ISP Technologies THETA Head - Manual (Page 11)

10. BOOST
This switch turns on and off the THETA BOOST function allowing up to 6db of boost
of the output level of the amplifier.
11. D-SUB CONNECTOR
Connect the 15-pin D-SUB connector between this connector and the D-SUB
connector on the back of the THETA amplifier.
FUSE REPLACEMENT
1. Use a small screwdriver as shown to slide the fuse
cover out from the power inlet module. The fuse
can be found inside the fuse cover module after it
is pulled out.
NOTE: A SMALL COMPARTMENT IS ALSO PROVIDED
WITHIN THE FUSE COVER MODULE FOR
STORING A SPARE FUSE.
2. After replacing the fuse with another of identical
specifications, push the fuse cover module fully
back into place, ensuring that the fuse has snapped
onto the fuse holder inside the power inlet module.