NEC Neax 2400 Imx System Operations And Maintenance Manual

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UNIT/CIRCUIT CARD REPLACEMENT PROCEDURE
TSW Card Replacement Procedure
Use extreme care when operating the keys on the circuit card.
Figure 4-17   LEDs and Switches for TSW Changeover
WA RN I NG
ATTENTIONContents
Static Sensitive
Handling
Precautions Required
System Changeover. Check the following
lamp indications on the circuit cards to be
affected and ensure that they are all OFF:
 TSW ACT (TSW cards)
 OPE/MB (DLKC card) Note
 MUX ACT (MUX cards)
Note:If the...

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 TSW ACT lamp on the TSW card is 
red.
 TSW ACT lamp on the new card is 
red.
ATTENTIONContents
Static Sensitive
Handling
Precautions Required
B
Set TSW MBR and MB keys on the new card UP.
A
Insert the new TSW card into the TSWM.Set the keys on the new card, 
referring to the card replaced.
Extract the TSW card to be replaced
from the TSWM. On the TSW card to be replaced, 
set the MB switch UP.
Confirm M0SY, M1SY, M2SY,...

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Note:
The system changeover of TSW card can be executed also by using the CMOD command. For details,
refer to Chapter 8, Maintenance Commands.
ATTENTIONContents
Static Sensitive
Handling
Precautions Required
 TSW ACT lamp on the new card 
goes OFF.
 TSW ACT lamp on the new card 
remains OFF.
System Changeover
 Replaced TSW: STBY to ACT
 Mate TSW: ACT to STBY
Check the following lamp indications
on the Speech Path block...

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2.3.3 DLKC Card Replacement Procedure
The DLKC (PH-PC20) card is located in Slot No. 08 or 09 within the TSWM. The card’s main function
is to provide all the Attendant/Desk Consoles with information such as termination/answer/release
(abandoned) of ATT calls or idle/busy status of a station via the link of the TSW system. Use the fol-
lowing procedures to replace the DLCK card with a spare.
Note:The system changeover of...

CHAPTER 4 NDA-24238
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Note:
The changeover of speech path system can be performed also by using the CMOD command. For
details, refer to Chapter 8, Maintenance Commands.
ATTENTIONContents
Static Sensitive
Handling
Precautions Required
 TSW ACT lamp on the new card is red.
 TSW ACT lamp on the new card goes 
OFF.
System Changeover
 Replaced DLKC: STBY to ACT
 Mate DLKC: ACT to STBY
Check the following lamp indications on the
Speech Path block...

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2.3.4 PLO Card Replacement Procedure
The PLO (PH-CK16/17/16-A/17-A) card is located in Slot No. 21 or 23 within the TSWM. Used to-
gether with a different direct digital interface circuit card, the card’s main function is to set up the clock
synchronization on the network. In addition, the MUSIC ROM supplies the hold tone to each station
line via the TSW circuit card. Use the procedures below to replace the PLO card with a...

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Note:
After all steps are completed, check the ACT mode of TSW cards, which are in the same switching block
with the replaced PLO. Because the PLO-located MUSIC ROM supplies hold tones only to the TSW
cards belonging to the same switching block, verify all the TSW cards are also in the ACT-mode status.
Refer to Section 12, System Control Procedures, in Chapter 6.
 OPE lamp on the new card is OFF. 
Note
ATTENTIONContents...

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2.3.5 PWR SW Card Replacement Procedure
The PWR SW (PH-PW14) card is located in Slot No. 00 or 01 within the TSWM. The card’s main
function is to supply DC -48V operating power to the same TSWM circuit cards and also DC +5, -5V,
and +12V output power to the MISC slots. Use the following procedures to replace the card with a new
one.
Replacement Procedure
ATTENTIONContents
Static Sensitive
Handling
Precautions Required
...

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

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3. PIM Accommodating Circuit Card Replacement Procedure
This section covers the procedures for replacing circuit cards mounted in the PIM (IMG0/1/2/3).
3.1 Precaution
 Use this procedure to replace a faulty circuit card with a spare or to check a spare card.
 There are functional switches (having set the default switch) on some of the circuit cards to be re-
placed. As for switch setting on the circuit cards, confirm the...