One Systems POPS SUBa User Manual
Page 17

3. Verify that AC mains levels are within the required range. 
 
Voltage measurements on the AC Mains should be performed by a licensed 
electrician or individual trained in making high voltage measurements. 
 
NO SOUND 
 
1. Verify that signal is present on the input of POPSSub. 
 
2. Verify that there is AC Mains voltage on the AC Mains input to the POPSSub 
 
3. If AC Mains voltage is present, verify that POPSSub’s fuse is not blown. 
 
NOTE: IF THE FUSE IS BLOWN, REPLACE ONLY WITH THE SAME TYPE OF 
FUSE. THIS FUSE TYPE IS NOTED ON THE INPUT PANEL NEAR THE FUSE 
HOLDER. THE LOCATION OF THE FUSE HOLDER IS SHOWN BELOW. 
 
 
 
FUSE HOLDER
The fuse holder is a waterproof design. Insure that the gasket is properly seated 
when replacing the fuse. Insure that the fuse holder cover is securely tightened. 
DO NOT OVER-TIGHTEN THE FUSE HOLDER’S COVER. 
 
PRODUCT SERVICE 
There are NO user-serviceable parts inside the POPSSub. NOTE: See section 
below titled “Replacement of Components” for woofer servicing. 
