Yamaha mg8/2fx Service Manual page 22

MG8 / 2FX
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INSPECTIONS
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1. Power Supply
AC Adaptor shall be used.
W0703500(U,V:120V), WC711000(O:220V), WC703800(K:220V), WC703700(B:230V),
WC703600(H,W:230V), WC703900(A:240V), WC703400(J:100V)
2. Power Indicator and Effect On LED Inspection
POWER LED &DIGITAL EFFECT ON LED shall light when the unit is turned on.
Next, turn off the DIGITAL EFFECT ON switch.(Then, LED shall be off.)
3. Mixer Section Inspection
3.1 Preparation
*Unless otherwise specified, the input signal shall be 1kHz sine wave, and the input signal impedance shall be 150Ω.
* The load resistances for each output terminal are as follows.
PHONES(L/R) : 40Ω
Others :
* Unless otherwise specified,the operation elements shall be set as follows.
• CH(1-2) INPUT
GAIN control
√ 80 switch
EQ (HIGH, MID, LOW)level control
EFFECT level control
PAN control
CH LEVEL VR
• ST CH (3/4, 5/6)
TE
L 13942296513
GAIN control
√ 80 switch
EQ (HIGH, MID, LOW)level control
EFFECT level control
PAN/BAL control
CH LEVEL VR
• ST CH (7/8)
EQ (HIGH, MID, LOW)level control
EFFECT level control
BAL control
CH LEVEL VR
• DIGITAL EFFECT
PROGRAM select switch
PARAMETER control
ON switch
EFFECT RTN VR
• MASTER control
RETURN to ST level control
2TR IN to ST level control
C-R/PHONES level control
ST Master VR
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• Others
PHANTOM switch
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10kΩ
: MAX(-60dBu)
: OFF
: CENTER
: MAX
: L
: MAX
: MIC: MAX(-60dBu)
: OFF
: CENTER
: MAX
: L
: MAX
: CENTER
: MAX
: L
: MAX
: 1
: MIN
: ON(LED shall light)when taking measurement only/OFF otherwise
: MAX when taking measurement only/MIN otherwise
: MAX
: MAX
: MAX
: MAX
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: OFF
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