Laney CUB HEAD Instrucciones De Operación página 13

• To Change a Tube: switch off the unit and unplug from the mains
supply. Wait for the tubes to cool down. Lay amplifier down on its
front face and remove the protective grille held in place with six
screws. You should now be able to access the underside of the
amplifier chassis. The preamp & output tubes are retained by
spring retainers which must be pulled away before
the tubes will come out, see photo opposite.
(Removal of both tubes can be eased by applying a
slight rocking motion as they are pulled, but
ensure that it is only slight, as the pins can
easily be damaged).
Take care when pushing the new tubes into
place, make sure the pins are all aligned
properly and are located in the valve
base correctly before fully fitting.
• Servicing: The user should
not attempt to service these
products. Refer all servicing to
qualified service personnel.
Wire Retainer
Preamp Tubes
ECC83
Output Tubes
EL84
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