Yamaha MG12/4FX Service Manual

MG12/4FX
32
3.4 Frequency Characteristics
In the signal routes of the Table 3.3-1 to 3.3-6 indicated with q to !0, the 20Hz and 20kHz frequency response of each
output shall be within the range of 0 dB +1/-2.5 dB compared to the 1kHz (0dB).
The 20Hz level when the GAIN volume is Max shall be within the range of 0 dB +1.0/-4.5 dB compared to the 1kHz
(0dB).
In the route q, check every OUT when the signal is fed to CH1, and check only the ST L OUT when the signal is fed
to CH2 and other channels.
In the route r, check only the ST L OUT and the ST R OUT.
3.5 HPF
In the state of the Table 3.3-1 and 3.3-2, feeding 80 Hz -36dBu signal, and setting the GAIN to MIN, the STEREO L OUT
level obtained when the 80 switch is set to ON shall be within the range of -3dB +2/-2 dB compared to the level obtained
when the switch is set to OFF.
3.6 Channel Equalizer Characteristics
In the state checked in 3-2 above, check the output level obtained at GROUP 1 OUT in the case of CH INPUT and ST CH
INPUT L and at GROUP 2 OUT in the case of ST CH INPUT R when LO, HI and MID of INPUT are moved respectively.
Its level of each frequency shall be within the range specified in the table 3.6-1 compared to the output level obtained
when the EQ gain control is center click position.
If it is without the range, search the frequency, within the range of ±20%, of that the level is within the range of Table
3.6-1.
＊ InmeasuringtheC-ROUTL/RandPHONESL/Rlevel,settheC-R/PHONESOutputandMeterSelectswitchto2TRIN.
Table3.3-2[dBu]
INSERTOUT
INPUT INPUTLevel Gain
1-4
RECOUTL RECOUTR
Mic1-4 -80 Max -20±2 ー ー
CHINSERTIN1 0 Unspecified
Unspecified
ー +2.2±2 +2.2±2
CHINSERTIN2-4 0 ー +2.2±2 ー
Table3.3-3InputTerminalSTEREOIN[dBu]
AUX
INPUT
INPUTCH
INPUT
Level
Gain STLOUT STROUT GROUP1 GROUP2
PREOFF PREON
EFFECT C-ROUT

＊
2
-80 Max 0±2
＊1
0±2
＊1
+3±2 +3±2 +8±2 -2±2 +8±2 -1±2Mic 5/6,7/8
-36 Min +1±2
＊1
ー ー ー ー ー ー
5L,7L +3±2 ー ー ー ー ー ー PHONEJACK 
6R,8R
-54 Max
ー +3±2 ー ー ー ー ー
e
r
w
Table3.3-4InputTerminalSTEREOIN[dBu]
AUXINPUT
INPUTCH
INPUT
Level
STLOUT STROUT GROUP1 GROUP2
PREOFF PREON
EFFECTC-ROUT

＊
2
9L,11L +4±2 ー +4±2 ー +3±2 -7±2 +3±2 0±2 PHONEJACK 
10R,12R ー +4±2 ー +4±2 +3±2 -7±2 +3±2 ー
9L,11L +4±2 ー ー ー ー ー ー ーPINJACK
10R,12R
-30
ー +4±2 ー ー ー ー ー ー
y
t
Table3.3-5InputTerminalRETURNL,R[dBu]
INPUT INPUTLevel STLOUT STROUT AUXOUT
L/MONO +16±2 +16±2 +15±2
R
0
ー +16±2 +9±2i
u
Table3.3-6InputTerminal2TRINL,R[dBu]
INPUT INPUTLevel STLOUT STROUT C-ROUTL C-ROUTR PHONESL PHONES
R
L 0±2 ー 0±2 ー -11.5±2 ー
R
-27.8
ー 0±2 ー 0±2 ー -11.5±2
o
!0
w w w . x i a o y u 1 6 3 . c o m
Q Q
3
7
6 3
1 5 1 5
0 9 9
2
8 9
4 2
9 8
T E L 1 3 9 4 2 2 9 6 5 1 3 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3
Q Q
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Yamaha MG12/4FX Specifications

General

Brand	Yamaha
Model	MG12/4FX
Category	Music Mixer
Language	English