Yamaha em 150 service manual

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YAMAHA

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EM- 750 Ensemble Mixer

SERVICE MANUAL

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SPECIFICATIONS

Number of Inputs

Input Channel Controls

Mixing Buses
Number of Outputs

Master Controls
Echo and Reverb

Powe r 0 utput
Graphic Equalizer

Level Indicators
Amplifier Type
Power Requirements
Physical Dimensions

Finish ~

6-input channels (each switchable for MIC, INST or _LlNE).
2-auxiliary stereo input (AUX and REC OUT).

1-auxiliary monaural input (FROM ECHO).

VOLUME, BASS & TREBLE tone (t12dB of low and high
frequency equalization), REVERB/ECHO, BALANCE (stereo pan),
MlC/lNST/LINE (Input Selector).

2-Program (stereo Left and Right), 1-Reverb/Echo.

2-SPEAKER, 2-MONITOR OUT, 2-RECORD OUT, 1-PHONES,
1-TO ECHO.

MASTER VOLUME, MONITOR VOLUME, MASTER REVERB/
ECHO, AUX VOLUME, graphic equalizer ON/OFF (Left 8t Right).
Built-in Accutronics spring-type reverberation unit: provisions for
connection of external reverb, echo delay, or other effects devices.
150-Watts RMS (2 X 75-W) amplifier. For 8-ohm speakers.
7-Band, for SPEAKER and PHONES outputs; 12dB of boost or
cut at: 60Hz, 150Hz, 400Hz, 1kHz, 2.5kHz, 5kHz & 10kHz.
2-illuminated VU meters; 0 VU=37.5 Watts (Sphm termination).
All solid state, discrete and integrated circuit.

110, 117,4130, 220 or 240 VAC, 50/60Hz.

Width 24%" (61 .50m) X Height 7%" (18.2cm) X Depth 16%

(41 .Ocm), Weight 39.7le. (18kg).

Black, with protective aluminum trim.

EM-150 (SA: 1501~ )

Additional Features Integral carrying strap, rubber feet, 24way power switch to minimize
hum, power 0N indicators in VU meters, color-coded control knobs.

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Connector, Level & Impedance Information

Circuit Type Connector Nominal Level Impedance
Inputs:

LINE standard phone (x6) -27dBm(35mV) 50 kohms
INST (same jack) ~33dBm(17rnV) 50 kohms
MIC (same jack) -52dBm(2mV) 10 kohms
AUX pin jack (x2) -21dBm(69mV) 50 kohms
FROM ECHO standard phone (x2) -3idBm(22mV) 50 kohms
Outputs:

SPEAKER standard phone (x2) 5-Watts RMS 8 ohms

MONITOR OUT standard phone (x2) 4dBrn (1.23 , 5 kohms
TO ECHO standard phone -20dBm(78mV) 50 kohms
RECORD OUT pin jack (x2) -22dBm(62mV) 50 kohms
PHONES stereo phone (varies w/SPEAKER) 8 ohms

*A/l connections are unbalanced.