MOD 7a STEREO PROCESSOR
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The MOD 7a system is one of the easiest systems to operate.
The Managaer/Operator of the sound booth should review
the operation instructions to assure that emergency func-
tions are also understood in the unlikely event of an
equipment failure.
TURNING ON THE SYSTEM
The sound engineer who installed the sound system has
provided a way to apply power to the system through a
master power switch or circuit breaker. Also, several of the
individal components in the equipment rack have their
own power switches. Become familiar with all switches or
breakers that control power to the sound equipment.
The MOD 7a is equipped with a power up muting circuit
that allows time for the low level circuits to stabilize before
enabling the processor outputs. This circuit prevents a
turn-on thump from being passed to the auditorium
speakers. However, since most amplifiers are not equipped
with a comparable muting circut for the power down
sequence, it is recommended that the amplifiers be turned
off before the processor to avoid a turn-off thump in the
auditorium.
PROGRAM SELECTION
The automation should be set to select the proper formats
when needed. However, any format may be overriden by
simply pushing one of the Format buttons located on the
front of the MOD 7a.
DEFAULT PROGRAM SELECTION
The MOD 7a can be programmed to power up in any
desired format. While the unit is powered up, set the EX
mode as desired. Then, press and hold the format button for
the desired default format for two seconds. The indicator
light for that format should flash off and on. This indicates a
successful programmed default.
VOLUME LEVEL
The front panel
FADER
control is used to set the system level
for any format. The system was calibrated with the
FADER
at the one oclock position, which is where most prints will
play at a normal level.
MUSIC LEVEL CONTROL
The music level should have been preset by the installer of
the sound system. However, if any change in music level is
desired then the LM (Left) and RM (Right) music level
controls can be turned to change the overall volume level.
These trimpots are located behind the front panel on the
right front of the main circuit board. The front panel is
mounted on hinges and latched by magnets, so a light tug on
the top of the panel should open it for access.
BYPASS SWITCH
The MOD 7a contains an emergency bypass system that will
keep the sound on the screen in the event of a failure of the
processor. This special circuitry is activated by the
BYPASS
switch, which is located behind the front panel on the front
right of the main circuit board. The switch is bright red, and
switching it to the right puts the system in
BYPASS
, to the
left is
NORMAL
mode. During
BYPASS
, sound is pro-
duced only through the Center channel.
BYPASS
uses the same preamp circuitry as normal opera-
tion. The power is supplied simultaneously by the main
supply and a small backup power pack. In the unlikely
event of preamp circuitry failure, the backup system may
not function. If this happens, please contact your service
technician or call the SMART factory.
EX Format
The
EX
function (activated by the button on the front panel)
applies special processing to the Left Surround and Right
Surround channels in
DIGITAL
format. This process
extracts the Center Surround (REAR) channel. If your
system is equipped for EX playback, SMART recommends
keeping EX turned on all the time.
If your cinema is NOT equipped to play in EX format, then
make sure to keep the EX format turned off.
OPERATING INSTRUCTIONS
