Hughes & Kettner TrilogyTM - Manual (Page 7)

7
english
Trilogy™ Manual 1.1
Figure 2: Rear panel
Figure 3: Mains socket
2 Rear Panel Connections
and Control Features
2.1 Mains Socket
Trilogy™ ships in two versions rated for 110/120V and
220-240V, respectively. The rating stamped on the mains
socket (figure 3) indicates the version type. Both models offer
two operating voltages that are selected using the voltage
selector integrated in the mains socket. Before connecting
Trilogy™ to the mains power supply, ensure that the mains
voltage matches the voltage rating appearing in the voltage
selector window. This value is legible when the amp is in the
standard operating position, that is, placed right side up.
The upright number indicates the currently selected voltage,
and the inverted number indicates the alternative voltage.
Check also the fuse ratings to ensure they match the ratings
indicated on the rear panel (Figure 2).
x Note:
Voltage selection and fuse replacement may be performed by
experienced service technicians only. Accordingly, the following
notes are addressed exclusively to service technicians!
• Use a small flat screwdriver to remove the voltage selector
from the mains socket.
• If the fuse is defective, replace it with a fuse bearing the spe-
cified rating.
• Turn the voltage selector and insert it back into the port so
that the desired mains voltage rating is legible and appears
at the top left (next to the "Voltage Setting" arrow).
2.2 Anode Fuse
This anode fuse is designed to cut the high-voltage power
supply to the tubes. If it trips, the cause is usually a defective
tube. A sure sign of a blown fuse is that the amp does not render
a signal even though it is connected and set up properly.
Before replacing the blown fuse with a 250 volt/T 630 mA
replacement fuse, ensure the power amp tubes are checked
for defects!
2.3 FX Loop On/Off
Connect the optional Hughes & Kettner
® FS-1 one-way foot-
switch to this jack. A connected footswitch disables the FX ON
button on the front panel.
x Note:
A connected footswitch always has priority. The same goes for
channel switching: The current status of the footswitch prevails
regardless of front panel channel selector settings! The switch
on the front panel is disabled and its LED indicates the status
of the footswitch.
2.4 Channel Select Stageboard
This port accepts the included Hughes & Kettner
® FS-4
Stageboard. The switches on this board select directly the
CLEAN, CRUNCH, LEAD and ULTRA LEAD channels for
added on-stage handling convenience.
2.5 FX SEND, LEVEL and RETURN
FX Send
If you wish to use an outboard signal processor, connect this
jack to your effects processor's input jack.
FX Level
This switch cuts the FX SEND’s output level by 10 dB and
boosts the FX RETURN’s input sensitivity by 10 dB to match
the FX loop to the effect device’s input level. Press this button
when using processors designed to handle instrument levels.
FX Return
Connect this jack to your effects processor's output.