0000405: The bad serial link problem

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Category

Severity

Reproducibility

Date Submitted

Last Update

0000405

[DZB] 0.unknown/unspecified

major

random

31-05-12 10:32

12-07-12 07:31

Reporter

Yuan Tang

View Status

public

Assigned To

Sjouke Zwier

Priority

normal

Resolution

open

Status

resolved

Summary

0000405: The bad serial link problem

Description

There was the DZB problem which happened at UT18:17 with error message of
   bad IVC band. The system works again after rebooting the DZB. But after that
   The bad serial link (of DDU presel board2,module 0) problem happened 4 times.
   It seems to me it is something new after Tuesday maintenance.

Additional Information

The bad serial link error (of DDU presel board2,module 0)were probalbly caused by overheating.
Because there were 3 fans in the lower fan tray unit just below this board who were not turning.
I have replaced the complete Fan-tray unit.

nr subbands

nr polarisations

nr channels

bandwidth

multi-subarray

recirculation

Attached Files

Relationships

Notes
(0000388) Sjouke Zwier 12-07-12 07:31	Because there were 3 fans in the lower fan tray unit just below this board who were not turning. I have replaced the complete Fan-tray unit.

Issue History
Date Modified	Username	Field	Change
31-05-12 10:32	Yuan Tang	New Issue
31-05-12 10:32	Yuan Tang	nr subbands	=> 1
31-05-12 10:32	Yuan Tang	multi-subarray	=> no
31-05-12 10:32	Yuan Tang	recirculation	=> no
31-05-12 10:32	Yuan Tang	Assigned To	=> Sjouke Zwier
31-05-12 10:32	Yuan Tang	Status	new => assigned
12-07-12 07:05	Sjouke Zwier	Status	assigned => progressing
12-07-12 07:31	Sjouke Zwier	Note Added: 0000388
12-07-12 07:31	Sjouke Zwier	Status	progressing => resolved
12-07-12 07:31	Sjouke Zwier	Additional Information Updated