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