Mesa/Boogie pmn - Manual (Page 15)

CHANNEL SELECT:
This switch simply allows you to switch between the two channels (CHANNEL 1 and CHANNEL 2) without
using the Channel Select Footswitch or, when one is not available.
To use the footswitch however, the Channel Select switch must be in the (up) position.
FUSE:
This is the A.C.’s (Alternating Current) main fuse and provides protection from outside A .C. fl uctuations 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 power tubes as you fl ip 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 might
want to replace just the adjacent tube or all power tubes in the “shotgun” troubleshooting
tradition and save the replaced set as spares. Spare fuses are a must for the fabled cord
bag along with your spare tubes. Always carry both for they could be worth their weight in
gold someday.
A.C. RECEPTACLE:
The total power consumption for the RECT-O 50 is 2.5Amps @ 120 Volts. Thus, a 15 Amp circuit (which is
what most house circuitry is wired with) is adequate. Make sure the Euro style A.C. power cord is fi rmly seated in the power receptacle
before powering up the unit. Always connect the A.C. cord to a 3 terminal grounded socket. If none are available, connect the A.C.
power cord to a ground lift adaptor and then connect to a 2 terminal outlet. This may also be
necessary from time to time for noise problems.
This style of power cord will make tear-downs and cable routing a lot easier and save you time
as well. If you should ever need a replacement, just call and we’ll be happy to send you another
one for a nominal charge or visit your nearest MESA/Boogie Pro Center.
MESA/Boogie MESA/Boogie
CHANNEL 1
CHANNEL 2
SET TO CHANNEL 1
TO USE FOOTSWITCH
HEAD VERSION
WARNING:
Unplug power
before replacing
fuse or removing
bolts mounting
chassis.
FUSE
F US E
POWER FUSE
2.5 A
SLO
BLO 120 V~
50-60 Hz
2.5 A
POWER FUSE
FUSE
PATENTED 4,211,000 & OTHERS PENDING FOR SOLO, MUTE & LOOP CONFIGURATION
WARNING:
Unplug power
before replacing
fuse or removing
bolts mounting
chassis.
POWER FUSE
2.5 A
SLO
BLO
120 V~
50-60 Hz
2.5 A
POWER FUSE
HEAD VERSION
PAGE 11
REAR PANEL:
(Continued)