[Search for users] [Overall Top Noters] [List of all Conferences] [Download this site]

Conference netcad::hub_mgnt

Title:	DEChub/HUBwatch/PROBEwatch CONFERENCE
Notice:	Firmware -2, Doc -3, Power -4, HW kits -5, firm load -6&7
Moderator:	NETCAD::COLELLADT

Created:	Wed Nov 13 1991
Last Modified:	Fri Jun 06 1997
Last Successful Update:	Fri Jun 06 1997
Number of topics:	4455
Total number of notes:	16761

2055.0. "DEChub900 PINWIP/SEATING??" by NEWOA::GATHERN () Tue Feb 28 1995 06:03

    I wonder if anyone can assist me with my problem. I am a MCS site res
    engineer here at the Newbury office. One of my customers is Business
    Protection Services(Disaster Recovery).
    
    They have recently installed a DEChub900 Multiswitch, and we are having
    a few problems with it. It manifests itself in the following way:-
    
    DEChub working fine everything powered up OK.
    Remove DS900TM to move to another slot...it fails to power up. Reseat it
    several time with no success.
    Moved DS900TM back to original slot...it still fails to power up. 
    Tried suspect DS900TM in a DEC Onehub...works OK.
    Moved DS900TM back to original slot in DEChub......works OK
    
    Several days later:-
    DEChub working fine everything powered up OK.
    Remove DS900TM to move to another slot...it fails to power up.
    Reseat it several time with no success.
    Power DEChub down
    Remove ALL modules and PSU's and reseat
    Powered up ok ...all modules ok
    
    Several days later:-
    DEChub working fine everything powered up OK.
    Remove DS900TM to move to another slot...it fails to power up.
    Reseat it several time with no success.
    Removed suspect DS900TM and left over w/end.
    Inserted DS900TM back in it's original slot ..powered up OK
    
    Late yesterday I removed and reinserted the DS900TM and it failed to
    power up. Tried it in slot 2 ..still no power.
    
    Indications on the LED Display
    Power Status  N+1
    System Power 15.0W
    
    Available Power 205.0W
    5V:47.0A 15V:8.0A
    
    This morning, whilst waiting for a new backplane to arrive, I removed
    an unused DECrepeater 900TM from slot 5 and the "dead" DS900TM in slot
    2 sprung to life and powered up ok!!
    Moved the DS900TM back to slot 5 ..powered up OK
    Put a spare DS900TM in slot 2 ..powered up OK.
    
    The current configuration is as follows:-
    
    1....DECrepeater 90FA
    2....DS900TM
    3....DECpacketprobe 90
    4....DS900TM
    5....DS900TM
    6....DECrepeater900TM
    7....DECrepeater900TM
    8....DECswitch 900EF
    PSU's x 4
    
    Power Status N+1
    System Power 15.0W
    
    Available Power 177.5W
    5V:43A 15V:7.5A
    
    It has the latest MAM firmware 3.1.0.
    
    Is this the "pinwipe" (seating?) problem that is mentioned in several
    earlier notes, or is there another problem?.
    Will changing the backplane solve the problem, or will it be a pointless 
    exercise?.
    Did the ECO/FCO to solve the"pinwipe" problem ever come out?. 
    
    The customer has also reported a loss of firmware info on the DS900
    status display on the MAM. It sometimes fails to reprt what firmware
    version the DS900 is running even though it recognise that there is a
    DS900 present.
    Are these problems connected?.
    
    Sorry to go on for so long, but I hope for some inspiration from you
    "GURU's" out there
    
    
    				Dave

T.R Title User Personal
Name Date Lines

2055.1 NETCAD::GERHARDT Out of Control Tue Feb 28 1995 13:05 11

T.R	Title	User	Personal Name	Date	Lines
2055.1		NETCAD::GERHARDT	Out of Control	`Tue Feb 28 1995 13:05`	11
	! Is this the "pinwipe" (seating?) problem that is mentioned in several ! earlier notes, or is there another problem?. this could be a pin wipe problem. other problems could be a bad cable that interconnects the MAM and the matrix board. For a period of time manufacturing was incorrectly positioning the cable inside box. the finger stock on the cover would cut into the cable. I have also seen the problem go away by changing a power supply ( they sit on the same bus).

!    Is this the "pinwipe" (seating?) problem that is mentioned in several
!    earlier notes, or is there another problem?.
    
    this could be a pin wipe problem.  other problems could be
    a bad cable that interconnects the MAM and the matrix board. 
    For a period of time manufacturing was incorrectly positioning the
    cable inside box.  the finger stock on the cover would cut into the
    cable.  I have also seen the problem go away by changing a power
    supply ( they sit on the same bus).