Yamaha MC1202 User manual

YAMAHA
®
AUTHORIZED
PRODUCT MANUAL
MC-Series Mixing Consoles

YAMAHA
MC-Series Mixing Consoles
Operating Manual

Congratulations!
You are the proud owner of a Yamaha MC-series Mixing Console. Whether you
chose the 8, 12 or 16-channel model, your Yamaha mixing console is a high-quality
product that will give you superior performance in a wide range of applications. In
addition to offering a versatile mixing system, the MC-series consoles offer electron-
ically balanced inputs and stereo outputs to maintain optimum signal quality over
long cable runs, a versatile 3-band equalizer with sweepable mid-frequency EQ on
each input channel, three independent AUX submix systems for external effects
routing or additional power amplifier feeds, cue switches for independent monitor-
ing of all input channels and busses, and a built-in talkback system for convenient
communication.
Of course, the MC-series mixing consoles also offer the high standard of quality and
great sound that Yamaha is famous for. We urge you to read this operation manual
thoroughly in order to make the most of the mixer’s many features and controls.
CONTENTS
PRECAUTIONS............................ 2
FRONT PANEL CONTROLS.................. 3
Input Channels
......................... 3
Master Control Section
................... 6
REAR PANEL CONNECTORS AND CONTROLS....9
APPLICATION EXAMPLE....................
11
BLOCK DIAGRAM........................
12
LEVEL DIAGRAM.........................
13
DIMENSION CHART........................
13
SPECIFICATIONS..........................
14
SERVICE...............................
15
1

PRECAUTIONSPRECAUTIONS
1. AVOID EXCESSIVE HEAT, HUMIDITY, DUST AND
VIBRATION
Keep the unit away from locations where it is likely to be
exposed to high temperatures or humidity–such as near
radiators, stoves, etc. Also avoid locations which are
subject to excessive dust accumulation or vibration which.
could cause mechanical damage.
2. AVOID PHYSICAL SHOCKS
Strong physical shocks to the unit can cause damage.
Handle it with care.
3. DO NOT OPEN THE UNIT OR ATTEMPT REPAIRS OR
MODIFICATIONS YOURSELF
This product contains no user-serviceable parts. Refer all
maintenance to qualified Yamaha service personnel. Open-
ing the unit and/or tampering with the internal circuitry
will void the warranty.
4. MAKE SURE POWER IS OFF BEFORE MAKING OR
REMOVING CONNECTIONS
Always turn the power OFF prior to connecting or dis-
connecting cables. This is important to prevent damage to
the unit itself as well as other connected equipment.
5. HANDLE CABLES CAREFULLY
Always plug and unplug cables–including the AC cord–by
gripping the connector, not the cord.
6. CLEAN WITH A SOFT DRY CLOTH
Never use solvents such as benzine or thinner to clean the
unit. Wipe clean with a soft, dry cloth.
7. ALWAYS USE THE CORRECT POWER SOURCE
Make sure that the power source voltage specified on the
rear panel matches your local AC mains supply.
U.S. & Canadian Models: 120V AC, 60Hz
General Model: 110 — 120/220 — 240 V AC, 50/60Hz
2

FRONT PANEL CONTROLSFRONT PANEL CONTROLS
Input Channels
PAD Switch
This switch attenuates the signal applied to the corresponding rear-panel HI-Z or LO-Z input by
20 dB prior to the head amplifier and input gain control. The PAD switch effectively increases
the range of input signal levels that can be handled by the mixer, preventing overloading of the
input circuitry when receiving high-level signals.
GAIN Control
This control adjusts the input sensitivity of each input channel between –60 dB (0.775 mV)
and –20 dB (77.5 mV) when the PAD switch is OFF (between –40 dB and 0 dB when the PAD
switch is ON). Continuously variable gain control allows optimum matching with virtually any
microphone or line source.
CLIP LED Indicator
The CLIP indicator LED lights when the post-EQ signal of the corresponding channel’s input
reaches a level 3 dB below the clipping level of the channel’s circuitry. If the CLIP indicator
lights more than only briefly on high-level transients it is necessary to decrease the input sensi-
tivity of the channel using the GAIN control and PAD switch or, if this does not provide
sufficient attenuation, to reduce the output level of the source connected to that channel’s
input.
3-bandEqualizer
The equalizer section provided on each input channel comprises shelving LOW and HIGH con-
trols, and a peaking MID control with a MID FREQ control that permits sweeping the midrange
center frequency from 350 Hz to 5 kHz.
Control
HIGH
Maximum
Boost/Cut Frequence Type
±15dB 10kHz Shelving
MID ±15dB 0.35~5kHz Peaking
LOW ±15dB 100Hz Shelving
3

