Yamaha MC1204 User manual

@YAMAHA
Series Mixers
OPERAl'lNG MANUAL
MC1204
C1604
MC2404

The Yamaha MC-series mixers have been designed to meet a broad variety
of applications with uncompromising overall electronic performance and
superior control capability. Their broad versatility and plentiful complement
of control features make them ideal for sound reinforcement, recording,
theater and production applications. Further, state-of-the-art design and
technology has made it possible to offer such exceptional flexibility and per-
formance at significantly reduced cost.
Your MC-series mixer should provide you with years of trouble-free perfor-
mance . To make the most ofall the features and performance it provides,
however, we recommend that you read this operating manual thoroughly
before use.
CONTENTS
Front Panel Operation
Input Channels ..... ... ".. . . .... 2
Echo Return and Group Out Sections ...... .. ...... . .. . .... .4
FB Oul, Echo Send and Stereo Out Sections ...... ...... .. ....... . .. " .......... 6
Phones and Talkback Section ".............. . ....." . . ....... ...... .... ....... 7
Rear Panel Connections ............... .. ... " ...... .. ." ................. ...... .. .. .. ..... " .. ......... " ... 8
VU Meters .......... . .. .... .. ........................ . ...... .. ............. ... .. ..... ..... . .. . .. ....................... ..9
Installation "." ....... .. .... .... . .. .... . ....... .. ......... .. .... .. . .. ........ ..... .. ... ................ .. .. "".,, 10
Operating Tips .... . ."."" .. " ..... .. ,, .......... .... ...... .. .. ... .... .. ". .. ...... ..." .. " .. 11
Application Examples .... .. ... "....... ................... .." ." .. " .. ....... ". ... . .... " .. .. 12
Specifications ... ". " ..... " .... ...... ............ ... .... " ........ .... ." .. ... ...... . ..... .. . .. ... ... . .. .. .. ... 15
Block Diagram ...................... . ..... .... .......... ..... ................ . ... . .... ." ..... .. 17
Level Diagram ...... ............. ............ .... ... .. ... .... .... ...... .... ... .... ........... ". ..... ............. 18

FRONT PANEL OPERATION
Input Channels
- ,~ • 15
M'D
o
11111111111111 1 111111111111 111 11
PAD ....
. ~ - eo
GA'N
... -t---iKt
. t::. • ,~
HIGH
o PAD switch, GAIN control and PEAK LED
These adjust the input sensitivity of the MC mixers over a wide range. The PAD switch
inserts a
20 dB pad ahead of the head amplifier, and the GAIN control continuously
adjusts the sensitivity of the head amplifier between -
20 and -60 dB.
The PEAK LED lights whenever the channel's post-EO, pre-fader signal comes within
3 dB
of clipping, warning the operator of impending channel overload.
8 HIGH, MID FREO/MID and LOW EO controls
These continuously variable controls allow ± 15 dB of equalization in the following
frequency ranges:
HIGH
.. .. .................... .. ....................... ... ... ... .. . .. . ... ..............10 kHz shelving.
MID/FREOUENCY........
.. . ''''''' ''' .......... .. ........, .. .. .. .. ,........ ... 350 Hz-5 kHz
peaking.
LOW ..............................................
.. ..................................100 Hz shelving.
Response
is flat at the center position.
( dB
)
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t!\
w
VI
Z
~ 0
VI
w
Q:
-5
-10
-15
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W FB 1 an FB 2 send contro s FREOUENCY
These controls feed a pre-EO, pre-fader signal to the Foldback 1 and Foldback 2
busses which
feed the FB 1 and FB 2 outputs, respectively.
These busses would normally
be used for stage foldback or monitor speaker systems.
Internal P.e. board jumpers are provided for changing the foldbacks to post
EO and
fader for use
as additional echo/effect sends. This modification can be made at any
Yamaha Service Center.
Post Insert 1/0
Pre EO Post EO Pre Fader
Po st Fader
F8 1.2
..... .... ... ......
FACTORY
SET
..... ........... 0 0 ........ .
ECHO 1.2 0 0 FACTORY
SET
o ECHO 1 and ECHO 2 controls
Adjusts the amount of post- EO , post-fader signal fed from that channel to the ECHO 1
and
ECHO 2 busses, which feed the ECHO 1 and ECHO 2 outputs, respectively.
The ecM busses may be used to feed outboard effect devices or as additional
foldback/monitor sends.
2

