
Chapter 8: Troubleshooting  
 
Series SPB Audio Boosters Manual, Revision A 
8-10
 
1.  Check that the 1/2W EOLR is in place is UL Listed 10k Ohm ½ EOLR. 
2.  Check the wiring to STB1 OUT terminals and make sure that there’s no open circuit. 
3.  Troubleshoot the strobe circuit for incorrect wiring.