User Guide

STUDI O TECHNOLOGI ES, I NC.
DRAWI NG NO. DATE PAGE
OF
VCA
VCA
VCA
VCA
VCA
VCA
L
ANALOG
SWI TCHES
M74BD_B
BLOCK DI AGRAM
31162 03/ 17/ 08 01 01
CENTRAL CONTROLLER
MODEL 74
R
C
LFE
LS
RS
L
R
SURROUND
I NPUT A
RELAYS
MUTI NG/
ROUTI NG
OUTPUT A
ALL MONI TOR OUTPUTS
+4dBu NOMI NAL
DATA BUS
8- BI T
MI CRO-
CONTROLLER
DATA
SHARI NG
POWER
+V1
DATA
I NTERFACE
CURRENT
TO/ FROM
CONTROL
CONSOLE
REMOTE
CONTROL
POWER
SUPPLY
+16V
3
OUTPUT B
I NPUTS
OUTPUT A
OUTPUT B SURROUND I NPUT B I DENTI CAL TO SURROUND I NPUT A
STEREO I NPUT A
RELAYS
MUTI NG/
ROUTI NG
& SUPPORT
LOGI C
5. 1 TO
STEREO
DOWNMI X
BUFFER
LEVEL
LI NE DRI VER CONTROL
DI FFERENTI AL
TRI M
( - 12dBV TO +6dBu)
LI NE RECEI VER GAI N BUFFER
ADJ USTABLE DI FFERENTI AL
OUTPUT A
OUTPUT B
ROUTI NG
MUTI NG/
RELAYS
OUTPUT A
OUTPUT B
RELAYS
MUTI NG/
ROUTI NG
OUTPUT A
OUTPUT B
RELAYS
MUTI NG/
ROUTI NG
OUTPUT A
OUTPUT B
RELAYS
MUTI NG/
ROUTI NG
L
R
STEREO I NPUT B
POWER
SUPPLY
1
+15
+12
+5
- 5
- 15
POWER
SUPPLY
2
+V1
AC MAI NS
FACTORY CONFI GURABLE
FOR 100, 120, or 220/ 240V
50/ 60Hz OPERATI ON
FUSE
+V2
AUX TB
I NPUT
ANALOG
SWI TCH
8- STEP
LEVEL
CONTROL
ANALOG
SWI TCHES
( - 12dBV TO +6dBu)
( - 12dBV TO +6dBu)
A/ D I N
A/ D I N
POWER
MODULATOR
2
3
1
[ +27VDC W/ L CH AUDI O @- 10dBu NOMI NAL]
[ R CH AUDI O @- 10dBu NOMI NAL]
OUTPUT TO
TALENT AMPLI FI ERS
+V2
L
R
L
R
C
LFE
LS
RS
L
R
CUE OUTPUT
A/ D I N
I R RECEI VER I NPUT
TO A/ D I NPUT
FROM TALENT AMP
DATA
I NTERFACE
+12I R
+12I R
OPTO-
COUPLED
TB AUDI O
REMOTE TB
( XLR- M)
( +4dBu)
D/ A OUT
( 3. 5mm J ACK)
( 9- PI N D- SUB)
R
T
S
( 9- PI N D- SUB)
TO MONO
STEREO
DOWNMI X &
BANDPASS
I NPUTS
GPI
OUTPUT
2
L
R
C
SUB
LS
RS