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Maintenance
30
13 Resistors R53 and R54.
14 Fuse F1.
15 Potentiometer for setting the BIAS.
1.
Make sure that the device is turned off, disconnected from the mains and completely
cooled down. The minimum wait time after disconnecting the voltage supply is ten
minutes.
2.
Remove the cover on the reverse and pull the amp out of the housing.
3.
Using a multimeter, check that fuse F1 is OK.
4.
Connect a loudspeaker to the appropriate output and switch the device on using the
main [Power] switch.
Ensure that no instruments are connected to the [INPUT] .
5.
Turn the [Return | Level] controller to "0".
6.
Turn the potentiometer to set the BIAS all the way in a clockwise direction.
7.
Using the [Standby]switch, apply high voltage to the tubes and wait for around a minute
until the tubes have stabilised.
Tube amp head
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