PrimaLuna USA ProLogue Five - Manual (Page 9)

9
Fuse Protection
A note on fuses: If "someone who knows" tells you to wrap fuses with aluminium foil to avoid wasting
money on new ones, it's best not to take his advice. Fuses are safety valves. They should always be
replaced with the exact same value and type.
Warning: Never attempt to check or replace a fuse while the amp is plugged in. Turn it off and unplug
all speakers, components and AC cords before continuing. Wait 10 minutes to let tubes cool down and
the circuit to fully discharge.
Plate Fuse:
The plate fuse is located inside the amp, on top of the Adaptive AutoBias™ board. To replace it,
remove the bottom plate using a Phillips #2-type of screwdriver. The fuse is located in a small plastic
case on the end of the Adaptive AutoBias™ board. Refer to the pictures on this page. Remove the top
cover. The fuse will be held on by the cover. Remove it by twisting the fuse out of the holder. Replace
with a 1Amp slow blow 5 x 20 mm fuse. The cover will snap back into place. Re-install bottom plate of
the amp.
Mains Fuse:
The mains fuse is located on the rear of the amplifier, just below the power
cord socket (see picture on this page). The fuse rating is 5Amp slow blow 5 x
20mm for 100-120VAC and 3Amp slow blow 5 x 20mm for 200-240VAC .
Replace with the same type and value fuse! The fuse holder can be snapped
out using a small slotted flat blade screwdriver.
PrimaLuna ® ProLogue Five