o PAN control and Group 1·2/3·4 Assignment Switches
The P'AN control assigns the channel fader output to group busses 1 -2 and/or 3-4
according to the setting of the buss assignment switches. When group assignment
switch 1
-2 is engaged, the signal is panned between busses 1 and 2. If 3-4 is engaged
the signal
is panned between busses 3 and 4. Both switches can be engaged, in which
case
the signal is panned between group busses 1 -3 and 2-4. Panning left delivers
more signal to busses 1 and
3, while panning right delivers more signal to busses
2 and 4.
o CUE button
Pressing the CUE button on any channel permits monitoring of only the selected chan-
nel signal via the headphone output. All other outputs are not affected. If more than
one channel
is "cued", their signals are summed and fed to the headphone output.
o CH ON buHon
The CH ON button turns the respective channel ON or OFF. This is handy for rapid
punch-ins
or punch-outs, or for temporarily killing a channel without disturbing the mix
fader level.
«3 Channel Fader
These set the mix level of each channel. These smooth linear faders also provide
a good visual indication of the overall mix levels. Rated output (nominal) level is
achieved with the fader set
at "6" ( ~ .... ) on the scale.
.
CH24,.,.rr----4-H-.~--_f:l
-20- -60dB
I MID fREO)
GROUP ECHO fB _
I 2 :5 4 I 2 I 2 OJE CUE
r--- LO Z
CH INPUT
MC 1204 CHI-(;HI2
MC 1604 CHI - CHI6
I ' :5
MC 2404 CH I -
l- ----®-I-®
L-- HI Z
~r- - -+@-I~
I
:C CH ON )
~--H-++'"
I
I I - ---+--H-+-H
~
'--------+-<~---r-L:-~
~-C-U-E-4~~+4~
3

r------,
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o
, ..
ST !REO
O' "'
ECHO RETURN I
CuE
o "'
G'1QUP our,
L •
GRO UP ' PAN
111111 111 11111111 1 1111 1 1111111111 11 11 11111 1
GROUP I
Echo Return and Group Out Sections
o Echo PAN control and 1·213·4ISTEREO assign switches
The PAN control assigns the echo return signal received at the appropriate ECHO
RTN jack to group busses 1-2 and/or 3-4 according to the setting of the buss assign-
ment switches.
The same signal can also be set to and panned across the LlR stereo
buss
by engaging the STEREO switch. When group assignment switch 1-2 is engaged,
the signal
is panned between busses 1 and 2. If 3-4 is engaged the signal is panned
between busses 3
and 4. Both switches can be engaged, in which case the signal is
panned between group busses 1-3 and 2·4. Panning left delivers more signal to
busses 1
and 3, while panning right delivers more signal to busses 2 and 4.
8 ECHO RETURN control
This control is used to match the sensitivity of the corresponding ECHO RTN input to
the output level of the external echo device used . Setting th is control to "8" on the
scale delivers rated output for a +4 dB input level.
8 CUE button
Pressing the CUE button permits monitoring of only the selected echo signal via the
headphone output.
All other outputs are not aHected.
GROOP ECHO FB STERE O
1 2 3 4 1 2 1 2
ruE CUE L R
ECHORTNI~
r----&>
(+4dBl
a
ECHO RETURN I)
f----b
ECHO RTN 2 ~'~
(+4dBl (ECHO RETURN 2)
"3L
(-
<
'.
\
,
(PAN) ,) \ \
-(-
2·4 ·R
' ·3 ·L
f
( \ \
,
(
PAN ) > \ \\
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2·4 ·R
\
\
\
\
\
\
\
o GROUP OUT control
This control adjusts the overall level at the corresponding G RO UP OUT XLR type con-
ne cto r. The GROUP master fade r does not aHect the level at the GROUP OUT XLR
-
type connector. Rated output (nominal) level is achieved at a setting of "8" on the
GROUP OUT control sca le .
1
J o ~ (~
Group ON Sw Group f ader
~ t----&>-
Group Ou, Vo '
Pre Post
Group ON Sw Group ON Sw
Group Fader
(Mix to
SD
0
FA C TOR Y SET
" GROUP PAN control
The GROUP PAN control a ss ign s the corresponding group signal to the Land R
STEREO busses.
4