Yamaha GF12/12 Schematic Diagram

PHANTOM
+48V
INSERT I/O
PHANTOM
0dB
+48V
INPUT A PAD HA 3 Stage EQ
HPF
1-20
80
{1-12}
{1-8}
INPUT B 26dB GAIN
A
*1,*3
3 Stage EQ
HA
(MONO)
HPF
B
80
INPUT A
3 Stage EQ
*2,*4 HA
HPF
80
*1,*3
INPUT B
*2,*4
No. GF12/12 GF16/12 GF24/12
*1 9L 13L
21L
*2 10R 14R 22R
*3 11L 15L 23L
*4 12R 16R 24R
(MONO)
AUX RETURN 1
(MONO)
AUX RETURN 2
+20 dB
PAD 26 dB ST INPUT
GAIN Min (+10 dB) GAIN Min (+10 dB)
+10 dB
AUX RETURN (+4 dB)
INSERT I/O (0 dB)
0 dB
–10 dB
PAD 0 dB
Ch Fader
GAIN Min (–16 dB)
–20 dB
–30 dB
PAD 26 dB ST INPUT
GAIN Max (–34 dB) GAIN Max (–30dB)
–40 dB
–50 dB
PAD 0 dB
GAIN Max (–60 dB)
–60 dB
GROUP AUX
1 2 3 4 1 2 3 4 5 6
PEAK
to ST
ST
1-2
PAN
ON 3-4
AUX 1
AUX 2
AUX 3
PRE
AUX 4
AUX 5
PRE
AUX 6
to PFL/AFL
PFL
to ST
PEAK
ST
GROUP OUT 2-4:
Same as GROUP OUT 1
ON
1-2
BAL
3-4
AUX 1
AUX 2
AUX 3
PRE
AUX 4
AUX 5
PFL
to PFL/AFL PRE
AUX 6
L
GROUP 1
R
GROUP 2
AUX OUT 2-6:
AUX 1
Same as AUX OUT 1
AUX 2
to ST
ST
PFL
to PFL/AFL
L
GROUP 3
R
GROUP 4
AUX 3
AUX 4
to ST
ST
PFL
to PFL/AFL
AUX (–6 dB)
GROUP, AUX
ST
L
to Meter
PAN
TO ST
GROUP OUT 1
to PFL/AFL
AFL
1-20
(L)
Ch Input {1-12}
(R)
{1-8}
Ch Input *1,*3
from
Ch Input *2,*4
L
AUX RETURN 1, 2
R
AUX OUT 1
to PFL/AFL
AFL
L
TAPE IN ST ON
R
GROUP OUT, AUX OUT (+4 dB)
TAPE IN (–10 dBV)
R
ST
INSERT
I/O L
L
ST
STEREO
INSERT
I/O R
R
L
REC OUT
PAD
R
AFL
MONO
POST MONO
1-20
Ch Input {1-12}
{1-8}
Ch Input *1,*3
Ch Input *2,*4
from AUX RETURN 1, 2
GROUP OUT
AUX OUT
STEREO OUT, MONO OUT (+4 dB)
ST INSERT I/O (0 dB)
REC OUT (–10 dBV)
MONO
PFL/AFL
L R
from GROUP OUT 1
from GROUP OUT 2
from GROUP OUT 3
OUT
from GROUP OUT 4
METER SELECT
OUT
L
R
(odd)
(even)
(odd)
(even)
BA
L
C-R MONITOR
TAPE IN
LEVEL C-R OUT
BA
R
BA
PHONES
PHONES
LEVEL
BA
+20 dB
+10 dB
C-R OUT (+4 dB)
0 dB
PHONES (3 mW, 40*)
–10 dB
–20 dB
–30 dB
–40 dB
–50 dB
–60 dB