ALLEN & HEATH GL2800, Service Information

Page: 71 / 74

METER
GRP1
MIC/STEREO INPUTS x2
+
+
R
-
+
GAIN
-
L/M
STEREO LINE
48V
2= +
MIC
PHANTOM POWER
1-2
L-R
FADER
BAL
+
4 BAND EQUALISER
EQ IN
LM
HM
HF
SUM
3-4
LF
0dBu
MIC OUT
RING= -
TIP= +
(break jack)
POL
MIC/MONO INPUTS
48V
HPF
LINE/PAD
-20dB
GAIN
-
+
TIP= SEND
RING= RETURN
2= +
MIC
TIP= +
BALANCED
LINE
0dBu
INSERT
EQ IN
SL
SYS-LINK CONNECTION
PF
L/
A
FL
AU
X 1
-10
GR
P 1-8
M
METER
4 BAND EQUALISER
PHANTOM POWER
AUX OUT
TIP= +
-2dBu
+4dBu
2 = +
GROUP OUT
L-R
METER
+4dBu BAL OPTION
BAL
PAN
MUTE
IMPEDANCE BALANCED
GRP (TO MATRIX)
TIP= +
MATRIX OUT
IMPEDANCE BALANCED
-2dBu +4dBu BAL OPTION
AUX
+10dB boost
AUX MIX
GRP/AUX REV
SL
INSERT
-2dBu
GRP MIX
SL
L-R
3-4
1-2
PAN
PRE PRE
2 3
5
4
6
FADER
HM
HF
LM
LF
TIP= +
DIRECT OUT
IMPEDANCE BALANCED
RING= -
0dBu
1 AUX
MUTE
GRP3
GRP2
FROM GRP 1-8
GRP5
GRP6
MATRIX MIX
GRP7
GRP4
GROUPS / AUX 1-8
FADER
+10dB boost
MATRIX 1-4
LEVEL
+6dB boost
GL2800
PRE-INSERT, PRE-EQ
POST-FADE
PRE-FADE A
B
POST-FADE
+
+
PRE-FADE
8 7
5-6
7-8
LR
M
M4
M3
M1
M2
M
U
TE 1-4
-20dB
LINE/PAD
+
-
HPF
POL
GAIN
MUTE
M
7-8
5-6
M2
M1
M3
M4
M
PFL
PFL
AFL
AFL
1 2 3 4
0dBu
MUTE
GRP8
EXT IN
M
R
L
FROM LRM
TB
Off to +20dB boost
9-10
PAN
PRE
C D
SW POST
JUMPER E
PR
PR
E JUMPER
POST SW
D C
PRE
BAL
9-10
7 8
AUX 1
6 4 5 3
2
PRE PRE
INPUT ST2(4)
L/M
-
GAIN
+
-
R
+
LR
CH
INPUT ST1(3)
L/M
R
GAIN
+
SUM +
PFL
MUTE
FADER
F
G
PRE-FADE
2 1 AUX 9-10
POST-FADE
+
M
L-R
1-2 (3-4)
+
SUM
SUM
DUAL STEREO RETURN x2
WEDGE DIM
M4
M3
M2
M1 MUTE MASTERS
M
PRESS TO TALK
AUX3-4
L-R
AUX1-2
MTX3-4
MTX1-2
H J
TB/OSC
IMPEDANCE BALANCED
TB/OSC OUT
ON
48V PHANTOM POWER
OFF
MIC IN
TALKBACK
BALANCED
2= +
+
-
GAIN
PINK NOISE
1kHz OSC
ON
LEVEL
DIM
LATCH
AUX5-8
AUX9-10
LRM / AUX 9-10
SL
AUX9-10 MIX
+10dB boost
AUX9-10
IMPEDANCE BALANCED
+4dBu BAL OPTION
METER
-2dBu
TIP= +
AUX9 OUT
AUX10 OUT
TIP= +
-2dBu +4dBu BAL OPTION
IMPEDANCE BALANCED
SL
MUTE
SL
LR MIX
SL
INSERT
-2dBu
-2dBu
INSERT
MUTE
MUTE
+4dBu
2 = +
LEFT OUT
BAL
BAL
RIGHT OUT
2 = +
+4dBu
FADER
+10dB boost
L
R
AUX9 (TO MONITOR)
AUX10 (TO MONITOR)
L (TO MATRIX, MONITOR, MONO)
R (TO MATRIX, MONITOR, MONO)
M
INSERT
-2dBu
SL
M MIX
WEDGE MODE
MUTE
+4dBu
2 = +
MONO OUT
BAL
M (TO MATRIX, MONITOR)
LR/AUX9-10 REV
+
LR TO MONO
PFL/AFL
AU
X9
-1
0
2TRK TO LR
2-TRACK
FROM L,R
SL
PFL/AFL MIX
PFL/AFL DC
SL
TO WEDGE MODE
R
L/M
L
R
RETURN
-2dBu
SEND
IMPEDANCE BALANCE
R
L
MONITOR OUT
R L
MONITOR
MONITOR
RING = RIGHT
TIP = LEFT
PHONES OU
3
2
FROM P/AFL MIX
MTX4 MTX3 MTX2 MTX1 2T
RK
L-
R
M
TO MONITOR
FROM M
FROM MATRIX
FROM AUX9-10
MTX1-2 MTX3-4
ALL UP = P/AFL ONLY
TB WEDGE DIM
1
GL2800
SYSTEM BLOCK DIAGRAM