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Knowledge Base

The power supply is not steady then OSN3500 18-GSCC report HARD_BAD and POWER_ABNORMAL alarm

Publication Date:  2012-07-24  |   Views:  152  |   Downloads:  0  |   Author:  Liu Song  |   Document ID:  EKB0000282127

Contents

Issue Description

One OSN3500 GSCC board in slot 18 report HARD_BAD and POWER_ABNORMAL.

Alarm Information

HARD_BAD; POWER_ABNORMAL

Handling Process

Check the power supply with costomer, the problem ocurred on customer's PDB failure, the voltage is not steady. After fix this problem, the HARD_BAD and POWER_ABNORMAL are cleared.
      

Root Cause

We collect the data from the equipment, the parameters of the alarms are:
335965 18 POWER_ABNORMAL MJ start 2007-3-25 16:35:58 None 0x07 0x00 0x01 0x01 0xff 
335964 18 HARD_BAD CR start 2007-3-25 16:35:58 None 0xff 0xff 0xff 0x01 0x00
For HARD_BAD alarm, para(4) = 1, it meas board in position fault, anyhow physical board and logical board report said board is in slot 18, para(5)= 0, it means a problem in power supply module -3.3V
For POWER_ABNORMAL alarm:para(4)=1 , it means 3V bak fault, para(5)= ff, it not defined.
So it seems like a power supply problem.
      

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