Yamaha Mg12.4 Service Manual
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31 MG12/4 MG16/4 Pattern side B B MAIN: 2NA-WE52160 ¢Í»”ï £
32 MG12/4 MG16/4 MG16/4 JACK 1/2 Circuit Board Component side MIC LINE INSERT I/O to MAIN-CN101 to MAIN-CN301 to MAIN-CN501 to MAIN-CN701 to MAIN-CN901 1 2 34 567 8 1 2 34 567 8 1 2 34 567 89 1 9(L) 10(R) 11( 12( R C C 01 to MAIN-CNA01 to MAIN-CND01 to MAIN-CNE01 to MAIN-CNG01 11 ) 11(L) 12(R) 13(L) 14(R) 15(L) 16(R) L RETURN SEND C-R OUTRL R L R L R AUX1 AUX2 ST OUT GROUP OUT REC OUT 2TR IN 12 R R L L 16(R) 14(R) 15(L) 13(L) C C JACK 1/2: 2NA-WE57310 ¢ æ ¼ £
33 MG12/4 MG16/4 to MAIN-CNH01 PHONES MG16/4 JACK 1/2 Circuit Board Component sidePattern side Pattern side MG16/4 JACK 2/2 Circuit Board D D D D JACK 1/2, 2/2: 2NA-WE57310 ¢Í»”ï £ ¢Í»”ï £ ¢ æ ¼ £
34 MG12/4 MG16/4 MG12/4 MAIN Circuit Board GAIN HPF HIGH MID LOW AUX1 PRE AUX2 PA N ST PFL 1-2 1234 to JACK 1/2-CN571 to JACK 1/2-CN771 to JACK 1/2-CN971 to JACK 1/2-CNA71 to JACK 1/2-CND71 to JACK 1/2-CN ST ST AUX2 AUX1 GROU PHANTOM+48V 2TR IN RETURN S 5/6 7/8 9/10 11/12 PAN/BAL PAN/BAL BAL BAL PEAK PEAK PEAK PEAK PEAK PEAK E E MAIN: 2NA-WE52150
35 MG12/4 MG16/4 Component side ACK 1/2-CND71 to JACK 1/2-CNE71 to JACK 1/2-CNG71 to PS-CN02 to JACK 2/2-CNH02 ST ST C-R/PHONES AUX2 AUX1 AUX2 TO ST ST/ GROUP AUX1 ST GROUP 1-2 PHANTOM +48V 2TR IN RETURN SEND 2TR IN PEAK+5 +3 +1 0 -1 -3 -5 -7 -10 -15 -20 LSTR 12POWER 11/12 BAL E E MAIN: 2NA-WE52150 ¢ æ ¼ £
36 MG12/4 MG16/4 MG12/4 MAIN Circuit Board F F MAIN: 2NA-WE52150
37 MG12/4 MG16/4 to MAIN-CNH01 PHONES Component side Pattern side Pattern side MG12/4 JACK 2/2 Circuit BoardF F JACK 2/2: 2NA-WE67570 MAIN: 2NA-WE52150 ¢Í»”ï £¢ æ ¼ £ ¢Í»”ï £
38 MG12/4 MG16/4 MIC LINE INSERT I/O1 234 1 234 12 34 to MAIN-CN901 to MAIN-CNA01 to MAIN-CND01 to MAIN-CNE01 to MAIN-CNG01 57 5(L) 6(R) 7(L) 8(R) 9(L) 10(R) 11(L) 12(R) L RETURN SEND C-R OUTRL R L R L R AUX1 AUX2 ST OUT GROUP OUT REC OUT 2TR IN 12 R R L L 12(R) 10(R) 11(L) 9(L) to MAIN-CN501 to MAIN-CN701 MG12/4 JACK 1/2 Circuit Board JACK 1/2: 2NA-WE67570 Component side ¢ æ ¼ £Pattern side¢Í»”ï £
39 MG12/4 MG16/4 INSPECTIONS Scope This inspection specifications is applied to the mixer MG12/4 and MG16/4. 1. Measurement Conditions 1-1. Environment Normal temperature (10 to 35°C) Mormal humidity (45 to 85%) 1-2. Power Source The voltage is within +/- 10%. AC Adaptor (PA-20) shall be used. WC704200 (H, W:230V 50Hz) or WC704100 (U, V:120V 60Hz), WC704300 (B:230V 50Hz), WC704400 (K:220V 60Hz), WC704500 (A:240V 50Hz), WC711100 (O:220V 60Hz) 2. Electric Characteristics 2-1. Preparation The load resistance for each output terminals are as follows, PHONES (L/R) : 40 ohms ST OUT (XLR) : 600 ohms Others : 10 kohms 2-2.Unless otherwise specified, the operation elements shall be set as follows, • CH INPUT (1-4: MG12/4, 1-8: MG16/4) GAIN control MAX(-60dBu) 80 switch OFF HI, MID, LO EQ Gain control CENTER AUX1, AUX2 Level control MAX AUX1 PRE switch OFF(POST) PAN control L(turned counterclockwise fully) ON switch ON(LED shall light) when taking measurement