NEC Neax 2400 Ipx System Operations And Maintenance Manual

NDA-24307 CHAPTER 5
Page 413
Issue 1
FAULT REPAIR PROCEDURES
7. CONTROL SYSTEM FAULT
This section explains the fault repair procedure for the control system listed in Table 5-9.
7.1 Check Point
When repairing the control system, check the status of the following lamps:
LN
CPR
GT
TSW
MUX
EMA
ISW
CPR
IOGT
TSW
HSW
EMA
Figure 5-1 and Figure 5-2 shows a block diagram of the control system.
Table 5-9  Control System Fault Situation
FAULTY SITUATION REFERENCE SECTION
Fault occurs occasionally at the...

CHAPTER 5 NDA-24307
Page 414
Issue 1
FAULT REPAIR PROCEDURES
7.2 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 with
a spare, and check.
Replace the...

NDA-24307 CHAPTER 5
Page 415
Issue 1
FAULT REPAIR PROCEDURES
(2) For Single Configuration
Replace the related circuit card with a spare,
and check.Replace the circuit cards individually by 
referring to the following sections in Chapter 4:
LN
Section 1.3.1, CPR Replacement Procedure
Section 1.3.2, EMA Card Replacement
Procedure 
Section 2.3.1, GT Card Replacement Procedure
Section 2.3.2, TSW Card Replacement
Procedure
Section 3.3.2, MUX Card Replacement
Procedure
ISW
Section 1.3.1, CPR Replacement...

CHAPTER 5 NDA-24307
Page 416
Issue 1
FAULT REPAIR PROCEDURES
7.3 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
with a spare, and check.Replace the circuit cards individually by 
referring to the following paragraphs in Chapter 
4:
LN
Section...

NDA-24307 CHAPTER 5
Page 417
Issue 1
FAULT REPAIR PROCEDURES
8. ALARM INDICATION FAULT
This section explains the fault repair procedure where any of the faults shown in Table 5-10 occur.
8.1 Check Point
When repairing an alarm indication fault, check the alarm cable route shown in Figure 5-10 and Figure 5-
11.
8.2 Fault of Alarm Indicating Panel
Table 5-10  Alarm Indication Fault Situation
FAULTY SITUATION REFERENCE SECTION
A fault is indicated on the TOPU, but it is not indicated on the Alarm Indicating...

CHAPTER 5 NDA-24307
Page 418
Issue 1
FAULT REPAIR PROCEDURES
Figure 5-10   Cable Routing for Alarm Indications
Alarm
Indicating
Panel
KEYDSP
DSPLKEY
ALMA
ALMB
MISC0B
MISC0A
EXALM
ALM1
CN3CN2CN1CN0
KEY
(00) (04) Alarm Lamps
TOPU
ISWMTOPU
ISWM
LPM LPM
00 0403 02 01
    MMC
PH-M22
To CN0 connector of LN0 To CN0 connector of LN1 To CN0 connector of LN2 To CN0 connector of LN3
MDF68PH EXMISC CA Cable
A
ISW (FRONT VIEW) ISW (REAR VIEW)
:  CHAMP connector-ended cable:  Internal alarm bus cable
:  Connector:...

NDA-24307 CHAPTER 5
Page 419
Issue 1
FAULT REPAIR PROCEDURES
Figure 5-11   Cabling Related to Alarm Indicating Panel
Table 5-11  PIN Location of External Alarm
126
2MPALM 27
328
4 EXTAA 29
530
6 BELAA 31
732
8MNAA 33MNBA
9 SUPAA 34 SUPBA
10 MJAA 35 MJBA
11 36
12 37
   Alarm  
Indicating  
    Panel
LPM
Backplane
MISC0A
BELAA
MNAA
SUPAA
MJAA
BELBA
MNBA
SUPBA
MJBA
RPT1(G)
RPT0(-48V)
Fuse
-48V
G
MJ / MN / BELL ISW
CHAMP Connector Cable
MDF 68PH EXMISC CA Cable
Power Receiving Terminal 

CHAPTER 5 NDA-24307
Page 420
Issue 1
FAULT REPAIR PROCEDURES
Figure 5-12   Distribution/Collection of Key/Alarm Information within the System
PZ-DK222
       (TOP KEY)
PH-PC40 PH-M22
EMA
RELAY
RECEIVER
PZ-DK222
       (TOP KEY)
PH-PC40 PH-M22
EMA
RELAY
RECEIVER
PZ-DK227
       (TOP KEY)
PH-PC40 PH-M22
EMA SEL
RELAY
RECEIVER
ISEL ISW
LN LN
AUDIBLE
AND
VISUAL
ALARM
INDICATING
PANEL
KEY INFORMATION
ALM INFORMATION
This figure shows the flow of alarm and key information between ISW and each LN. 

NDA-24307 CHAPTER 5
Page 421
Issue 1
FAULT REPAIR PROCEDURES
Figure 5-13   Alarm Bus Cable Connections Diagram (1/2)
To MMC (       ) of LN3 To MMC (       ) of LN2 To MMC (       ) of LN1
ISWM
HSW0/1TSW0/1IOGT0/1PLO0/1PWRSW
          0/1
ISWM
ALMA
ALMB
DSPLTOPUPZ-DK227
This figure shows the alarm bus cable connections diagram.
IMG0 (LN0)
MUX 0LC/TRKMUX 1PWR
DPWR
PIM 3
ALMA
ALMB
DSPLKEY
KEY
TOPU
MUX 0LC/TRKMUX 1PWR
DPWR
PIM 0
ALMA
ALMB
EMAFHALMEMA
CN0
CN0
CN0
MUX 0LC/TRKMUX 1PWR
DPWR
PIM 1
ALMA
ALMB
MUX...

CHAPTER 5 NDA-24307
Page 422
Issue 1
FAULT REPAIR PROCEDURES
Figure 5-13  Alarm Bus Cable Connections Diagram (2/2)
LED3
LED2
LED1
ALM3
MUSIC
ALM2
ALM1
EXALMDSP
ALMKEY
PALM1
MISC0B
PALM0
LPM of LN0 (REAR VIEW)Slot 00 Slot 04
EMA
This figure shows the alarm bus cable connections diagram.
:  Alarm-related connector:  Circuit Card:  External Cable
EMA:  PH-PC40           MUX:  PH-PC36
IMG2 (LN0)
MUX 0LC/TRKMUX 1PWR
DPWR
PIM 3
ALMA
ALMB
DSPMTOPU
MUX 0LC/TRKMUX 1PWR
DPWR
PIM 0
ALMA
ALMB
TSWM1 (REAR VIEW)
MUX...