Laney Alliance VC50 User Manual page 8

MODEL VC50/VC100/VH100R
VC50/VC100 REAR PANEL
POWER FUSE HT FUSE
21
22 23
VH100R BACK PANEL VH100R BACK PANEL
EFFECTS LOOP EFFECTS LOOP
A+B
SEND RETURN RETURN RETURN
CLEAN CHANNEL A OVERDRIVRE CHANNEL B
This fuse protects the DC power within the amplifier. Use only the correct size and rating fuse as
HT FUSE:
specified on the panel. If a fuse blows or fails and a replacement of the same size and rating is installed and it in
23
turn blows, the amplifier has suffered a malfunction, at this point check the output valves and replace faulty one if
required. Should the valves not be the problem the amplifier should be checked out by a qualified technician. Do
not try using a fuse of greater value. Using fuses that are too large in current rating may cause serious irrepairable
damage to the amplifier. Fuses are designed in to PROTECT, DO NOT take chances.
1
EXTENSION SPEAKER SOCKET:
24 When an extension cabinet is connected the resultant impedance will be 4 ohms and the speaker impedance
switch should be set to 4 ohms. Mismatched impedance will reduce tha amplifiers performance and in some cases
may cause damage to your amplifier.
IMPEDANCE SELECTOR SWITCH:
25
using with the 'on board' speaker set to 8 ohms. When an 8 ohm extension cabinet is also connected, set to 4
ohms.
26
INTERNAL SPEAKER SOCKET:
extencion cabinet connected ensure that switch (5) is set to 8 ohms.
POWER AMP/LINE IN:
27
an effects unit or other pre amplifier. Connection at this point disconnects the internal pre- amplifier. Nominal
level 0dBu.
28
POWER AMP/LINEOUT:
to drive other power amplifiers, FX units or mixing desks. Nominal level 0dBu.
29
BIAS SWITCH:
switch should be re-set accordingly.
30
FOOTSWITCH SOCKET:
supplied with the amplifier. FS4 is a four way switch for remote on both channels and reverb.
RETURN LEVEL:
31
correct mix to be achieved. This may also be used to provide additional pre amp gain for both channels when the
switch is deployed in the insert mode regardless of whether an effect unit is connected or not.
32
RETURN SOCKET:
socket (14)
FX MODE SWITCH:
When the whole of the amplifier signal is required to be directed to an external effect, such as a Graphic Eq the
33
switch should be set to ' INSERT' mode. The 'SIDE CHAIN' mode allows the connection of FX units such as
delays, flangers etc, where a direct signal path is maintained to avoid the normal loss of dynamics through FX
processors. When using this mode any FX unit should if possible be set to 'EFFECT ONLY' mode.
34
FX SEND SOCKET:
(12) & (13). Nominal level 0dBu.
FX LOOP SEND (OVERDRIVE CHANNEL):
35
sending to an external FX processor. Processors fitted here operate in a 'side chain' mode and should be set for
effect only operation if possible. Nominal level 0dBu
4 OHM 8 OHM
LINE
IN OUT
POWER PRE
EXTENSION INTERNAL
AMP AMP
CABINET CABINET
25 26
27 28
24
INSERT
RETURN
LEVEL
INSERT
SIDE
BYPASS RETURN
SEND SEND
CHAIN
Use to connect an 8ohm extension cabinet, model number GS212PE.
This switches the internal impedance setting of the amplifier. When
1/4" output jack factory connected to the 'on-board' speaker. With no
This socket is provided to allow a signal to be fed directly to the power amplifier from
This socket provides an output from the pre-amplifier, post FX loop and may be used
This is factory set to suit the valves fitted (5881). Should you wish to use EL34 valves the bias
This is a 5 pin 180 DIN socket for connection of the dedicated footswitch FS4 as
This control adjusts the signal level returning from an external FX unit and allows the
This is provided to recieve the output of an external FX unit being driven from the send
For normal amplifier operation without FX this should be set to 'BYPASS' mode position.
This provides an output from the pre-amplifier to drive effects units in conjunction with
FOOTSWITCH
6L6
INSERT
5881 EL34
RETURN
BIAS LEVEL
INSERT
RETURN
SIDE BYPASS
CHAIN
29 31 32 33
30
LINE
OUT
IN
6L6
FOOTSWITCH
EL34 5881
PRE POWER
AMP AMP
BIAS
This socket provides an output from the pre-amplifier for
EFFECTS LOOP
A+B
SEND
SEND RETURN RETURN
OVERDRIVRE CHANNEL B
34
35 36 37 38
2x16 ohm
SPEAKERS 2x8 ohm
1x16 ohm 1x8 ohm
1x4 ohm
HT FUSE POWER FUSE
40 41 42
5
EFFECTS LOOP
RETURN SEND
CLEAN CHANNEL A
39