This forum doesn't go back that far (1996, not 1986 BTW)
Originally Posted by rtfm
Although some people here have had the switch. I read extensively on the old Ryobi forum.
The CPSC action reads in part:
All table saws which may have this problem have large rectangular ON/OFF buttons.
In order to turn the saw on, a switch lock-off key (referred to in the owner's manual as a key plate) must be in place around the ON button. In some cases, if the OFF button is not completely depressed, consumers may be able to restart the table saw without the key. As a result, consumers could be accidentally cut or injured.
The saws, weighing 75 pounds each, have a 10-inch blade and a sliding miter table.
The table saws were sold under the brand names and model numbers "Ryobi BT3000" and "Sears Craftsman Model 315.22185."
Various home centers and hardware stores sold the Ryobi saws nationwide starting in May 1991. Sears stores sold the Craftsman saws nationwide starting in July 1994. Both table saws sold for approximately $400 to $600 each.
The table saws have a serial number located on a data plate on the right side of the saw. Consumers who own Ryobi BT3000 10-Inch Table Saws with serial numbers ending in four digits lower than 9608 or Sears Craftsman Model 315.22185 10-Inch Table Saws should call (800) 867-9624 immediately with the serial number of their saw. Replacement switches will be installed without charge. Consumers are also encouraged to confirm full release of the ON button when removing their "lock-off key" and to always remove the plug from its power source when the table saw is not in use.So according to them the switch on-lockout had a safety issue, if you did not fully depress the off button it would turn off the saw but not lockout the on button. You could push the on-button when you thought the lockout was engaged, and the saw would turn on rather than not turn on as the lockout was supposed to ensure. A mechnical issue, not electrical.
There have been a great deal of reports here an on the current Ryobi forums of the BT3100 saw not turning off when the switch was shut off. This, in my opinion as an electrical engineer reading the reports, is due to underdesign of the switch so that the contacts are slightly welded together by the sustaining arc when the current is broken, the spring not being strong enough to pull the contacts apart. CPSC or Ryobi have made no official action on this switch.
These are two entirely separate issues. Your second scenario is correct, I believe. Neither of the BT3000 switches (the two-button one or the later -post '96 red rocker switch with the black cover) ever had an electrical problem, like sticking on.