Yamaha MM1242 - Manual (Page 9)

6
■ Rear Panel
ON
OFF
AUX SEND +4dB
ST AUX RTN –10dB
STEREO OUT +4dB
R L
L
R
4 3 2 1
9 8 7 6 5 4 3 2 1 12 11 10
12 11 10 9 8 7 6 5 4 3 2 1
MONITOR
OUT +4dB
PHANTOM
4 3 2 1
MIC IN
LINE IN
3 7
6 4
1
2
5
MICROPHONE CABLES AND
MICROPHONES CONNECTION
TO PREVENT HAZARD OR DAMAGE,
ENSURE THAT ONLY MICROPHONE
CABLES AND MICROPHONES
DESIGNED TO THE IEC268-15A
STANDARD ARE CONNECTED.
1 MIC IN connectors
These are XLR-type connectors to connect microphones.
(Pin assignment - 1: GND, 2: hot, 3: cold)
Impedance range is 50
Ω
to 600
Ω
.
Turn the PHANTOM switch ON to apply +48V DC to Pin
2 and 3 of these connectors.
2 LINE IN
These are unbalanced phone jacks used to connect line
sources. (Impedance: 600
Ω
)
3 AUX send jacks
These are unbalanced phone jacks.
(T: hot, R: cold, S: GND)
Nominal output level and impedance is +4dB/600
Ω
.
4 ST AUX RTN jacks
These are stereo type phone jacks.
Nominal output level and impedance is –10dB/600
Ω
.
Usually, the output from effects units such as delay and
reverb are returned to the main stereo mix via these jacks.
However, you can use these as auxiliary inputs.
5 STEREO OUT
These are XLR type connectors used to connect a power
amplifier. (Pin assignment - 1: GND, 2: hot, 3: cold)
6 MONITOR OUT
These are unbalanced phone jacks used to connect
monitor speakers.
You can monitor the following signals:
— Signals available for monitoring —
1. Post-EQ signal
(when the corresponding channel PFL switch is ON)
2. Pre-fader ST signal
(when the corresponding stereo L/R PFL switch is ON)
3. Pre-AUX SEND 3/4-fader signal
(when the corresponding AUX send 3/4 PFL switch is
ON)
7 PHANTOM switch
This switch is used to turn on/off all channels’ phantom
power simultaneously. Set this switch to ON when using
condenser microphones to apply +48V DC to Pin 2 and 3
of all the MIC IN connectors 1–12.
Be sure to turn this switch OFF when the phantom power
is not in use.
* You may connect balanced dynamic microphones or
line sources when this switch is ON. However,
connecting, unbalanced devices, or devices in which
the center of the transformer is grounded may cause
hum noise or malfunction.
The phantom power supply can provide a maximum of
40 mA of current. Check the specifications of your con-
denser mics, and make sure that the total current con-
sumption is no more than 40 mA.