I am Looking for the how-to on how to program the r-925 eprom/microprocessor so as to not have to reset the unit each time power is lost. The Software needed/wiring schematics of cable needed/ parts list. They shoulda slapped a rs-232 on the back for this purpose lol. I will hehe thanks in advance.
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The software is on an EPROM chip inside.
It can go awry for a number of reasons, including a voltage surge via the earth, coming back from the amp
Always connect everything before powering up your system. If you disconnect to troubleshoot, power down before reconnecting.
Try this if you don't mind losing all your patterns:
Hold down "ERASE", "DELETE", and "RECORD" while you turn power on
This will clear all your memorized patterns & reinitialize the system.
If that doesn't work, the EPROM chip may need to be reprogrammed or replaced.
I was going to advise "Try downloading and installing the Bios update from the manufacturer website. If the programming on the Bios EPROM was corrupted this should resolve the problem. " problem is even if you did this you wouldn't be able to install the update since there is nothing to tell the computer what devices it controls. Even a bad Bios battery will not cause this situation. You could try getting a replacement EPROM of the Bios from the manufacturer but I would either replace the motherboard or take it to a shop that might be able to reprogram the EPROM with the correct BIOS. I haven't priced an actual BIOS chip in a very long time but it should be relatively cheap.
Try opening it and taking out the little coin battery from the moatherboard for about 20 sec or more..put it back in and see if this works first....if it doesnt im not sure you can ...but let me know if this helps!!!
The GE (actually RCA) 31GT660 uses the CTC187 series chassis. This chassis is notorious for bad solder joints on the shields around the tuner and microprocessor. When the solder joints on the shields crack, the microprocessor and EPROM lose their ground and the EPROM's data becomes corrupt. The solder joints on the shields will all have to be resoldered and the EPROM reprogrammed or replaced by a qualified tech familiar with the 187 series chassis.
Sounds like your set has a bad eprom. This is the brain that stores all the settings and sends information to the microprocessor to make things happen. If you do not know how to replace it you should take it to a qualified tech to repair it.