Copyright (c) Yamaha Corporation. All rights reserved. PDF-K135 ’03.04
(目次)
(
総合仕様
(
寸法図
(パネルレイアウト)
(ICブロック図)
(シート基板図)
(検査)
)
)
(分解手順)
(総回路図)
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HAMAMATSU, JAPAN
1
MG10/2
IMPOR T ANT NOTICE
This manual has been provided for the use of authorized Yamaha Retailers and their service personnel. It has been assumed
that basic service procedures inherent to the industry, and more specifically Yamaha Products, are already known and understood by the users, and have therefore not been restated.
WARNING :Failure to follow appropriate service and safety procedures when servicing this product may result in per-
IMPORTANT :This presentation or sale of this manual to any individual or firm does not constitute authorization certifi-
The data provided is belived to be accurate and applicable to the unit(s) indicated on the cover. The research engineering, and
service departments of Yamaha are continually striving to improve Yamaha products. Modifications are, therefore, inevitable
and changes in specification are subject to change without notice or obligation to retrofit. Should any discrepancy appear to
exist, please contact the distributor’s Service Division.
WARNING :Static discharges can destroy expensive components. Discharge any static electricity your body may have
IMPORTANT :Turn the unit OFF during disassembly and parts replacement. Recheck all work before you apply power
sonal injury, destruction of expensive components and failure of the product to perform as specified. For
these reasons, we advise all Yamaha product owners that all service required should be performed by an
authorized Yamaha Retailer or the appointed service representative.
cation, recognition of any applicable technical capabilities, or establish a principal-agent relationship of
any form.
accumulated by grounding yourself to the ground bus in the unit (heavy gauge black wires connect to
this bus.)
to the unit.
WARNING: CHEMICAL CONTENT NOTICE!
The solder used in the production of this product contains LEAD. In addition, other electrical/electronic and/or plastic (Where
applicable) components may also contain traces of chemicals found by the California Health and Welfare Agency (and possibly
other entities) to cause cancer and/or birth defects or other reproductive harm.
DO NOT PLACE SOLDER, ELECTRICAL/ELECTRONIC OR PLASTIC COMPONENTS IN YOUR MOUTH FOR ANY REASON WHAT
SO EVER!
Avoid prolonged, unprotected contact between solder and your skin! When soldering, do not inhale solder fumes or expose
eyes to solder/flux vapor!
If you come in contact with solder or components located inside the enclosure of this product, wash your hands before handling
food.
IMPORTANT NOTICE FOR THE UNITED KINGDOM
Connecting the Plug and Cord
IMPORTANT. The wires in this mains lead are coloured in accordance with the following code:
As the colours of the wires in the mains lead of this apparatus may not correspond with the coloured makings identifying the terminals in your
plug proceed as follows:
The wire which is coloured BLUE must be connected to the terminal which is marked with the letter N or coloured BLACK.
The wire which is coloured BROWN must be connected to the terminal which is marked with the letter L or coloured RED.
Making sure that neither core is connected to the earth terminal of the three pin plug.
BLUE : NEUTRAL
BROWN : LIVE
WARNING
Components having special characteristics are marked and must be replaced with parts having specification equal to those
originally installed.
Phantom +48 VDC Power (Balanced input)Supplied when Phantom +48 V switch is ON.
Included AccessoryPower adaptor (PA-10)
OptionMicrophone-stand adaptor (BMS-10A)
Power Supply
Power Consumption19 W
Max. Dimensions (W
Weightkg
1
2
3
×H ×
D)251
Where 0 dBu = 0.775 V and 0 dBV = 1 V
0.1 % (THD+N) @+14 dBu, 20 Hz–20 kHz, 10 kΩ (with gain control at maximum level)
(CHs 1 and 2)
–87 dBu (91 dB S/N)
–85 dBu (89 dB S/N)All channel mix controls at minimum level.
–64 dBu (68 dB S/N)
60 dB CH MIC INPUT → CH INSERT OUT
76 dB CH MIC INPUT → ST OUT
64.2 dB CH MIC INPUT → REC OUT
70 dB CH MIC INPUT →AUX SEND1 (PRE)
76 dB CH MIC INPUT → AUX SEND2 (POST)
76 dB ST CH MIC INPUT → ST OUT
50 dB ST CH LINE INPUT → ST OUT
41 dB ST CH LINE INPUT → AUX SEND1 (PRE)
47 dB ST CH LINE INPUT → AUX SEND2 (POST)
26 dB ST CH INPUT → ST OUT
12 dB AUX RETURN → ST OUT
23.8 dB 2TR INPUT → ST OUT
–70 dB between input channels
–70 dB between input/output channels (CHs 1 to 6)
±15 dB
HIGH 10 kHz shelving
MID 2.5 kHz peaking
LOW 100 Hz shelving
On each channel: red indicator lights if post-EQ signal (on ST channels, if either post-EQ signal or post-mic-amp signal) comes within 3 dB of the clipping level.
Two 12-point LED meters [Stereo (L, R)]
Peak point: red indicator
+5, +3, +1, and 0 points: yellow indicators
–1, –3, –5, –7, –10, –15, –20: green indicators
USA and Canada:120 V AC, 60 Hz
Europe:230 V AC, 50 Hz
Australia:240 V AC, 50 Hz
Korea:220 V AC, 60 Hz
×
65 ×290.5 mm
1.8
ST, Master fader at nominal level and all Ch at minimum
level.
ST, Master fader and one Ch fader at nominal level.
(CHs 1 and 2)
Ω
(with gain control at maximum level)
MG10/2
1
Measured with 12.7 kHz, –6 dB/oct. low pass filter (equivalent to 20 kHz, –∞ filter).
(CH MIC INPUT to ST, AUX, EFFECT SEND)
2
Turning PAN/BAL to left or right.
3
Shelving turnover/rolloff frequency: 3 dB before maximum cut or boost.
3
MG10/2
Input Specifications
Input ConnectorGain
MIC INPUT
(CH 1-2)
LINE INPUT
(CH 1, 2)
ST CH MIC INPUT
(CH3/CH4,CH5/CH6)
ST CH LINE INPUT
(CH3(L)/CH4(R),
CH5(L)/CH6(R))
ST CH INPUT
(CH7(L)/CH8(R),
CH9(L)/CH10(R))
CH INSERT IN
(CH 1, 2)
AUX RETURN (L, R)10 kΩ600 Ω line
–60
–16
–34
+10
–60
–16
–34
+10
Input
Impedance
3 kΩ50–600 Ω mic
10 kΩ600 Ω line
3 kΩ50–600 Ω mic
10 kΩ600 Ω line
10 kΩ600 Ω line
10 kΩ600 Ω line
Appropriate
Impedance
Sensitivity*Rated Level
–72 dBu
(0.195 mV)
–28 dBu
(30.9 mV)
–46 dBu
(3.88 mV)
–2 dBu
(0.616 V)
–72 dBu
(0.195 mV)
–28 dBu
(30.9 mV)
–46 dBu
(3.88 mV)
–2 dBu
(0.616 V)
–22 dBu
(61.6 mV)
–20 dBu
(77.5 mV)
–12 dBu
(195 mV)
–60 dBu
(0.775 mV)
–16 dBu
(123 mV)
–34 dBu
(15.5 mV)
+10 dBu
(2.45 V)
–60 dBu
(0.775 mV)
–16 dBu
(123 mV)
–34 dBu
(15.5 mV)
+10 dBu
(2.45 V)
–10 dBu
(245 mV)
0 dBu
(0.775 V)
+4 dBu
(1.23 V)
Max. Before
Clipping
–40 dBu
(7.75 mV)
+4 dBu
(1.23 V)
–14 dBu
(155 mV)
+30 dBu
(24.5 V)
–40 dBu
(7.75 mV)
–10 dBu
(245 mV)
–14 dBu
(155 mV)
+30 dBu
(24.5 V)
+10 dBu
(2.45 V)
+20 dBu
(7.75 V)
+24 dBu
(12.3 V)
Connector
Specifications
XLR-3-31 type (balanced)
Phone jack (TRS)
(balanced [T: hot; R: cold;
S: ground])
XLR-3-31 type (balanced)
Phone jack (unbalanced)
Phone jack (unbalanced);
RCA pin jack
Phone jack (TRS)
(unbalanced [T: out; R: in;
S: ground])
Phone jack (TRS) (unbalanced
[T: hot; S: ground])
2TR IN (L, R)10 kΩ600 Ω line
–26 dBV
(50.1 mV)
–10 dBV
(316 mV)
+10 dBV
(3.16 V)
RCA pin jack
Where 0 dBu = 0.775 V and 0 dBV= 1V
* Input sensitivity: the lowest level that will produce the nominal output level when the unit is set to maximum gain.
Output Specifications
Output Connectors
ST OUT (L, R)150 Ω10 kΩ line+4 dBu (1.23 V)+20 dBu (7.75 V)
Bundle the four cables connected to power switch
by the cable tie and pull to left side.
Wiring to MAIN circuit board
(MAINシートへの結線)
Need twist of
one rotation.
(1回ひねります。)
RED
BROWN
(V998150) is soldering on solder side.
(基板のハンダ面にハンダ付けします。)
When soldering a wire, it fixed in the state
that inclined to the left about 45 degrees,
and it wires so that it may not be from white
slash area of circuit board.
2-1Remove the bottom case. (See procedure 1.)
2-2Remove the screw marked [270]. The AC support
can then be removed. (Fig. 1, Photo. 1)
3.MAIN Circuit Board
(Time required: About 8 minutes)
3-1Remove the bottom case. (See procedure 1.)
3-2Remove the AC support. (See procedure 2.)
3-3Remove the ten (10) screws marked [280], the
twenty-one (21) hexagonal nuts and the eight (8)
level knobs marked [A]. The MAIN circuit board can
then be removed. (Fig. 1)
The knobs, buttons and meter cover on the MAIN
circuit board are not components of the circuit
board. When replacing the MAIN circuit board,
be sure to remove these parts according to the
following procedure.
3-4Remove the thirty-six (36) volume knobs marked [B],
the four (4) push HPF buttons and the push PFL
button from the MAIN circuit board. (Fig. 1)
3-5Remove the meter cover from the MAIN circuit board.
(Fig. 1)
4.Power Switch and AC Connector
(Time required: About 2 minutes each)
4-1Remove the bottom case. (See procedure 1.)
4-2Remove the AC support. (See procedure 2.)
4-3Remove the power switch by bending its claw from
the AC support. (Photo. 2)
4-4Remove the hexagonal nut and the flat washer. The
AC connector can then be removed from the AC
support. (Photo. 2)