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Power
This is your main power switch. The on position is indicated by the light being
illuminated. The off position is marked by the "0" on the switch. Before turning the amp
on, always check that a speaker is connected and that the power cord is firmly plugged into
the amp and the outlet.
Rear Panel
Mains Input
Your RIVERA amp has a detachable power cord that connects to the chassis AC connector
labeled Mains Input. Always use this cord and, in the event that the power cord requires
replacement, replace it with the same type of power cord. Consult your RIVERA dealer for
further information. Be sure to use a grounded electrical mains power supply socket
whenever possible. These outlets have a grounding pin in addition to the normal line and
neutral pin. The power cord supplied with your RIVERA amp has a 3-pin plug. Do not cut
off or damage the ground pin. If the available electrical outlet is of the older 2-pin type, use
a suitable ground-lift adapter.
The U.S.A., Canada, and Japan share a common CSA/UL-style cord. Most of Europe and
Scandinavia utilize a Euro plug and have a SEMKO/VDE-style cord. Australia uses a
different type of plug, as does England, and South Africa as well.
Note: Avoid using long power extension cords. Long cords have sufficient resistance to
electrical current that the voltage arriving at your amp can be significantly reduced. This
can have a bad effect on your tone.
Mains Fuse
This AC line fuse protects your amplifier from damage due to shorts, momentary surges,
and defective power tubes. In the event of a fuse failure, always replace it with the same
type of fuse.
Note: Always turn the amp off and wait about five minutes before replacing a fuse. This
allows the parts to cool and high voltages to dissipate.
For 100VAC versions, the Mains Fuse is: 3 Amp, 250 Volt Slo-Blo type (size 3AG, or
MDL)
For 115VAC versions, the Mains Fuse is: 3 Amp, 250 Volt Slo-Blo type (size 3AG, or
MDL)
For 230/250VAC versions, the Mains Fuse is: T 1.6A (time-delay, 5mm x 20mm size)
HT Fuse
The power amplifier circuit has its own fuse for protecting the output section from short
circuits and transient current peaks that exceed the normal current draw. These conditions
are usually caused by a bad tube. When a short circuit or transient peak causes the fuse to
blow, the output tubes should be checked and replaced, if necessary.