SoundCraft B400 - Manual (Page 23)

B400 Block Diagrams 3.3
MONO R
MONO L
LEFT
INPUT
Option
RIGHT
INPUT
Option
VCA
CONTROL
EXT MUTE CTL
EXT VCA CTL
AUX1
AUX2
AUX3
PEAK LED
2 x 3-INPUT
PEAK
DETECT
OVERPRESS OVERPRESS
OVERPRESS CTL OVERPRESS CTL
CUE CTL CUE CTL CUE CLEAR CUE CLEAR PFL/AFL CTL
PFL/AFL CTL
CUE R CUE R
CUE L CUE L
AFL/PFL
CONTROL
CUE
AUX2 & 3
CIRCUITS ARE
IDENTICAL TO AUX1
PRE
AUX4 RIGHT AUX4 RIGHT
AUX4 LEFT AUX4 LEFT PRE
REMOTE
START 1
REMOTE
STOP 1
RELAY
CONTROL
LOGIC
STUDIO MUTE
STUDIO MUTE
MONITOR DIM
MONITOR DIM
REM COM
REM COM
ON
HF MF MF LF
T0 PEAK DETECT CIRCUIT
T0
PEAK
DETECT
CIRCUIT
T0
PEAK
DETECT
CIRCUIT
3-Band EQ
BAL /
PAN
PAN
BAL /
PAN
PAN HF MF MF LF
T0 PEAK DETECT CIRCUIT
T0 PEAK
DETECT CIRCUIT
T0 PEAK
DETECT CIRCUIT
MUTE
MUTE
ON
LED
METER
PROD T/B
PROD T/B CTL
TALK BUS
SLATE TALK/TONE
SLATE CTL
ON-AIR CTL
CLEANFEED L
CLEANFEED R
CLN RTN L
CLN RTN R
CLEANFEED
MIXES
DIRECT
OUTPUT L
(VIA EDAC)
METER
DIRECT
OUTPUT R
(VIA EDAC)
METER
LEFT FEEDS
ODD GRPS,
RIGHT FEEDS
EVEN GRPS
GRP
-30dBu TONE
8
6
4
2
7
5
3
1
STEREO
ROUTE
ST LEFT
ST RIGHT
EQ
A
B
B
A
TELCO
INPUT
B
(TELCO OPTION)
DIFF
DIFF
TRIM
TONE
RHS
PHASE
METER
RECTIFIER
L/R L
R
REMOTE
START 2
REMOTE
STOP 2 3-Band EQ
HPF
CUT
BOOST
CUT
BOOST
CENTRE
FREQ
CUT
BOOST
VCA
VCA
FADER
FADER
CLOSED
OVER PRESS
OPTION
REDIRECT
- OPTION
TELCO
PRE O/P LEVEL T/B
TELCO
SUB BOARD
(OPTION)
7-8
5-6
3-4
1-2