NEC Neax 2400 Imx System Operations And Maintenance Manual
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CHAPTER 5 NDA-24238 Page 324 Revision 3.0 FAULT REPAIR PROCEDURES 2.3 Trunk (ORT, SND, CFT) Fault Note:If a circuit card is replaced because only one line is faulty, no other lines in that circuit card can be used until the replace- ment is complete. When only one line is faulty Place the faulty line into make-busy state. For ORT/SND, set MB switch of each circuit to ON position. For CFT, place it into make-busy state using command MBTK. Replace the circuit card with spare. Set MB switch UP and extract the circuit card from its mounting slot. Set MB switch of the new circuit card UP and insert the circuit card into its mounting slot. Set MB switch DOWN. If the line is under make-busy state, cancel it. AT T E N T I O NContents Static Sensitive Handling Precautions Required START END
NDA-24238 CHAPTER 5 Page 325 Revision 3.0 FAULT REPAIR PROCEDURES 2.4 Trunk (COT, TLT, DTI) Fault Note 1:If a circuit card is replaced because only one line is faulty, any other lines in that circuit card cannot be used until the replacement is complete. Note 2:If the polarities of the external line is reversed, it is detected in the form of Trunk Ineffective Hold. When OPE lamp on the trunk circuit card does not illuminateConfirm that MB switch of the trunk circuit card is in ON position (UP side). Confirm that trunk data (ATRK command) in the trunk circuit card is assigned. Replace trunk circuit card with a spare. When BL lamp is flashing or illuminating on the trunk circuit cardConfirm that MB switch of trunk circuit card is in ON position (UP side). Use MBTK command to confirm that trunk circuit card has not been placed into make- busy state. Check trunk data (ATRK command) assignment. Replace trunk circuit card with a spare.AT T E N T I O NContents Static Sensitive Handling Precautions Required START A
CHAPTER 5 NDA-24238 Page 326 Revision 3.0 FAULT REPAIR PROCEDURES Check the faulty line on the MDF. If the C.O./Tie Line is in Loop Start system: Isolate the faulty line to C.O. side and to the system side. Connect the test telephone to the C.O. side. Note 1:Check can be made only on temporarily opened C.O./Tie Lines.Confirm that Dial Tone (DT) is heard and the call is connected to the desti- nation party at the opposite office. Note 2:Cross connection methods are explained on the following pages.If C.O./Tie Line is any other type than Loop Start: By cross connections on the MDF, connect the faulty line to a normal trunk. By a designated connection from the ATTCON/DESKCON, seize the trunk connected with the faulty line (*E). When the connection is not set up, the C.O./Tie Line is faultyAfter the trunk has been seized, check to see if a call can be originated. When the connection is set up Replace the D term with a spare. AT T E N T I O NContents Static Sensitive Handling Precautions Required A END
NDA-24238 CHAPTER 5 Page 327 Revision 3.0 FAULT REPAIR PROCEDURES Note: When performing loop-back connection tests on the trunks at the user’s office, provide cross connection as follows: (1) For a COT Set up a loop-back connection between the COT (C.O. Trunk) to be tested and station line. The trunk route must be assigned for Loop Start. (2) For a TLT (for DID) Set up a loop-back connection between the Tie Line Trunk (TLT) to be tested and another TLT. If the TLT is a Direct Inward Dialing (DID) Trunk, connect the related leads as shown below: If the TLT is a 4-wire E & M System, connect the related leads as shown below: AT T E N T I O NContents Static Sensitive Handling Precautions Required LC A LC B LC C COT LC ATLT LC BTLT TLTRTLTR TT TLT RR TT M M EERR TT Receive SendTLTReceive Send
CHAPTER 5 NDA-24238 Page 328 Revision 3.0 FAULT REPAIR PROCEDURES If the TLT is a 2W E & M System, connect the related leads as shown below: (3) For a DTI Set up a loop-back connection between the DTI Trunk to be tested and another DTI Trunk as shown below: If the office is the PLO-source office, perform the tests by disconnecting the PLO and M-OSC. The mode of the PLO becomes Self Operation Mode. When the loop-back test is performed at the time of PCM LOSS, FRM LOSS, or MERM LOSS alarm lamp (red) illuminates. If the alarm lamp goes out, the DTI circuit card side is normal. When only one DTI circuit card is to be checked, make the following connections and confirm that no alarm lamps illuminates. AT T E N T I O NContents Static Sensitive Handling Precautions Required TLTR TLTR TT MM EE LC ADTI LC BDTI DTIRR R R T T T T Receive SendDTIReceive Send DTIRB RA TB TAReceive SendLoop-back Cross Connection
NDA-24238 CHAPTER 5 Page 329 Revision 3.0 FAULT REPAIR PROCEDURES 3. ATTCON/DESKCON FAULT This section explains the fault repair procedure when a specific Attendant Console (ATTCON) is in any of the following faulty conditions. No speech can be made. No operations can be made. 3.1 Check Point When repairing an ATTCON/DESKCON fault, consider the following items: (1) Check the cable connections on the backplane. (2) When replacing the ATI circuit card for master ATTCON/DESKCON, the system is placed under Night Mode during replacement procedure. (3) When replacing the master ATTCON/DESKCON, the system is placed under Night Mode during replace- ment procedure. 3.2 ATTCON/DESKCON Control Each ATTCON/DESKCON is controlled from an ATI (PA-CS33) circuit card. The ATI circuit card is con- trolled from the CPU card via the INT on the TSW card. Figure 5-3 shows the control route of the ATI circuit card. The ATI (PA-CS33) circuit card is used as an interface card between the PBX and ATTCON/DESKCON. The card is mounted in Slots 12 or 23.
