Hello,

I have a TMR Mark VIe system upgraded from Mark VI.
On the <R> rack, the VSVO H1b card's RUN green LED is off. Also the PCMI card on the same rack, has the ATTN red LED blinking. the rest of the cards on the same rack have the RUN led blinkink synchronized.

Even stranger is the fact that in the toolbox, there is no diagnostic alarm on the rack nor on the VSVO card.

Any ideas on how to troubleshoot?
Can I replace the card with the powerplant online?
Whould it make any sense to retract the VSVO card and put it back in?

thank you all!

 

HI jimleg,
I think this is the Mark VI control system, not VIe. Because in VIe we have IO packs, not VME cards.
In the Alchemy, the IO card replacement procedure is available.
Also check the power board PCMI from where the VME card get the power, may be the power is lost from the PCMI board and VME card is fine.

 

Thanks for your answer.

It is a Mark VI upgraded to Mark VIe.
On the left side of the rack there is a VCMI card which is connected via red ethernet cable to the Mark VIe controller. (sorry, the pic is blurry).

The thing is that, since the run LED of the VSVO if constantly off, and the ATTN led of the VCMI card on the left is blinking, I would expect to find a diagnostic alarm in the toolbox related to the VSVO and on the rack where this card is placed.

However, I didn't find any relevant diagnostic alarm which is strange to me since it looks like the card is either faulty or off power.

Has anyone ever faced a similar issue? i.e a card with the run LED off but without any diagnostic alarm on the Toolbox?
if so, what was the cause?
I could obviously replace the card or the power supply. But i would really like to know if someone faced the same or similar issue with success.

Thank you again!

 

1.) If ToolboxST did not report any error, then could it be LED indicator failure ?
2.) Playing with Servo / VSVO on line is not recommended. You could end up in a trip.
3.) Probably at shutdown, try a reboot of both PCMI & VSVO. Many times it will help. If not get in touch with OEM for further support.

 

Thanks for your answer.

It is a Mark VI upgraded to Mark VIe.
On the left side of the rack there is a VCMI card which is connected via red ethernet cable to the Mark VIe controller. (sorry, the pic is blurry).

The thing is that, since the run LED of the VSVO if constantly off, and the ATTN led of the VCMI card on the left is blinking, I would expect to find a diagnostic alarm in the toolbox related to the VSVO and on the rack where this card is placed.

However, I didn't find any relevant diagnostic alarm which is strange to me since it looks like the card is either faulty or off power.

Has anyone ever faced a similar issue? i.e a card with the run LED off but without any diagnostic alarm on the Toolbox?
if so, what was the cause?
I could obviously replace the card or the power supply. But i would really like to know if someone faced the same or similar issue with success.

Thank you again!

If the RUN LED is off with no diagnostic alarm, I’d first carefully reseat the VSVO, check backplane connections, and confirm power rails are in spec. It can also be a firmware or configuration mismatch. For comparison, when working with audio ICs such as TDA8950TH, small supply or feedback issues can cause similar ‘dead but no fault’ symptoms.

It does sound like either a power-distribution issue on that section of the rack or a partial communication loss that ToolboxST isn’t catching. Since the VCMI ATTN LED is blinking, I’d start by checking the VCMI → PCMI power path and the backplane voltages on that slot. A VSVO with RUN off but no diagnostic is rare but can happen if the card isn’t fully powered or the backplane connector is oxidized.

If you can, compare VSVO slot voltages with a healthy rack. Reseating the card during a shutdown only is safe practice don’t do it online with a servo module. Also reseat the VCMI and inspect the backplane pins. If the symptom stays with the slot, the issue is likely PCMI/backplane; if it follows the card, then the VSVO is indeed failing.