Before Switching On; Important Safety Instructions - Hamstead Soundworks Artist 20 User Manual

Before Switching On

Ensure that the amplifier is set to the correct voltage for the country it is being used in
and that the correct fuse for that voltage is fitted.
Ensure that the speaker is connected to the correct impedance jack socket. Please note
that valve amplifiers should never be used without the correct load connected.
Always use a high quality shielded instrument cable. Use of low quality cables can
severely compromise your sound.
Switch the amplifier on and allow a few minutes for the valves to warm up before playing.

IMPORTANT SAFETY INSTRUCTIONS

WARNING! Always replace fuses with the correct rating. Never use a higher rated
fuse.
Fuses protect the power supply from faults in the equipment, the equipment from faults
in the power supply, and they also indicate that there is a fault.
The Power Input is protected by a fuse in the IEC Inlet Socket. To access the fuse, first
unplug the power cable from the supply socket and then remove it from the amplifier
back panel. The drawer in the IEC socket contains the fuse and also a spare. The
correct fuse rating is indicated back panel of the amplifier. Artist 20 requires 1AT for
230V and 2AT for 115V. Artist 60 requires 1.6AT for 230V and 3.15AT for 115V.
In the unlikely event that the Power Light is on but the amplifier is not functioning, turn
off the power and remove the mains cable. Wait for 2 minutes and then check the
speaker cable is plugged in and the valves are all secure in their sockets. If the
amplifier still does not function even after replacing the valves, please refer to a
qualified technician. The low voltage and high voltage supplies inside the amplifier are
protected by fuses mounted on the circuit boards along with spares. Access to these is
only possible by removing the chassis from the cabinet.
DANGER! Lethal voltages are present inside the chassis, refer all servicing to a
qualified technician.
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