OPERATIONAL INSTRUCTION1/154 31-CNZ 214 173 Uen K

© ERICSSON TELECOM AB 1994 All Rights Reserved

CP FAULTContents

1 Introduction 1.1 Scope

2 Procedure 2.1 Prerequisites 2.2 Actions

3 Additional Information 3.1 Cabinet and Power Control Units for APZ 212 20 3.2 Subracks for APZ 212 25 3.3 Cabinet and subracks for APZ 212 30 and APZ 212 33 3.4 Actions when Intervention Preparation is not Successful 3.5 Intervention in CP and MAU 3.6 Handling of POUs of CPUM 3.7 Repair of Power Distribution 3.8 Handling of Checksum Error in the DS Stored Microprogram

4 Glossary

5 References 5.1 Operational Instructions 5.2 Command Descriptions 5.3 Printout Descriptions

1   Introduction

1.1   Scope

This Operational Instruction concerns alarm handling.

The document describes the actions to take when a CP FAULT alarm is received.

This Operational Instruction must be performed within a maximum of one week, or sooner, after the alarm has been received depending on the alarm class of the alarm.

If more than one fault is present at the same time, repair the faults in the same order as they are listed in printout CP DIAGNOSIS .

Some steps in the procedure must be performed on site.

2   Procedure

2.1   Prerequisites

2.1.1   Conditions

The following conditions must apply before this procedure can be completed:

A CP FAULT alarm is received. A CHECKSUM ERROR IN DS STORED MICROPROGRAM alarm is not received. See

also Section 3.8 .

2.1.2   Data

No data is necessary for this procedure.

2.1.3   Special Aids

The following special aids are required to complete this procedure:

Grounding wrist strap (LYB 250 01 or equivalent) Board extractor handle (LTD 117 02 or equivalent) with button (LTD 117 12 or

LTD 117 14 or equivalent) Digital Multimeter (DMM) Pen-type (ZTE 370 08, ZTE 370 05, ZTE 370 07, or

equivalent) Torque driver, size 20 (LSS 101 01 and LSA 126 01/20 or equivalent)

2.2   Actions

Check if RP BUS FAULT

1. Print active alarms.

Use command ALLIP.

Printout:ALARM LIST

2. Is there an RP BUS FAULT alarm present?

Yes Go to Step 3 No Go to Step 8

Check CP state

3. Print CP working state

DPWSP;

Printout:CP STATE

4. Is SBSTATE = WO ?

Yes Go to Step 5 No Go to Step 8

Repair RP BUS FAULT

5. Go to Operational Instruction RP BUS FAULT .

Perform the steps in that Operational Instruction, and return to Step 6 in this Operational Instruction.

Check if CP FAULT

6. Print active alarms.

Use command ALLIP.

Printout:ALARM LIST

7. Is there a CP FAULT alarm present?

Yes Go to Step 8 No Go to Step 40

Specify Starting Position

8. Where does the repair start?

Operation and Maintenance Centre (OMC) Go to Step 9 .On site Go to Step 13

Diagnose Fault

9. Initiate a diagnosis of the fault:

REPCI;

Printout:CP DIAGNOSIS

Note: The printout is received within a maximum of 2 hours (normally less than 10 minutes).

10. Determine the fault-suspected Printed Circuit Boards (PCB).

Note: See printout CP DIAGNOSIS received in Step 9 . The repair is made by replacing the suspected PCBs with spare PCBs. If the fault is temporary, do not replace PCBs that have been replaced within the last 30 days.

11. End the diagnosis:

REPCE;

Printout:COMMAND EXECUTED

Order Local Repair

12. Order a local repair beginning with Step 13 . Attach information to advise which PCBs are fault-suspected.

Diagnose Fault

13. Initiate a diagnosis of the fault:

REPCI;

Printout:CP DIAGNOSIS

Note: The printout is received within a maximum of 2 hours (normally less than 10 minutes).

14. Was any fault indicated?

Yes Go to Step 17 .No Go to Step 15 .Note: See the TEST RESULT column in printout CP DIAGNOSIS from Step 13 .

