No board to offer, but also check the 9.6V supply on the RF tray. It is needed by the SSCB. Also check ALL the fuses in the station power supply.
There should be ample current availability of the 5V supply to run the SSCB. Disconnect any other boards you may have plugged into it, including any expansion tray. The board itself doesn't draw that much power at 14V (probably an amp or two). I've connected +14V and ground to an SSCB on the bench and had it come up, although it does display tons of error codes, most related to the fact that nothing else is plugged in and it has no 9.6V so all the analog circuitry is dead. But at least you can troubleshoot the supply on the bench this way. I recall there are some low-value resistors under the board that form a current shunt. These can go bad, or the foil feeding them can burn up. This is just a fairly simple switching power supply. Should be repairable with a schematic and PCB layout. Bob M. ====== --- On Sun, 11/9/08, k6kusman <[EMAIL PROTECTED]> wrote: > From: k6kusman <[EMAIL PROTECTED]> > Subject: [Repeater-Builder] SSCB MAJOR Problem > To: [email protected] > Date: Sunday, November 9, 2008, 10:36 AM > Hello all. I seem to have a SSCB on my msf that has gone. > well.. tit's > up!. I can boot the station but all that happens is a few > of the led's > willcome onand the display will show 888 for a few moments > then go > blank. It would seem that the SSCB has gone away. I have > checked the > +5v regulated supply and it seem's to be working though > it will load > down to about 3.4v then I put the jumper back in.. Unloaded > it's > showing 4.8v. So.. would it be the 5v supply or?.. To make > life real > simple I was hoping someone would have an extra SSCB p/n > TLN3189A05 > that they would be willing to part with fairly cheap. > Contact me off > list if this is the case. Thanks in advance for any help.
