11
Tube life varies depending upon
playing style and application. Power
tubes have a much shorter life than
pre-amp tubes which can last for
years. For continued optimum
performance from your amplifier, the
tubes should ONLY be replaced with
the same type tubes as specified on the tube
illustration below.
A simple way to check if the tubes are worn is to
replace the set in your amp with your spare set. (You
do carry spare tubes and fuses, don't you?)
When changing the tubes, ALWAYS unplug the
amplifier and remember THE TUBES ARE HOT!
Either wait for the tubes to cool or use an insulated
oven mitt to remove them from your amplifier.
• First, replace the OUTPUT tubes in the amplifier,
re-bias and listen.
• Next, re-insert the original output tubes and re-
bias. Replace the PRE-AMP tubes and listen.
• Finally, try replacing both the OUTPUT (re-bias) and
PRE-AMP tubes and listen.
If there is a marked improvement in the tone of your
amp at any point in this procedure, leave the new
tubes in your amp and purchase another spare set.
Your Model T's tube compliment consists of:
• Four 6L6GC Tubes (part #053980),
• Two 12AX7A Tubes (part #023572),
(tube locations V1 and V2)
• Four 12AX7WA Tubes (part #013341)
(tube locations V3, V4, V5 and V6).
If the amp is set up but does not
function, check the following items:
• Is the amp power cord properly plugged into an
electrical outlet?
• Is there power to the outlet?
• Is the fuse blown?
• Is the speaker(s) properly connected to the
amplifier?
• Is the amp on standby?
• Are the amplifier VOLUME, TREBLE, MID and
BASS controls above 1?
• Is the instrument volume control turned up?
• Is the instrument plugged into the amplifier?
(Eliminate any effects pedals, disconnect any
effect devices from the effects loop and try
another guitar cord.)
Check under all tube covers to see if the tube
filaments are glowing.
If, after checking all of the above, your amplifier is not
performing correctly, consult your nearest authorized
Fender service center.
Your Model T is covered in genuine
Tolex
®
for long life and lasting good
looks. To clean the Tolex covering,
use a sponge and a light soapy water
solution. Avoid spilling liquids on the
operating surfaces, grill, volume and
tone controls and switches. ALWAYS unplug your
amplifier before cleaning or approaching it with fluids.
COVERING CARE
TROUBLESHOOTER’S CHECKLISTTUBE REPLACEMENT
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