On unit Running after faulty of "T" power supply, We face abnormality on the "T" Computer, on HMPJ card Yellow, I'am OK LED is ON & Red Activity LED still Off. "T" Section on the auxiliary display is running.

Voting Mismatch data on "T" Computer: FSRT, FSRS1, FSRSU, FSRACC, FSROUT, FSR2, L4QAZ, L83SRX, L20FG1X, L20CB1X, L20VG1X, L20FUX, L20AB1X, L20AAX, L4X1, FX1, FPRG.

Computer Reboot on Unit Running still no Effect.
Following the instruction on GEK-83886 , we already take out any potential loading from another card & remain HMPJ, HXPD & HAIC , but the result is same.

Replace all those three card (HMPJ, HXPD & HAIC) & still using existing PROM , and do "T" computer initialization during unit running result still same.

HCMC card LED on the "C" computer shows normal flickering, replace this card not give solution as well.

On unit shutdown timing we do reboot "T" computer again but we get more bad condition i.e "T" section running on Aux display is off (HMPJ I'am OK LED ON , Red activity LED OFF).

Now I 'am thinking about EPROM problem on HMPJ card (U22 & U23).

I am really appreciate for any opinion or possibility solution

Best Regards

 

>>
Problem: Prom mismatch (U22 & U23).
I can't see this problem happening on a
running unit.

Must have been done for some testing purpose, outside of normal plant operations.

 

Thanks ,

I am very please for any reference to recover from PROM mismatch

Regards

 

Updated Situation:

Problem solved by replacing EPROM U22 & U23 in HMPJ card. Thanks god, finally got this spare from GTC

 

> Problem solved by replacing EPROM U22 & U23 in HMPJ card. Thanks god, finally got this spare from GTC.

Hi GTENG,

I am having a similar problem to a Mark IV in my plant. I think I have accidentally corrupted the data of EPROMs in <C> when I tried to back them up to the PC. The HMPK now won't boot and I am in deep trouble.

The IAMOK LED does not even blink when <C> is powered on. No red LEDs either. Have replaced HMPK, DMPK, HUMB, HXPD and no help

Can you recommend me any help?

Thanks in advance!

 

Hi GPINK,

I can help you with some eproms and Mark IV cards to rectify the issue.
Kindly let me know which is your plant and also share your e-mail id so that i can help you with this situation.

Regards,
Rabhi