Specifications

Pux Inputs
Channels 7 and 8 are aux level inputs, providing additional input
capabilities for tape recorders, synthesizers, amplified instruments,
background music sources, preamplified phonographs, or other mixers.
These channels have
AiB PAN controls for stereo positioning, VOLUME
controls for setting the channel input mix level, and AUX INPUT phone
jacks. To play a stereo tape, connect the left tape channel to AUX INPUT
7
and set the channel 7 PAN control to A (full counterclockwise). Connect
the right tape channel to AUX INPUT
8 and set the channel 8 PAN control
to
B (full clockwise). If equalization, reverbleffects and monitor are
desired, use two of the first six input channels with proper input
attenuation.
These inputs can also be used for the return signal from an external effects
device (delay, echo, etc.) driven by the EFFECTS OUTPUT.
When an additional mixer (such as the Shure M68, M67 or
SR101) is
connected to channel 7 or
8, the aux channel volume control becomes a
submaster control.
The orange control marks indicate basic or initial settings.
LCD Status lndicotors
POWER-Indicates application of ac voltage to power supply when
rear-panel
ON-OFF switch is turned on.
TEMP WARNING-Lights when unusually high temperature of 70°C
(158°F) is reached on the output transistors. Indication may be due to
blockage of air louvers, dirty air filter, or operating the console at a high
output level with a low load impedance (too many speakers or a
short-circuited output). Indicator will turn off when transistor case
temperature drops below 70°C.
If indicator lights, it is advisable to identify
the cause and make corrections to avoid shutdown.
SHUTDOWN-When indicator is on, both power amplifiers are turned off
(all other circuits remain on). The console may shut down for one of the
following reasons:
(1) excessive temperature due to inadequate cooling
(see TEMP WARNING),
(2) dc voltage on speaker lines due to power
transistor failure (check for this condition by turning the console off,
waiting several minutes, and turning it back on), or
(3) airflow blockage
due to fan failure or air passage obstruction.
Stereo Headphones
A %-inch phone jack is available for connection to a pair of stereo
headphones. The jack is wired to the A and
B power amplifiers. The signal
level to the headphonesfollows the A and
B MASTER volume controls. The
headphones allow the console to be used as a stereo mixer for tape
recording. The speakers can be disconnected to avoid feedback.
IT 7
AUX INPUT 8
-
POWER I
I
SHUTDOWN
SG
STEREO HEADPHONES