How To: Adjust the Flash Rate for TCL, SBL or PHX Signs
Jul 28, 2020
Remove screws from the cabinet and remove back of sign
Locate dial on the power supply (see photos below)
Turn dial with a 2mm flathead (5/64") to the desired flash rate
Typical factory standard flash rate is 55fpm when the dial is turned all the way to the right.
When the dial is turned counter-clockwise from factory standard position, the flash rate starts at 6fpm and will increase to 300fpm as you continue to turn it counter-clockwise, resulting in the following: