Yamaha Mx12.6 Service Manual
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31 MX12/6 MX20/6 2-5. Separation With the fader set to the nominal position and the ST (assign switch) turned on at each INPUT channel, turn the Pan control (BAL control in the case of ST CH INPUT) counterclockwise fully and set the output level of ST L OUT to +20 dBs. Then check that the level of the leakage to ST R OUT is -50 dBs or less. Also, turn the PAN control clockwise fully and set the output level of ST R OUT to +20 dBs. Then check that the level of the leakage to ST L OUT is -50 dBs or less....
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¥ The level of [10] HALL 2 varies but it means nothing problematic.
¥ Apply no input signal, set the CH EFFECT level control to the MIN position and PROGRAM select switch to [11] HALL 3. Then
check that the noise level at ST L OUT and ST R OUT is -54 dBs or less.
¥ Take measurement using the DIN AUDIO filter and with RESPONSE set to AVE.
*1 Execute this check for each of 16 programs from [1] to [16]. Also, input the music source (such as vocal that enables to
recognize the effect easily)...](http://img.usermanuals.tech/thumb/83/103362/w300_d_1513000947-yamaha-mx12-6-service-manual_d-31.png "Page 32
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¥ The level of [10] HALL 2 varies but it means nothing problematic.
¥ Apply no input signal, set the CH EFFECT level control to the MIN position and PROGRAM select switch to [11] HALL 3. Then
check that the noise level at ST L OUT and ST R OUT is -54 dBs or less.
¥ Take measurement using the DIN AUDIO filter and with RESPONSE set to AVE.
*1 Execute this check for each of 16 programs from [1] to [16]. Also, input the music source (such as vocal that enables to
recognize the effect easily)...")
MX12/6 MX20/6 32 ¥ The level of [10] HALL 2 varies but it means nothing problematic. ¥ Apply no input signal, set the CH EFFECT level control to the MIN position and PROGRAM select switch to [11] HALL 3. Then check that the noise level at ST L OUT and ST R OUT is -54 dBs or less. ¥ Take measurement using the DIN AUDIO filter and with RESPONSE set to AVE. *1 Execute this check for each of 16 programs from [1] to [16]. Also, input the music source (such as vocal that enables to recognize the effect easily)...
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33 MX12/6 MX20/6
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35 MX12/6 MX20/6
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37 MX12/6 MX20/6
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MX12/6 MX20/6 38 CIRCUIT DIAGRAMS Note : See parts list for details of circuit board component parts. : Metal Film Resister : Flame Proof Carbon Resistor : Mylar Capacitor : Ceramic Capacitor CIRCUIT DIAGRAM 1/10 (MIAN 1/4) ..................... C1 CIRCUIT DIAGRAM 2/10 (MIAN 1/4) ..................... C2 CIRCUIT DIAGRAM 3/10 (MIAN 1/4) ..................... C3 CIRCUIT DIAGRAM 4/10 (MIAN 1/4) ..................... C4 CIRCUIT DIAGRAM 5/10 (MIAN 4/4) ..................... C5 CIRCUIT DIAGRAM 6/10 (MIAN 1/4,...
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6 5 4 3 H FG E D C B A AH G F E D C B 1 2C1MX12/6 MX20/6MX12/6 MX20/6 MX12/6 MX20/6 CIRCUIT DIAGRAM 1/10( MAIN1/4) Not used Not used UsedUsed R121, 221, 321, 421 C116, 216, 316, 416MX20/6 only 238CC1-8817676 to P.C2-G1 OP AMP OP AMP OP AMP OP AMP to MAIN 2/4-CN303 MX12/6 only OP AMP OP AMP OP AMP OP AMP OP AMP 1 2 1 21 2 ( P.C2-B1) OP AMP 1 2 OP AMP 1 2 OP AMP OP AMP 1/4to P.C3-G5 to P.C8-G2 ( to IN8 1/2-CN404) MAIN
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6 5 4 3 1 2C2 H ABG F CDE AH G BCF E D MX12/6 MX20/6 MX12/6 MX20/6 MX12/6 MX20/6 CIRCUIT DIAGRAM 2/10( MAIN1/4) 238CC1-8817676 to P.C3-G1 OP AMP ( P.C1-B1)from P.C1-G5 OP AMP OP AMPOP AMP OP AMP OP AMPOP AMP OP AMP OP AMP OP AMP OP AMP OP AMP OP AMP 1/4 MAIN