Inspection - Yamaha EMX66M Service Manual

INSPECTIONS
0. PREPARATION
(1) Mesuring instruments
• Oscillator (Ballance output type, Output impedance 150Ω)
• Oscilloscope (Input impedance 100kΩ)
• Level meter (Input impedance 100kΩ)
• Distortion Meter
(2) Notes for mesuring
• Noise level must be mesured by using DIN AUDIO FILTER.
• 0dB is equal to 0.775V.
1. Power Indicator Check
Confirm that the power indicator LED lights up while the power is ON.
2. Mixer Check
2.1 Preparation
• Except otherwise indicated, input signal should be 1kHz sine curve and output impedance of signal source should be 150Ω.
• Connect the load of 10kΩ to MAIN OUT, MONITOR OUT, EFFECT OUT and REC OUT terminal.
• Set each control as follows.
CH INPUT 1-4
EQ (HIGH, MID, LOW) level control:
MONITOR level control:
EFFECT level control:
LEVEL control:
PAD switch:
CH INPUT 5-6
EQ (HIGH, MID, LOW) level control:
MONITOR level control:
EFFECT level control:
LEVEL control:
EFFECT
DIGITAL EFFECT ON switch:
MAIN
GRAPHIC EQUALIZER (7 band) fader: CENTER
EFFECT RTN level control:
AUX IN level control:
2TR IN level control:
MASTER (MAIN) level control:
MONITOR
GRAPHIC EQUALIZER (7 band) fader: CENTER
EFFECT RTN level control:
2TR IN:
MASTER (MAIN) level control:
PHANTOM switch:
YAMAHA SPEAKER PROCESSING switch: OFF
POWER AMP switch:
CENTER
MAX
MAX
MAX
OFF
CENTER
MAX
MAX
MAX
OFF
MAX
MAX
MAX
MAX
MAX
MAX
MAX
OFF
MAIN-MONITOR
EMX66M
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