Inspections; Scope; Power Source; Preparation - Yamaha MG12/4FX Service Manual

MG12/4FX
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INSPECTIONS

1.

Scope

This inspection specification is applied to the mixer MG12/4FX.
2.

Power Source

The voltage is within ±10%.
AC Adaptor shall be used.
Destination
J
U, V
O
K
B
H, W
A

3.1 Preparation

＊ Unless otherwise stated, the input signal should be sine wave at 1 kHz. The signal source impedance should be 150Ω.
The load resistance for each output terminals are as follows,
＊ PHONES (L,R):
ST OUT :
Others :
Unless otherwise specified, the operation elements shall be set as follows,
TE
•CH INPUT
L 13942296513
GAIN Control
80 switch
HI, MID, LO EQ Gain control
AUX level control
AUX PRE switch
EFFECT level control
PAN control
ON switch
PFL switch
1-2 switch
Fader
•ST CH (5/6, 7/8)
GAIN Control
80 switch
HI, MID, LO EQ Gain control
AUX level control
AUX PRE switch
EFFECT level control
PAN/BAL control
ON switch
PFL switch
1-2 switch
www
Fader
•ST CH (9/10, 11/12)
.
HI, MID, LO EQ Gain control
AUX level control
30
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Voltage AC Adaptor
100V WC70400
120V WC70410
220V WC71110
220V WC70440
230V WC70430
230V WC70420
240V WC70450
40 ohms
600 ohms
10 kohms
: MAX(-60dBu)
: OFF
: CENTER
: MAX
: OFF (POST)
: MAX
: L
: ON (LED shall light) when taking measurement only/ OFF otherwise
: ON (LED shall light) when taking measurement only/ OFF otherwise
: ON when taking measurement only/ OFF otherwise
: MAX
: MIC : MAX(-60dBu)
: OFF
: CENTER
: MAX
: OFF (POST)
: MAX
: L
: ON (LED shall light) when taking measurement only/ OFF otherwise
: ON (LED shall light) when taking measurement only/ OFF otherwise
: ON when taking measurement only/ OFF otherwise
: MAX
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y
i
: CENTER
: MAX
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