CP Fault

CPUB-B was halted due to the CP fault therefore there was no redundancy of CPs.If the only CPU,CPUB-A failed then the whole BSC was going to fail.

<dpwsp;

CP STATE

MAU SB SBSTATE RPH-A RPH-B BUA STATE

AAM B HA-FM - - 1

PROBLEM SYMPTOMS

A3/APZ "ZWBSC06_G13B_IP" 244 141216 1436

CP FAULT

REMEDY CONDITIONS 1. CPUB board was faulty.

2. CPUB-B was halted.

3. CP fault was evidenced by commands:(i) ALLIP:ALCAT=APZ;

ALARM LISTA3/APZ "ZWBSC2_G13B_IPA" 033 150723 2044 CP FAULT

(ii) dpwsp;

CP STATE

MAU SB SBSTATE

NRM B WO

END (4) Perform CP diagnosis:

-Checking faulty board-CPUB-B

repci;

<repci;

REPCI;

<;

ORDERED

<

WO ZWBSC2_G13B_IPA06 AD-440 TIME 150806 0915 PAGE 1

CP DIAGNOSIS

TEST RESULT

FAULT

FAULTTYPE

PERMANENT

MAG PCB REPLACED REASON

CPU STUD-B-0

CPU POWC-B

END

(5) End CP diagnosis

REPCE;

(6)Peform backup:

-Check System Functions Backup

SYBFP:FILE;

-Passivate the automatic output function. SYBUE;

-Initiate the output of a system backup copy: SYBUP:FILE;

-Initiate the updating of backup generations for a consecutively numbered sequence of backup files within the same file range SYTUC;

-Initiate a rotaion of the system backup to RELFSW0 SYBFP:FILE;

-Activation of automatic system backup:SYBUI;

SOLUTION(S) NB: PLEASE REPLACE ONE BOARD AT A TIME

(1) Initiate CP manual intervention in CPUB of the board POWC-B

<REMCI:MAG= CPU,PCB=POWC-B;

(2) Replace POWC-B board with spare one

(3) Initiate CP manual intervention in CPUB of the board STUD-B-0

REMCI:MAG= CPU,PCB= STUD-B-0;

(4) Replace STUD-B-0 board with spare one

(5) Synchronizing the hardware configuration table with the magazine.

Hwcsync

(4) Checking fault state of CP

recci;

RECCI;

<;

ORDERED

<

COMMAND SESSION SUSPENDED

CP REPAIR

SUCCESSFUL

END

(5) Checking CP status(dpwsp;)

<dpwsp;

CP STATE

MAU SB SBSTATE RPH-A RPH-B BUA STATE

NRM B WO - - 1

END

(6) Printing recorded information about hardware faults in the Central Processor

DIRCP;

(7) Printing the hardware identities of all the boards in the CP.DPHIP;

(8)Checking processor loadPLLDP;

END