We have a Frame-6B power plant with Mark4 Turbine Control that has a diagnostic that appears to be self explanatory, but wanted some confirmation or to hear if any others have had this happen.
We had to power down the Mark4 control system for upstream power system maintenance. We turned off each power supply, R-S-T-C and 2 for IO, before powering down the system. After about a week of downtime, we powered it back up, with fingers crossed as usual.
The main displays show a diagnostic alarm as follows:
Primary eeprom changed, not backed up
Diagnostic alarm see display
The diagnostic page shows this:
CC002 eeprm 1 <c> cksm fail humb2k u28, 30
I powered down C core and checked all the ribbon cables and reseated the cards. We had a spare HUMB card but no new eeproms so we swapped the eeproms onto a new card, set all the berg jumpers, just to rule that out but the same diagnostic comes in.
It looks like eeprom U28 and U30 are bad. are these the only 2 eeprom that I need to change? (all others seemed to pass the test as I saw them scroll through the start up page.)
I am unfamiliar with this system and am concerned about wiping the existing memory so it looks like we need new eeproms and someone familiar with changing them out. I read that there is a specific method for backing up the memory and replacing the eeprom without wiping all the data.
Am I overlooking anything? Can anyone comment about any similar experience? Anybody have an field service people that may be up for this? Any idea where to get eeproms?
We had to power down the Mark4 control system for upstream power system maintenance. We turned off each power supply, R-S-T-C and 2 for IO, before powering down the system. After about a week of downtime, we powered it back up, with fingers crossed as usual.
The main displays show a diagnostic alarm as follows:
Primary eeprom changed, not backed up
Diagnostic alarm see display
The diagnostic page shows this:
CC002 eeprm 1 <c> cksm fail humb2k u28, 30
I powered down C core and checked all the ribbon cables and reseated the cards. We had a spare HUMB card but no new eeproms so we swapped the eeproms onto a new card, set all the berg jumpers, just to rule that out but the same diagnostic comes in.
It looks like eeprom U28 and U30 are bad. are these the only 2 eeprom that I need to change? (all others seemed to pass the test as I saw them scroll through the start up page.)
I am unfamiliar with this system and am concerned about wiping the existing memory so it looks like we need new eeproms and someone familiar with changing them out. I read that there is a specific method for backing up the memory and replacing the eeprom without wiping all the data.
Am I overlooking anything? Can anyone comment about any similar experience? Anybody have an field service people that may be up for this? Any idea where to get eeproms?
