Stirton.M
11-02-2010, 02:51 AM
Just recently had to deal with an issue with a C5501 in which the control panel had a failure in the display....see attached image for an example....
6947
After some investigation, it was determined that either the control panel was at fault, or the OACB was at fault. Being that the control panel was infinitely easier to replace, that was done first obviously...but there was very little difference. The next stage was to replace the OACB...Overall Control Board.
After the billion or so screws to remove and replace the board, I made my first discovery. Some here might already know this, but I suspect some do not. To save you the pain of figuring this out yourselves and wasting a bunch of time in the process....
The OACB on any given machine, be it a C6500 or C6501 or C5501 and so forth, is part number identical in the model group. It is also, for all intents and purposes, brain dead prior to mating with a machine. Meaning there is no code firmware at all installed on it.
I had a board that originally came from a C6501. It was a good board, a problem we had in the past that did not get corrected by replacing this board did not resolve that problem. However, what I did not know was that when that board mated with the C6501 and firmware was applied, that board became forever linked to that model, always to be a C6501 OACB. It will not work properly in a C6500 nor a C5500 or a C5501. It will constantly throw a C131 code.
Actually, it threw a C130 code first. I updated the ROM and the board accepted the code, but upon reboot, tossed the C131. The TSB indicates that I1 and C, the first 4 digits of the firmware number should match each other. The TSB mentions reflashing the control, but this does not work.
Long story short, do not waste time trying another OACB unless that board was once in the same model as the machine you are trying to fix. If that is not possible, the only alternative is to replace the board with a new board.
Which brings me to the second tip.
The machine will boot up completely brain dead, with the message on the control panel displaying "Please wait...."
The machine will not progress further. Holding the utility key and powering up will not get you into tech rep. The only alternative is to use ISWTrns on a laptop/computer and push the firmware via cable over the USB port or parallel port.
I was able to use the USB cable method. Once it was done, and I closed the program, and the machine rebooted on its own. I got another C131 code, but this time I was able to use the USB thumb drive to push the Control firmware (which was changed from the previous attempt at using a different model programmed OACB.)
After that, easy sailing.
So to recap...don't waste time with replacing the OACB with a different machine's OACB unless they match model type....C5501 in a C5501. Unless you are troubleshooting the display issue I had illustrated above. Simply give it a brand new board where possible and carry on from there with the USB cable and ISWTrns software.
6947
After some investigation, it was determined that either the control panel was at fault, or the OACB was at fault. Being that the control panel was infinitely easier to replace, that was done first obviously...but there was very little difference. The next stage was to replace the OACB...Overall Control Board.
After the billion or so screws to remove and replace the board, I made my first discovery. Some here might already know this, but I suspect some do not. To save you the pain of figuring this out yourselves and wasting a bunch of time in the process....
The OACB on any given machine, be it a C6500 or C6501 or C5501 and so forth, is part number identical in the model group. It is also, for all intents and purposes, brain dead prior to mating with a machine. Meaning there is no code firmware at all installed on it.
I had a board that originally came from a C6501. It was a good board, a problem we had in the past that did not get corrected by replacing this board did not resolve that problem. However, what I did not know was that when that board mated with the C6501 and firmware was applied, that board became forever linked to that model, always to be a C6501 OACB. It will not work properly in a C6500 nor a C5500 or a C5501. It will constantly throw a C131 code.
Actually, it threw a C130 code first. I updated the ROM and the board accepted the code, but upon reboot, tossed the C131. The TSB indicates that I1 and C, the first 4 digits of the firmware number should match each other. The TSB mentions reflashing the control, but this does not work.
Long story short, do not waste time trying another OACB unless that board was once in the same model as the machine you are trying to fix. If that is not possible, the only alternative is to replace the board with a new board.
Which brings me to the second tip.
The machine will boot up completely brain dead, with the message on the control panel displaying "Please wait...."
The machine will not progress further. Holding the utility key and powering up will not get you into tech rep. The only alternative is to use ISWTrns on a laptop/computer and push the firmware via cable over the USB port or parallel port.
I was able to use the USB cable method. Once it was done, and I closed the program, and the machine rebooted on its own. I got another C131 code, but this time I was able to use the USB thumb drive to push the Control firmware (which was changed from the previous attempt at using a different model programmed OACB.)
After that, easy sailing.
So to recap...don't waste time with replacing the OACB with a different machine's OACB unless they match model type....C5501 in a C5501. Unless you are troubleshooting the display issue I had illustrated above. Simply give it a brand new board where possible and carry on from there with the USB cable and ISWTrns software.