Initiate Repair Check

15. Remove the fault mark from the Central Processor (CP):

RECCI;

Printout:CP REPAIR

Note: The printout is received within a maximum of 2 hours (normally less than 10 minutes).

16. Go to Step 40 .

Specify Fault Type

17. Which fault type is specified?

Permanent Go to Step 19 .Temporary Go to Step 18 .Note: See the FAULT TYPE column in printout CP DIAGNOSIS from Step 13 .

18. Have all the fault-suspected PCBs been replaced in the last 30 days?

Yes Go to Step 36 .

No Go to Step 19 .Note: See the REPLACED column in printout CP DIAGNOSIS from Step 13 .

Prepare Fault-Suspected PCB Replacement

19. Select the most fault-suspected PCB.

Note: Select the most suspected PCB not replaced during this repair attempt according to printout CP DIAGNOSIS from Step 13 . If the fault is temporary, do not select any PCB replaced during the last 30 days.

20.

Caution!

Removal and replacement of PCBs with the power on may cause service interruption and equipment damage.

21.Prepare to replace the PCB:

22. Use command REMCI.

23. Printout:CP MANUAL INTERVENTION

24. Note: 25. Locate the PCB within the subrack by information in printout CP MANUAL

INTERVENTION from Step 20 and from pictures in Section 3.2 and in Section 3.3

Replace Fault-Suspected PCB

21.

Warning!

Removing or inserting a PCB without wearing a grounding wrist strap can damage the equipment.

22.Follow the procedures in printout CP MANUAL INTERVENTION from Step 20 to replace the fault-suspected PCB.

23. Note: 24. For more information on repair action see Section 3.4 , Section 3.5 .

Initiate Repair Check

22. Initiate a repair check:

RECCI;

Printout:CP REPAIR

Note: The printout is received within a maximum of 2 hours (normally less than 10 minutes).

23. Was the repair check successful?

Yes Go to Step 24 .No Go to Step 28 .Note: See printout CP REPAIR received in Step 22 .

24. Is the power off in the CPUM in the Central Processor Standby (CP-SB) side?

Yes Go to Step 25 .No Go to Step 40 .

Prepare for Repair Check of CP-SB

25. Turn on power to the CPUM in the Central Processor Standby (CP-SB) side. Use the POU ON/OFF key in the CP subrack. See figures in Section 3

Initiate Repair Check

26. Initiate a repair check:

RECCI;

Printout:CP REPAIR

Note: The printout is received within a maximum of 2 hours (normally less than 10 minutes).

27. Was the repair check successful?

Yes Go to Step 40 .No Go to Step 28 .Note: See printout CP REPAIR received in Step 26 .

Prepare Reinstallation of Fault-suspected PCB

28.

Caution!

Removal and replacement of PCBs with the power on may cause service interruption and equipment damage.

29.Prepare to reinstall the original PCB:

30. Use command REMCI.

31. Printout:CP MANUAL INTERVENTION

29. Is the PCB to be reinstalled a POU?

Yes Go to Step 30 .No Go to Step 32 .

Reinstall Original POU

30.

Danger!

Do not use a grounding wrist strap when handling POUs since this activity involves work with hazardous voltage.

31.Follow the procedures in printout CP MANUAL INTERVENTION from Step 28 to reinstall the original POU.

32. Note: 33. For more information on repair action see Section 3.4 , Section 3.5 .31. Go to Step 33 .

Reinstall Original PCB

32.

Warning!

Removing or inserting a PCB without wearing a grounding wrist strap can damage the equipment.

33.Follow the procedures in the printout CP MANUAL INTERVENTION from Step 28 to reinstall the original PCB.

34. Note: 35. For more information on repair action see Section 3.4 , Section 3.5 .33. Is repair of a temporary fault in progress?

Yes Go to Step 34 .No Go to Step 35 .

34. Go to Step 13 .

Check if All Boards have been Replaced

35. Have all fault-suspected PCBs been replaced?

Yes Go to Step 36 .No Go to Step 19 .

Print Error Data for CP

36. Print a list of errors in the CP:

Use command DIRCP.

