement Procedure ATTENTIONContents Static Sensitive Handling Precautions Required PLO system is changed over from ACT to STBY mode. OPE lamp on the PLO card goes OFF. Check the following lamp indications on the mate PLO cards: OPE = Steady-green A START Extract the PLO card to be replaced from the ISWM. Check the mate PLOs ACT mode. On the active PLO (PH-CK16-A/17-A) card, set the MB key UP. Set the keys on the new card according to the card replaced.
CHAPTER 4 NDA-24307 Page 344 Issue 1 UNIT/CIRCUIT CARD REPLACEMENT PROCEDURE OPE lamp on the new card is OFF. OPE lamp on the new card remains OFF. ATTENTIONContents Static Sensitive Handling Precautions Required END A Insert the new PLO card into the ISWM. On the new PLO card, set the MB key UP. Set the MB key on the new card DOWN.
NDA-24307 CHAPTER 4 Page 345 Issue 1 UNIT/CIRCUIT CARD REPLACEMENT PROCEDURE 4.3.5 PWR SW Card Replacement Procedure The PWR SW (PH-PW14) card is mounted in Slot No. 00 or 01 within the ISWM. The card’s main function is to supply DC -48V operating power to the same ISWM circuit cards and also DC +5, -5 V and +12 V output power to the PLO cards. Use the following procedures to replace the card with a new one. Replacement Procedure ATTENTIONContents Static Sensitive Handling Precautions Required P-ON lamp on the PWR SW card goes OFF. ALM lamp on the PWR SW card lights red. P-ON lamp on the new card is OFF. ALM lamp on the PWR SW card lights red. P-ON lamp on the new card lights steady-green. ALM lamp on the PWR SW goes OFF. END START Extract the PWR SW card to be replaced from the ISWM. On the new PWR SW card, set the SW key DOWN. On the PWR SW (PH-PW14) card, set the SW key DOWN. Insert the new PWR SW card into the ISWM. On the new PWR SW card, set the SW key UP.
CHAPTER 4 NDA-24307 Page 346 Issue 1 UNIT/CIRCUIT CARD REPLACEMENT PROCEDURE 5. FAN UNIT REPLACEMENT This section explains how to replace the Fan Unit (FANU), which is fastened on the TOPU or inside the dedicated 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. Otherwise, the FANU is housed in the dedicated fan box in the center of the cabinet. Figure 4-17 FANU Locations Replacement Procedure: FANU on TOPU When the FANU is mounted on the TOPU, perform the following replacement procedure. (Refer to Figure 4- 18.): 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. 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-24307 CHAPTER 4 Page 347 Issue 1 UNIT/CIRCUIT CARD REPLACEMENT PROCEDURE Figure 4-18 Preparation for FANU Replacement (Fans on TOPU) STEP 5 Remove the four screws fastening the fan to be replaced. Refer to Figure 4-19. Note:The removed screws are used in STEP 7 again. Do not dispose of them when unscrewing the fan here. PBX NECNEAX 2400 IMS NEAX 2400 IMSNEC Top Cover Unscrew the top cover by using a Phillips Screwdriver and remove it from the TOPU. . .. . .. ......... ......... ......... ......... ......... ......... ......... .............. ................................. ................... ........ ................ ............. ..... ..... ..... ..... .....FANU PZ-M369 TH2 FAN TALM1 TALM0 TH1 TH0 FC0 FC1 FC2 PZ-M369 ON OFF AutoFC2 FC1 FC0 OFF 1 Turn PWR SW OFF 3 Disconnect the cable(s) and the connector(s) here used for the FAN to be replaced. 2 Remove this FAN fuse.3 Disconnect the FAN cable from this power connector.
CHAPTER 4 NDA-24307 Page 348 Issue 1 UNIT/CIRCUIT CARD REPLACEMENT PROCEDURE 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. 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 4-19 How to Replace FANU (Fans on TOPU) ATTENTIONContents Static Sensitive Handling Precautions Required . . . . . .......... ......... ......... ......... ......... ......... ......... .............. ................................. ................... ........ ................ ............. ..... ..... ..... ..... ..... FANU (FAN) (FAN) TOPU PBX PZ-M369
NDA-24307 CHAPTER 4 Page 349 Issue 1 UNIT/CIRCUIT CARD REPLACEMENT PROCEDURE Replacement Procedure: FANU in Fan Box When the FANU is mounted in the fan box, perform the following replacement procedures: 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 4-20.) 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 1, disconnect the FC0 connector together with the fan connector). Figure 4-20 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-24307 Page 350 Issue 1 UNIT/CIRCUIT CARD REPLACEMENT PROCEDURE STEP 5 Take off 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) 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 4-21 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-24307 CHAPTER 4 Page 351 Issue 1 UNIT/CIRCUIT CARD REPLACEMENT PROCEDURE 6. 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 4-22.) 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 4-22.) Figure 4-22 CPR Face Layout STEP 4 Disconnect the power, bus, and Ethernet cables from the relevant connectors. Power cables from OUTPWR, INPWR connectors on PZ-PW92 Bus cables from the front connectors on PZ-GT13/PZ-GT20 Ethernet (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 4-23.) STEP 6 Extract the CPR from the LPM. (Refer to Figure 4-23.) 12 34 567 8 OFF 12 34 567 8 OFF 12 34 OFF MBR FDD ON OFF ON OFF OUT PWR IN PWR5AHDD SW MB SYSTEM SELECT0 SENSE SYSTEM SELECT1 SYSTEM SELECT2 CPURST SLOT No. 0 1 2 3 4 5 6 STATUS IMG1 IMG2 IMG3 CPUOPE WDTIMG0 ON ON ON 4C026AE PZ-IO27 PZ-PW92 PZ-PC19 (LANI) PZ-GT20 (ISAGT) PZ-GT13 (ISAGT) PALM Note 1 Note 2 Note 1:PZ-GT20 is located in LN only. Note 2:In place of PZ-I027, the CPR may be equipped with PZ-I028 which does not have the MB key.
CHAPTER 4 NDA-24307 Page 352 Issue 1 UNIT/CIRCUIT CARD REPLACEMENT PROCEDURE Figure 4-23 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 4-24. Figure 4-24 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 4-24 and Figure 4-25. ..... .....12 34 567 812 34 567 812 345A SLOT No. 01 2 3 45626E ..... ..... 12 34 567 812 34 567 812 345A SLOT No. 0 1 2 3 4 5 6 26E CPR LPM PBX By using the Phillips screwdriver, remove the four screws. Then, extract the CPR with particular care. Connector for Cooling FAN Cable CPR PZ-M14 Cooling FAN