C.E.C. TUBE53 Owner's Manual page 16

• The TUBE53 should not require any periodic maintenance, and contains
no user serviceable parts except for the vacuum tubes and fuse. If the
surface of the TUBE53 is soiled, wipe with a soft cloth or use diluted
neutral cleaning liquid. Be sure to remove any fluid completely. Never
use thinner, benzene or alcohol as these may damage the surface of the
unit.
• If the FUSE located below the AC INLET is broken, gently pull the box
with a small flat screwdriver. Replace the FUSE with a new one. Replace
the box inside the unit.
If the new FUSE continues to break after replacement, there may be a
malfunction with the internal circuitry. In this case, please contact the
dealer where the TUBE53 was purchased, or an authorized service center
to arrange for repairs.
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