3) No source voltage
3) Verify power source
with something you know
works
4) Defective
ON/OFF
power switch
4) Return unit to dealer
or factory for repair
No sound coming from
speaker(s), (no audible
amplifier hum).
1) Master Volume and/or
Over drive control levels
set too low
1)
Increase control
level setting(s) to "4" and
listen
2)Speaker output plug
disconnected
2)Connect output plug to
4 ohm or 8 ohm speaker
jack
3) Instrument
pickup/electronics may
be defective.
3) Unplug cable from
instrument and touch tip
of plug; if hum is heard,
replace instrument with
one known to operate
properly
4) Defective speaker(s)
4)Verify speakers
operate properly using
another amp
5)Volume controls on
your instrument are down
5)Increase settings and
listen
6) Defective center
driver tube
12AX7
6) Replace
1 2AX7
7) Module(s) not installed
in rear of unit
7) Install modules
8)Effects hooked up
backwards
8)Properly hook up
effects with effects loop
9) Defective tube in
module
9)Replace module tube
Loud amplifier hum
1) Instrument connecting
cable
not properly grounded
1)See that connecting
cable is plugged into
instrument
2)EL-34 power tube
shorted
2)Replace EL-34.
Readjust Bias balance
Amp blows a fuse after
several minutes of
operation
1) EL-34 power tube
defective
1) Replace EL-34.
Readjust Bias balance
2) Problem persists
2)Return amp for repair
to dealer or factory
Amp blows a fuse
immediately after it is
switched on
1) EL-34 power tube
defective
1) Replace EL-34.
Readjust bias balance
Distorted sound coming
from only one channel
1)Overdrive control level
set too high
1) Reduce control level
setting
