Marshall JCM 900 4100 Kurzanleitung Seite 9

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Warning: always ensure the output impedance
selector is set to the appropriate impedance for
the load of your setup (speaker cabinets). Never
use this amp without a speaker or load.
9. MODE
Switches between high (100W) and low (50W)
power output.
10. VALVE FUSE (OPV1 – 4)
The 'fail' light will illuminate when power valve
failures are detected in either power valve 1, 4
or both.
In this event the amp will continue to function
on reduced power using only valves 2 and 3.
However, service should be obtained as soon as
possible to prevent premature aging of output
valves 2 and 3.
11. VALVE FUSE (OPV2 – 3)
The 'fail' light will illuminate when power valve
failures are detected in either power valve 2, 3
or both.
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In this event the amp will continue to function
on reduced power using only valves 1 and 4.
However, service should be obtained as soon as
possible to prevent premature aging of output
valves 2 and 3.
12. POWER INLET
The supplied mains power lead is connected
here. The mains input voltage rating that your
amp has been built for is shown on the rear
panel.
Warning: before powering on, ensure the amp
is compatible with the voltage of the mains
supply. If you have any doubt, your Marshall
dealer can help you with this.
13. MAINS POWER FUSE
The correct value of mains fuse is specified on
the rear panel.
ENGLISH
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