only/OFF otherwise PFL switch ON(LED shall light) when taking measurement only/OFF otherwise 1-2 switch ON when taking measurement only/OFF otherwise Fader MAX • ST CH (5/6, 7/8: MG12/4, 9/10, 11/12: MG16/4) GAIN control MIC: MAX(-60dBu) 80 switch OFF HI, MID, LO EQ Gain control CENTER AUX1, AUX2 Level control MAX AUX1 PRE switch OFF(POST) PAN/BAL control L(turned counterclockwise fully) ON switch ON(LED shall light) when taking measurement only/OFF otherwise PFL switch ON(LED shall light) when taking measurement only/OFF otherwise 1-2 switch ON when taking measurement only/OFF otherwise Fader MAX • ST CH (9/10, 11/12: MG12/4, 13/14, 15/16: MG16/4) HI, MID, LO EQ Gain control CENTER AUX1, AUX2 Level control MAX AUX1 PRE switch OFF(POST) BAL control L(turned counterclockwise fully) ON switch ON(LED shall light) when taking measurement only/OFF otherwise PFL switch ON(LED shall light) when taking measurement only/OFF otherwise 1-2 switch ON when taking measurement only/OFF otherwise Fader MAX
40 MG12/4 MG16/4 2-6. Gain The output levels shall be within the range specified in the Table 2-6-1 - 2-6-6. In the INPUT CH column, alphanumeric figures in front represent MG 12/4 and those in the parentheses represent MG 16/4. Table 2-6-1 CH INPUT(1-4/8) [dBu ] INPUTINPUT Gain ST L OUT ST R OUT GROUP 1 ~ 2AUX1 AUX2 C-R OUT *2 C-R OUT *3 Level PRE OFF PRE ON Mic -80 Max +1 +/- 2 *1 +1 +/- 2 *1 +4 +/- 2 +6 +/- 2 -4 +/- 2 +6 +/- 2 +0 +/- 2 +20 +/- 2 GROUP TO ST, 1-2 SW ON +14 +/- 2 *4 +14 +/- 2 *4————— — -36 Min +1 +/- 2 *1——————— Line -54 Max +1 +/- 2 *1——————— *1 Measure with the PAN control set at the center position. For others, turn the PAN control counterclockwise fully for the ST L and the odd number of GROUP OUT and turn it clockwise fully for the ST R and the even number of GROUP OUT. *2 PFL switch to ON. *3 Set the 1- 2 switch to ON and the C-R/PHONES Output and Meter Select switch to GROUP. Measure only the case of CH1. *4 Measure only the case of CH1. Table 2-6-2 [dBu ] INSERT OUT INPUT INPUT Level Gain 1-4/8REC OUT L REC OUT R Mic 1-4/8 -80 Max -20 +/- 2—— CH INSERT IN 1 0 Unspecified—+2.2 +/- 2 +2.2 +/- 2 CH INSERT IN 2-4/8 0 Unspecified—+2.2 +/- 2— Table 2-6-3 Input Terminal STEREO IN [dBu ] INPUT AUX1 C-R OUT INPUT INPUT CH LevelGain ST L OUT ST R OUT GROUP1 GROUP2 PRE OFF PRE ONAU X 2 *2 Mic5/6, 7/8 -80 Max 0 +/- 2 *1 0 +/- 2 *1 +3 +/- 2 +3 +/- 2 +8 +/- 2 -2 +/- 2 +8 +/- 2 -1 +/- 2 9/10, 11/12 -36 Min +1 +/- 2 *1— — ————— PHONE JACK 5L, 7L (9L, 11L)-54 Max +3 +/- 2— — ————— 6R, 8R (10R, 12R) —+3 +/- 2— ————— w e r q • MASTER control GROUP1-2 Master Fader (60mm) MAX GROUP1-2 TO ST assign switch OFF STEREO Master Fader (Stereo 60mm) MAX AUX1, AUX2 SEND Master Level control MAX RETURN to AUX1, AUX2, ST Level control MAX C-R/PHONES Level control MAX C-R OUT source select switchs ST • Others PHANTOM switch OFF 2-3.Unless otherwise specified, the input signal shall be 1kHz sine wave. 2-4.The input signal impedance shall be 150 ohms. 2-5. Indicator Inspection POWER LED shall light when the unit is turned on.