4
MODIIC STEREO PROCES-
Electrical power to the other cards in the system is dis-
tributed through this card. The Format Card is where
the STEREO MASTER FADER, MUSIC LEVEL control
and REMOTE/LOCAL volume control switches are
located. The NORMAL/BACKUP switch is also locat-
ed on this card. Flipping this switch to BACKUP gives
an emergency mono center channel. The backup audio
level is set by a multi-turn pot on the Mono/Backup
Card.
There are two jumpers on the
Format Card that select different
defaults. Jumper H3 is used to
select default optical selection for
digital movies (see DEFAULT
OPTICAL SELECTION in the
WIRING HOOKUP INSTRUC-
TIONS section). Jumper H2 is used to select whether or not the 3-D feature
is on or off for Mono mode when the processor is powered on (see dia-
gram). Units are shipped to power up with the 3-D function active. Either
way, the 3-D feature can be activated or disabled by simply pushing the
3-D button on the Format Card. By toggling the 3-D feature on and off, you can hear the dif-
ference the 3-D process makes. If the 3-D feature is activated, the button will remain lit all the
time, but the 3-D “action” is only used in Mono mode and only if the optional 3-D Mono card
has been installed. Without the optional 3-D Mono card, the 3-D button has no effect in Mono
mode. In Stereo, Digital and Music modes, the 3-D “action” is not part of the signal process-
ing.
DUAL PROJECTOR PREAMP CARD:
MOD4x300
There are two stereo solar cell preamplifiers in the
MODIIC. Each preamplifier channel is equipped with
slit-loss correction. The Stereo-optical preamplifiers
on this card increase the incoming level from the
stereo solar cells. Electronic changeover circuitry
between stereo pairs is built on the card to allow use
in dual projector booths. If the MODIIC is installed in
a single projector booth, leave the second projector
inputs unconnected.
The Dual Projector Preamp Card has two solar cell
preamplifier gain controls (marked L1 G, etc.) and two
slit-loss correction controls (marked L1 HF, etc.) for
each projector. There is sufficient gain built into the
preamps for narrow slit optical sound lenses when the
exciter lamp is run at 80% of its rated value. The card
is silk screened to make it easier to see the location of each preamplifier gain and slit-loss correction control pot.
Jumper H3
Jumper H2
