D.W. Fearn VT-I/F - Manual (Page 23)

D.W. FEARN
VT-I/F Vacuum Tube Instrument Interface
25
TROUBLESHOOTING
Most problems will be traced to defective vacuum tubes. However, if normal
tests do not easily reveal the problem, feel free to call the factory for assistance. If
you lack access to a qualified service technician with vacuum tube equipment
repair experience, you may return the VT-I/F to the factory for repair. Call first,
however, for shipping information.
WARR ANTY REPAIR
If the VT-I/F should develop a problem during the five-year warranty period,
call the factory for return shipping instructions. We will repair and return your VT-
I/F quickly. Note that the warranty does not cover vacuum tubes, which must be
periodically replaced.