CHAPTER 5 NDA-24238 Page 330 Revision 3.0 FAULT REPAIR PROCEDURES Figure 5-3 ATT Connector Cabling and Connector Leads Accommodation LT5 LT11 PIM Backplane MDFATTCON/ DESKCONLT11 is used when PA-CS33 is mounted in Slot 23. LT5 is used when PA-CS33 is mounted in Slot 12. 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 47 34 35 36 37 38 39 40 41 42 43 44 45 46 48 BN4801 BN4800 BN4820 BN4821 TAS1B TAS1A BN4810 BN4830 BN4831BN4811 TAS0B TAS0A B2 A2 B3 A3 PA-CS33 Pin Assignment Installation CableInstallation Cablefor ATTCON/ DESKCON #0 for ATTCON/ DESKCON #1 for ATTCON/ DESKCON #0 for ATTCON/ DESKCON #1 #0 - #1 #0 - #1 Rosette Rosette
NDA-24238 CHAPTER 5 Page 331 Revision 3.0 FAULT REPAIR PROCEDURES 3.3 ATTCON/DESKCON Fault Note 1:No speech can be made. Note 2:While replacement of the ATI circuit card for the master ATTCON/DESKCON is in progress, the system is placed under Night Mode. On the ATTCON/DESKCON, LCHK (Lamp Check) key has been pressed but no lamps have illuminated.Check the ATT connector cable between the ATTCON/DESKCON and the PBX. When the OPE lamp of the ATI (PA- CS33) circuit card does not illuminateConfirm that MB switch of the ATI circuit card is in ON position (UP side). Confirm that trunk data (ATRK command) in the ATI circuit card are assigned. Replace the ATI circuit card with a spare. When the BL lamp of the ATI circuit card is flashing or illuminatingConfirm that MB switch of the ATI circuit card is in ON position (UP side). Use MBTK command to confirm ATI circuit card is placed into make-busy state. Check assignment of ATI data (ATRK command.) Replace the ATI circuit card with a spare. When keys cannot be operated Replace the operator’s headset. Replace the ATI circuit card with a spare. AT T E N T I O NContents Static Sensitive Handling Precautions Required START END
CHAPTER 5 NDA-24238 Page 332 Revision 3.0 FAULT REPAIR PROCEDURES Note: No operations can be made. Replace the ATTCON/DESKCON with a spare.Set the MB switch of ATI PA-CS33 circuit card UP. If the circuit card is equipped with a fuse, remove the fuse. Disconnect the CHAMP connector of the ATTCON/DESKCON and replace the ATTCON/DESKCON. If the circuit card is equipped with a fuse, insert the fuse into its position. Set the MB switch of the ATI circuit card DOWN. Confirm the PA lamp illuminates on the ATTCON/DESKCON. AT T E N T I O NContents Static Sensitive Handling Precautions Required START END
NDA-24238 CHAPTER 5
Page 333
Revision 3.0
FAULT REPAIR PROCEDURES
4. UNIT FAULT
This section explains the fault repair procedure in a case where any of the faults shown in Table 5-6 has oc-
curred to all the line/trunk circuit cards mounted in a specific unit. Figure 5-4 shows the range of units.
Figure 5-4 Range of Units Table 5-6 Unit Fault Situation
FAULT SITUATION REFERENCE SECTION
Noise, one-way speech, no tone.
Even if dialing has been made, dial tone does not stop.Section 4.2, Unit Fault - Fault Related to Speech
Dial Tone cannot be heard.Section 4.3, Unit Fault - When Dial Tone (DT)
Cannot Be Heard
MUX card has become faulty and, as a result the CPU has changed
over.Section 4.4, Unit Fault - ACT-Side MUX Card Is
Faulty and System Has Changed Over
FRONT VIEW
TOPU
IMG0
FANU
BASEULPM
MG01
MG00
TOPU
IMG2
FANU
BASEU DUMMY
Unit 2 Unit 3
Unit 0
Unit 1
MG05
MG04
TOPU
IMG3
FANU
BASEU DUMMY
Unit 2 Unit 3
Unit 0
Unit 1
MG07
MG06
TOPU
IMG1
FANU
BASEUTSWM
MG03
MG02
PIM3
PIM2
PIM1
PIM0
00
MUX (PH-PC36) 0 MUX (PH-PC36) 1
PWRPWR
Unit No. = 0/2 Unit No. = 1/3
Slot No.
PIM
01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22 23
Unit 2 Unit 3
Unit 0
Unit 1 Unit 2
Unit 3
Unit 0
Unit 1
Unit 2
Unit 3
Unit 0
Unit 1 Unit 2
Unit 3
Unit 0
Unit 1 Unit 2
Unit 3
Unit 0
Unit 1 Unit 2
Unit 3
Unit 0
Unit 1