Printout:CP EVENT RECORD

Print Error Data for RPs

37. Print the error data for all Regional Processors (RP). Set parameter RP to ALL :

Use command DIRRP.

Printout:RP EVENT RECORD

Terminate Repair Procedure

38. Terminate the repair procedure for the CP:

REPCE;

Printout:COMMAND EXECUTED

39. Collect all printouts made during the repair and consult the next level of maintenance support. Further action is outside the scope of this Operational Instruction.

Job Completed

40. Make a report

Note: See Operational Instruction Report of Finished Work .

41. The job is completed.

3   Additional Information

3.1   Cabinet and Power Control Units for APZ 212 20

Figure 1    APZ 212 20. Equipped Cabinet

Figure 2    APZ 212 20 Equipped cabinet, compact version.

Figure 3    Allocation and front view of POWC in CPU subrack

3.2   Subracks for APZ 212 25

3.2.1   APZ 212 25 with RP-busses connected to the CPU subrack

Figure 4    Front view of APZ 212 25 CPU subrack

3.2.2   APZ 212 25 with external RPH subrack for each CP-side

Figure 5    Frontview of APZ 212 25 CPU subrack

Figure 6    Example of frontview of RPH subrack

3.3   Cabinet and subracks for APZ 212 30 and APZ 212 33

Figure 7    APZ 212 30 and APZ 212 33 Equipped cabinet

Figure 8    CPU subracks

Figure 9    CPU subracks back view

Figure 10    Example of frontview of RPH subrack

3.4   Actions when Intervention Preparation is not Successful

If printout CP MANUAL INTERVENTION shows that intervention preparation is unsuccessful, some other fault must be repaired first.

Select another fault-suspected PCB, then enter command REMCI with parameters indicating the new PCB.

It is not possible to replace a board in the EX-side without first making the EX-side SB.

If it is not possible to make a parallel start, function change has to be used to make a side switch.

3.5   Intervention in CP and MAU

Instructions on how to execute manual intervention are printed in printout CP MANUAL INTERVENTION . Follow these instructions exactly, otherwise, major traffic disturbances may occur at manual intervention in the CP side or in the MAU.

When repairing the MAU, use the POU ON/OFF key in CP-SB to disconnect or connect power to CP-SB.

When repairing the MAU, the Central Processor Executive (CP-EX) must be in Forced Executive (FEX) state before manual intervention in the MAU subrack occurs. If the CP-EX is not in the FEX state during the repair of the MAU after power in the CP-SB has been disconnected according to instructions in printout CP MANUAL INTERVENTION , consult an APZ expert on how to proceed with the repair.

If the CP is equipped with lamps to indicate in which part of Central Processor Subsystem (CPS) intervention is permitted, one lamp is used to indicate that intervention is permitted in the A-side of the CP and another lamp is used to indicate that intervention is permitted in the B-side of the CP or in the MAU subrack.

If the CP is equipped with lamps on every board the lamp on the board which is pointed out in the command REMCI is on.

If the fault which shall be repaired is of such a kind that it has an effect on the function which controls the lamp, the lamp might not be on.

3.6   Handling of POUs of CPUM

When the POUs of CPUM are switched on, the leftmost POU must be switched on first. The rest of the POUs can be switched on in any order. The POUs can be switched off in any order.

3.7   Repair of Power Distribution

Normally, each POU has a lamp that indicates faults.

If the lamp indicates a fault, it is probably a fault in the POU or an inoperative line fuse. Acceptable voltage levels for the -48V test points are between -47V and -51V DC. Acceptable levels for the +5V test points are between 4.75V and 5.25V DC.

There could also be a fault in the circuit breaker or an inoperative fuse in the AXE power distribution cabinet.

If the test point voltage on the POU continues to be incorrect, change the POU.

3.8   Handling of Checksum Error in the DS Stored Microprogram

If alarm CHECKSUM ERROR IN DS STORED MICROPROGRAM is present at the same time as alarm CP FAULT , act on alarm CHECKSUM ERROR IN DS STORED MICROPROGRAM first.

Do not act on alarm CP FAULT until the CHECKSUM ERROR IN DS STORED MICROPROGRAM alarm ceases.