NEC Neax 2400 Imx System Operations And Maintenance Manual

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UNIT/CIRCUIT CARD REPLACEMENT PROCEDURE
Circuit Card Installation Into New CPR
This procedure shows how to install the new CPR into the LPM.
(1) Detach the front panel of the new CPR by using the Phillips screwdriver to remove
the four screws, as shown in Figure 4-9. Then, lift the top cover by removing the
eight screws.
Figure 4-9   Removal of Front Panel and Top Cover From CPR
ATTENTIONContents
Static Sensitive
Handling
Precautions Required
Top Cover
CPRFront...

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(2) Insert the ISAGT (PZ-GT13) and LANI (PZ-PC19) cards into the following slots of
the new CPR (refer to Figure 4-10):
ISAGT (PZ-GT13) →Slot #6 (ISA)
LANI (PZ-PC19) →Slot #0 (PCI) (For Netfusing Link)
LANI (PZ-PC19) →Slot #1 (PCI) (When connecting MAT via 10-BASE T and PCI buses)
LANI (PZ-PC19) →Slot #3 (PCI) (When LANI for Netfusing Link is in dual configuration)
Note:The location of the second LANI (PCI Slot 3) is...

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(3) Reattach the top cover by fastening the removed eight screws. Then, reattach the
front panel by fastening the removed four screws. Refer to Figure 4-11.
Figure 4-11   Reattachment of CPR Top Cover and Front Panel
ATTENTIONContents
Static Sensitive
Handling
Precautions Required
Top Cover
CPRFront Panel 

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(4) After turning ON the MBR key on the DSP of the new CPR, insert the new CPR into
the LPM as shown in Figure 4-12. Then, fasten the retained four screws.
Figure 4-12   Location of New CPR Into LPM
ATTENTIONContents
Static Sensitive
Handling
Precautions Required
CPR LPM 

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(5) Lastly, insert the new HFD into the CPR. Then, fasten the two screws
as shown in Figure 4-13. 
Figure 4-13   Insertion of New HFD Into CPR
1.3.2 EMA Card Replacement Procedure
The EMA (PH-PC40) card is mounted in Slot No. 04 of the LPM. The main func-
tions of the card are as follows:
 Designation of ACT/STBY status of the CPU and forced changeover of the sys-
tem
 Shutoff of the system’s power supply and detection of...

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Replacement ProcedureBefore replacing the EMA card, check the CPU #0’s ACT mode. Attempting to replace the card
when the CPU is active will result in the system being initialized.
WAR NI NG
 Check the CPU OPE lamp of DSP 
#1. When the lamp is steady-green, 
perform the system changeover.
 OPE/MB lamp on the EMA card 
lights red from green.
 When NCU (PA-M53) cards are 
mounted, Power Failure Transfer 
(PFT) is...

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ATTENTIONContents
Static Sensitive
Handling
Precautions Required
 OPE/MB lamp on the EMA card is 
steady-green.
 PFT service is cancelled: 
resumption of normal operation.
Turn ON the MB and EMA SUP keys on the
new card.
Turn OFF the MB and EMA SUP keys on the card.
Assign the time data by using the ATIM command.
END
A
Set the keys on the new card by referring to the 
Insert the new card into the LPM.card being replaced. 

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1.3.3 IOC Card Replacement Procedure
The IOC (PH-IO24) card is mounted in Slot No. 02 and/or 03 of the LPM. The
card’s main function is to provide a serial interface between the system and its ex-
ternal equipment, such as the Maintenance Administration Terminal (MAT), Sta-
tion Message Detail Recording System (SMDR), Message Center Interface (MCI),
Property Management System (PMS), etc.
Replacement Procedure
AT T E N T I O...

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ATTENTIONContents
Static Sensitive
Handling
Precautions Required
 OPE lamp on the IOC card is red.
 Release of I/O ports: new IOC card 
is initialized, and I/O port channels 
reopens.
 OPE lamp is green.
Turn OFF the MB key on the card.
END Insert the new card into the LPM.
Turn ON  the MB and MBR keys on the 
new card.
Turn OFF the MBR key on the card.
A 

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1.3.4 Power Supply Unit Replacement Procedure
ATTENTIONContents
Static Sensitive
Handling
Precautions Required
 CPU System 
Changeover
Refer to Section 12.1.2 
in Chapter 6.
Cable to be disconnected from OUTPWR
CPU #0: 6P-(4P-3P) PWR CA-A
CPU #1: 6P-(4P-3P) PWR CA-B
START
Set the mode of the PWR UNIT (PZ-PW92)
to be replaced into STBY mode.
On the EMA (PH-PC40) card, set EMA SUP
switch UP.
Turn OFF the SW key on the PWR...