Re: RC-96 Controller Problem The "shot-gun fix" for most of the older ACC Repeater Controllers is to replace the RAM and EEprom Chips along with some of the filter capacitors.
Electrolytic Caps degrade over time and the power bus in this era of controller is pretty darn noisy. At some point in time the glitch noise on the various bus lines can false the logic pretty easily. Newer generation EEprom and Ram chips are better made... anyway. So you get the advantage of the (hopefully) more robust chips with a straight-forward swap out. skipp > DCFluX <[EMAIL PROTECTED]> wrote: > > I had a RC-850 with the original EEprom board, lost one of the chips > and every other word became 'zero' on an ID. Also power surges on the > internal power bus can cause random writes to the eeprom with the > results you are describing. > > On 11/9/07, Bryon Jeffers KØBSJ <[EMAIL PROTECTED]> wrote: > > Eric, > > > > Eproms are only good for so long.. One or more is starting to lose it's > > stored/burned bits. I have not had this happen to an ACC controller but > > other older eprom devices. The last item had a Eprom about ten years old > > in it when it started to go crazy... > > > > Hope this helps! > > > > Bryon KØBSJ > > > > Eric Lemmon wrote: > > > One of the repeaters I maintain has been working perfectly for almost a year > > > since its last checkup. It is a 6m repeater that has a link to several > > > other 6m repeaters, and is controlled by an ACC RC-96 controller. It is > > > powered from a very large commercial UPS that ensures no-break power. > > > > > > One evening, the controller went berserk, for no apparent reason. It > > > started transmitting a string of Morse characters on both the primary and > > > secondary ports: "dit dah dit ... dah dah dah dah dah dah dah dah dah dah > > > ..." for about two minutes. It would then be quiet on both ports for about > > > 30 seconds, and would then repeat. During the brief silent periods, the > > > repeater would operate as a repeater, but the Morse string muted any other > > > audio, once it began. The controller would not respond to my DTMF commands > > > on either the primary or secondary ports. To make matters worse, the > > > telephone line that gives me backup control to knock down the repeater was > > > dead at the hilltop end! I had to make a hasty trip to the mountaintop site > > > to take the beast off the air. > > > > > > As a result of this experience, I am adding a dedicated UHF control link to > > > give me positive control of the repeater. > > > > > > Has anyone else had a similar problem with the RC-96 controller? Note that > > > there is no lithium or similar memory battery inside the box that might go > > > bad. Oddball malfunctions like this can add more gray hairs than I want! > > > Any ideas, case histories, or suggestions will be appreciated. > > > > > > 73, Eric Lemmon WB6FLY > > > > > > > > > > > > > > > > > > > > > > > > Yahoo! Groups Links > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > Yahoo! Groups Links > > > > > > > > >
