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This is the A.C.’s (Alternating Current) main fuse and provides electrical current protection from outside A.C. fluctuations, as well as
power tube failure damage. Should the FUSE blow, replace it with the same rating in a slo-blo type package. The domestic U.S.
version requires a 2.5 amp slo-blo fuse. A power tube short or failure is often the cause of a blown fuse...Follow the cold
start procedure mentioned in the ON/STANDBY switch section and watch the four EL-84 power tubes as you flip the
STANDBY switch to the ON position. If a power tube is going bad or is arcing you will see it! Flip the STANDBY switch
to Standby immediately and replace the faulty power tube and the FUSE if necessary. If you see nothing abnormal as
you lift the STANDBY switch, it is possible that a power tube shorted temporarily and blew the FUSE. If this is the case
it may work again normally. To be extra safe you may want to replace all four power tubes in the “shotgun” troubleshoot-
ing tradition and save the replaced set as spares.
NOTE: Like tires on a car, spare tubes are always a measure of good insurance. Your DC-3 was carefully constructed with reliability
in mind! Given the proper care and maintenance, it will deliver years of trouble free service. However, any pro guitarist who is out
there gigging will tell you; spare tubes are a must for the fabled cord bag and may someday be worth their weight in gold. Spare fuses
are also a very easy way to insure an uninterrupted performance.
As we mentioned earlier in the Graphic EQ section, this rotary control is used to select the assignment of the 5 assignment of the 5-
Band Equalizer. See Graphic EQ section on page 5 for an explanation of the 5 possible positions of
this rotary control.
This 1/4" Stereo jack allows you control of the EQ and Reverb remotely when a Stereo cable and Mesa Dual Footswitch are
connected. This footswitch is an option and can be ordered by calling us direct, or by contacting your
nearest Mesa/ Boogie Pro Center.
FUSE:
EQ SELECT:
FTSW EQ/REV:
REAR PANEL:
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