AUX Controls (1,2 & 3)
The MC-series mixing consoles have three independent AUX busses which are fed by the
corresponding AUX controls on the input channels. Each AUX control determines the level of
the signal sent from that channel to the correspondingly numbered AUX mixing buss, which in
turn feeds the correspondingly numbered AUX SEND control and AUX SEND jack on the
console’s rear panel. The AUX controls can be used to determine the amount of signal from the
corresponding input channel sent to external effect devices or power amps fed by the AUX
SEND jacks:
*AUX 1 is factory pre-wired for pre-EQ/pre-fader operation, so the AUX 1 signal is not
affected by the setting of the channel EQ controls or fader. An internal jumper allows the
AUX 1 control to be rewired for post-EQ/post-fader operation.
*AUX 2 and AUX 3 are factory pre-wired for post-EQ/post-fader operation, so the AUX 2
and AUX 3 signals are affected by the setting of the channel EQ controls and fader. Internal
jumpers allow the AUX 1 control to be rewired for pre-EQ/pre-fader operation.
*An internal POST EQ jumper allows the AUX controls to be further re-configured for
post-EQ/pre-fader operation.
*REFER THE ABOVE-MENTIONED REWIRING JOBS TO QUALIFIED YAMAHA SER-
VICE PERSONNEL!
PAN Pots
The PAN pot determines the position. in the stereo sound field at which the sound from that
channel is heard. Rotated fully counterclockwise the channel signal will be delivered from the
left stereo output only, and will be heard at the far left of the sound field. If the PAN pot is
turned fully clockwise, the sound from that channel will appear at the far right of the stereo
sound field. If the PAN pot is set at its center position, the channel signal will be sent equally
to both the left and right channels, causing the sound to appear at the center of the sound field.
Intermediate PAN pot settings cause the sound to be heard at the corresponding position.
CUE Switch
When the CUE switch is pressed, the pre-EQ/pre-fader signal from that channel is fed to the
PHONES output via the CUE/PHONES level control. The channel cue signal will be added to
any other active cue signal. If you want to monitor only the signal from a single channel, make
sure all other CUE switches are turned OFF.
4

Channel Fader
This is the main level control for each input channel. It determines the level of the signal sent
from the corresponding input channel to the master stereo buss. The settings of the input
channel faders determine the "mix" or balance of sound levels between the instruments or
other sources connected to the inputs.
*If a channel is not being used, its fader should be set to the minimum position to prevent
unwanted noise from being added to the main program signal.
5

Master Control Section
AUX SEND (1, 2 & 3) Controls & CUE Switches
These adjust the overall output level of the auxiliary
"mixes" set up using the AUX 1, AUX 2 and AUX 3 con-
trols on the input channels. AUX SEND 1 sets the overall
level of the AUX 1 mix signal appearing at the AUX
SEND 1 jack, AUX SEND 2 sets the overall level of the
AUX 2 mix signal appearing at the AUX SEND 2 jack,
and AUX SEND 3 sets the overall level of the AUX 3
mix appearing at the AUX SEND 3 jack. These controls
should be used to optimally match the AUX SEND out-
put level of the mixing console to the input sensitivity of
the effect unit, signal processing device or amplifier used.
The CUE switches associated with each AUX SEND con-
trol can be used to send the corresponding AUX SEND
signal to the PHONES jack via the CUE/PHONES level
control. The AUX cue signal will be added to any other
active cue signal. If you want to monitor only the signal
from a single AUX buss, make sure all other CUE switches
are turned OFF.
AUX RTN 1 & AUX RTN 2 Controls
These controls adjust the level of the signal received at the
rear-panel AUX RTN jacks and mixed into the main
stereo program. Since stereo AUX returns are provided
(AUX RTN 1 L & R, AUX RTN 2 L & R) the AUX RE-
TURN controls simultaneously adjust the level of the
signals appearing at the corresponding L and R return
inputs. The returned L and R channel signals are sent to
the L and R stereo buss lines. If only a single-channel
signal is returned (i.e. a plug is inserted into only the L or
R return jack), the signal will be fed to both the L and R
channels of the stereo buss.
6

Talkback ON Switch
Pressing this switch activates the talkback microphone plugged into the talkback mic connector,
allowing voice communication from the console operator to the STEREO, AUX 1, AUX 2 or
AUX 3 busses according to the setting of the talkback assignment switches.
TB (Talkback) Level Control
Adjusts the level of the talkback signal sent to the selected buss.
Talkback Microphone Connector
This female XLR type connector accepts just about any standard 50 ~ 600 ohm microphone
for talkback pickup. A gooseneck-type microphone that can be positioned for the most com-
fortable operation is an excellent choice.
Talkback Assignment Switches (AUX1/AUX2/AUX3/ST)
These switches allow the talkback signal to be fed to the STEREO, AUX 1, AUX 2 or AUX 3
busses. Any number of switches may be ON at the same time, so you can "talk back" to a
number of the console’s busses at once.
7

VU Meters and METER Assign Switches (AUX1/AUX2/AUX3/CUE)
The MC-series mixing console feature three VU meters with built-in LED peak indicators for
monitoring signal levels. The rightmost meter pair (L ST R) continuously monitors signals
on the main stereo program buss. The AUX/CUE meter can be switched to monitor signals on
the AUX 1, AUX 2, AUX 3 or CUE busses by pressing the corresponding METER assign
switch.
CUE/PHONES Control and PHONES Jack
The CUE/PHONES control adjusts the level of the cue signal sent to the PHONES jack so you
can set the most confortable headphone monitoring level. The stereo phone jack accepts any
standard stereo headphones.
* The STEREO cue signal appears in stereo at the phones jack, while the channel and AUX
cue signals are monaural.
STEREO CUE Switch
Turning this switch ON sends the main stereo program buss signal, in stereo, to the stereo
PHONES jack via the CUE/PHONES control. The STEREO CUE switch can normally be turned
ON to permit headphone monitoring of the main stereo program, but it must be turned OFF
to individually monitor input channel or AUX buss cue signals.
8