Fender Machete - Tube Replacement; Tube Information Label; Hum Balance Adjustment; Tube Replacement Safety Precautions

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The tube information label is located on the inside wall of the amplier cabinet and
includes tube location and hum balance adjustment location information.
HUM BALANCE ADJUST — This control is located on the bottom side of
the amplier chassis as shown on the tube information label. Should any tubes be
replaced, use this adjustment to minimize the hum heard from the amplier while
at rest (not being played). Turn both GAIN knobs {C and G} all the way down. Turn
both VOLUME knobs {D and H} and both LOW knobs {E and I} all the way up. Turn
all other channel knobs to 50% rotation. Select channeltwo. Use a small at-head
screwdriver to adjust this control until hum is at a minimum. Select channel one. If
the hum is not less than channeltwo, try replacing the V2 tube.
!
IMPORTANT SAFETY INFORMATION — Replace and secure
the back cover after replacing tubes.
To use MIDI for effects loop and reverb bypass:
No set up is required. Use the same MIDI channel as used to
select Machete channels in the section above. For the effects
loop, send a change message on MIDI continuous controller
#85. (0 to 63 is effects loop bypass, 64 to 127 is effects loop
on.) For reverb, send a change message on MIDI continuous
controller #84. (0 to 63 is reverb bypass, 64 to 127 is reverb on.)
Notes on using MIDI:
1. You can re-enter MIDI Learning Mode to reassign
ChannelOne, Channel One Boost, and Channel Two.
2. MIDI bank select messages are ignored, so the MIDI
program change commands are not “bank-able.”
3. When in MIDI Learning Mode, the Machete footswitch will
continue to function, but changes made by the footswitch
will not be “remembered.”
4. To erase all MIDI assignments in the Machete, press and
hold either the "+/–" switch or the "CH 2" switch while
turning on the amplifier. Release the switch.
Z. FOOTSWITCH  Plug the included footswitch in here to
enable remote switching functions (see page ).
AA. PARALLEL SPEAKER JACKS 
Connect speaker enclosures, then set the LOAD IMPEDANCE
switch {BB} accordingly.
!
A speaker must ALWAYS be connected to one of the SPEAKER
jacks when the amplifier is on or damage may occur to the unit.
BB. LOAD IMPEDANCE  Set this switch to match the total load
impedance of the speakers you have connected, according to
the table below. The internal Machete speaker is .
IMPEDANCE
SPEAKER SPEAKER TOTAL SWITCH
ONE TWO IMPEDANCE SETTING
Ω + None = Ω 
Ω + Ω = Ω 
Ω + None = Ω 
Ω + Ω = Ω 
Ω + None = Ω 
!
Switch the amplifier to "STANDBY" {P} or switch the power to
"OFF" {O} while changing speaker connections.
• TUBE REPLACEMENT •
• TUBE INFORMATION LABEL •
• REAR PANEL (CONTINUED) •
Your new Fender® amplifier comes equipped with the
highest quality tubes available, sourced from various
manufacturers all over the world. Because of occasional
irregularities in supply, the specific tube type used in each
amplifier is subject to change without notice.
When replacing output tubes, please note the specific tube markings
on the original tubes factory supplied with your amplifier. For example,
6L6 output tube types used by Fender include, but are not limited to: 6L6C; 6L6CQ;
6L6RD, etc. The installation of a different type may require significant adjustment
by a qualified technician to avoid reduction in performance and tube life.
Additionally, Groove Tubes® tests and sorts many of our output tubes based on
their measured performance. The sorted tubes are marked with a label on the
base with coarse ratings of BLUE, WHITE, & RED plus fine ratings of 1-10. If your
amp came supplied with, for example, a pair of matched 6L6 power tubes ranked
at WHITE-6, then any pair of 6L6 power tubes marked with a course rating of
WHITE will be a good replacement. If the tube replacements are marked as
WHITE-6, they will be a perfect direct replacement.
If you have questions or concerns, contact your Fender dealer or authorized
service center.