9.0 Service and
Contact Information
Maintenance and Tube Life
Because of the exceptional build quality of the
Vt-747sp, the unit will perform for many years
to come. Like any musical instrument, it
needs care and maintenance to keep it in top
shape.
Vacuum Tube Replacement
For peak performance, Avalon Design
recommends changing these tubes every
5000 hours of run time. Changing the tubes
every two years is recommended assuming
use of 8 hours per day, 7 days per week. A
matched set of replacement tubes can be
purchased directly from your local dealer or
Avalon. Avalon only recommends Sovtek
6922 vacuum tubes for your Vt-747sp.
Replacement of tubes should be performed
by an authorized Avalon technician.
Meter Calibration and Alignment
The VU meter can be easily adjusted to 0 VU
when no signal is present. To adjust the VU
meter to zero:
1. Turn the unit on
2. Let unit warm up for at least 30 minutes
3. Unplug all inputs
4. From the front of the unit use a small flat
head screwdriver to turn the recessed trim pot
so that the needle reads zero.
External Cleaning
The Vt-747sp can be cleaned using an
ordinary mild house cleaner such as 409 or
Windex. Do not use abrasive cleaners or
petroleum-based solvents. Doing so could
cause damage to the finish.
Contact Information
Avalon Design
PO Box 5976
San Clemente, CA 92673
Tel: 949-492-2000
Fax: 949-492-4284
Email: [email protected]
Website: www.avalondesign.com
Page 32
Avalon Vt-747sp Operation Manual
Service Information
AVA L O N D E S I G N
