NEC Neax 2400 Ipx System Operations And Maintenance Manual

NDA-24307 CHAPTER 4
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UNIT/CIRCUIT CARD REPLACEMENT PROCEDURE
(5) Insert the new HFD (PZ-IO27) into the CPR. Then, fasten the two screws as shown in
Figure 4-8. 
Figure 4-8   Insertion of New HFD Into CPR
ATTENTIONContents
Static Sensitive
Handling
Precautions Required
LPM
HFD (PZ-IO27/PZ-IO28) 

CHAPTER 4 NDA-24307
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UNIT/CIRCUIT CARD REPLACEMENT PROCEDURE
(6) Make sure Switch 8 of SYSTEM SELECT 1 (DIP Switch) on each CPU Front Panel
is set to ON. (Do this for all LNs and ISW: Refer to Figure 4-9.)
Figure 4-9   Switch Setting on the CPU Front Panel
ATTENTIONContents
Static Sensitive
Handling
Precautions Required
12
34
567
8
OFF
12
34
OFF
MBR
FDD ON
OFF
PALM
ON
OFF OUT PWR
IN PWR5AHDD SW
MB
SYSTEM SELECT0
SENSE
SYSTEM SELECT2
CPURST
SLOT No.    0 1 2 3 4 5 6 STATUS IMG1 IMG2 IMG3...

NDA-24307 CHAPTER 4
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UNIT/CIRCUIT CARD REPLACEMENT PROCEDURE
1.3.2 EMA Card Replacement Procedure
The EMA (PH-PC40) card is mounted in slot No. 04 of the LPM. The main
functions of the card are as follows:
Designation of ACT/STBY status of the CPU and forced changeover of the
system
Shutoff of the system’s power supply and detection of rising temperature within the system
Control of the NCU (PA-M53) card
Replacement Procedure
ATTENTIONContents
Static Sensitive
Handling
Precautions...

CHAPTER 4 NDA-24307
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UNIT/CIRCUIT CARD REPLACEMENT PROCEDURE
ATTENTIONContents
Static Sensitive
Handling
Precautions Required
OPE/MB Lamp on the EMA card 
lights steady-green.
The 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/ATIMN
END
A
Set the keys on the new card by referring to the 
Insert the new card into the LPM.card being replaced....

NDA-24307 CHAPTER 4
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UNIT/CIRCUIT CARD REPLACEMENT PROCEDURE
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
external equipment, such as the Maintenance Administration Terminal (MAT),
Station Message Detail Recording System (SMDR), Message Center Interface
(MCI), Property Management System (PMS), etc.
AT T E N T I O NContents
Static Sensitive...

CHAPTER 4 NDA-24307
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UNIT/CIRCUIT CARD REPLACEMENT PROCEDURE
ATTENTIONContents
Static Sensitive
Handling
Precautions Required
OPE lamp on the IOC card lights 
red.
Release of I/O ports: new IOC card 
is initialized, and I/O port channels 
reopens.
OPE lamp lights 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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UNIT/CIRCUIT CARD REPLACEMENT PROCEDURE
1.3.4 Power Supply Unit Replacement Procedure
ATTENTIONContents
Static Sensitive
Handling
Precautions Required
CPU System 
Changeover
Refer to Section 12, 
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 UNIT.
Disconnect...

CHAPTER 4 NDA-24307
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ATTENTIONContents
Static Sensitive
Handling
Precautions Required
END Insert the new PWR UNIT into the CPR.
Unscrew the PWR UNIT from the CPR.
Turn ON the SW key on the PWR UNIT.
A
On the EMA card, set EMA SUP switch DOWN.
Reattach power alarm cable to the PALM 
connector on the PZ-PW92.Reattach power cables to OUTPWR
and INPWR connectors on the PZ-PW92. 

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UNIT/CIRCUIT CARD REPLACEMENT PROCEDURE
1.3.5 MISC Card Replacement Procedure
ATTENTIONContents
Static Sensitive
Handling
Precautions Required
Keep MB switch UP.
END Extract the MISC card from its mounting slot.
On the MISC card, set MB switch UP.
On the MISC card, set MB switch DOWN.
START
Insert the new circuit card into the same 
mounting slot. 

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UNIT/CIRCUIT CARD REPLACEMENT PROCEDURE
1.3.6 MMC Card Replacement Procedure
The MMC (PH-M22) card is mounted in slot No. 00 of the LPM. The card’s main
functions are:
To collect key setting information on the TOPU of each LN/ISW. 
Note
To collect alarm information on LN or the entire system (in case of MMC in
ISW), thereby activating MJ/MN LED on the TOPU display.
Note:If the key setting affects the entire system (i.e. the SYSTEM side is selected by the INITIAL...