Yamaha MG24/14fx, Service Manual

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71
MG24/14FX
MG32/14FX
4.13 Residual Noise
In the state 4.1, set the all Fader and Level Controls of each input CH to MIN and set the all Assign switch and CH ON
switch to OFF.
Then, the noise level shall be less than the level specified in the Table 4.13-1.
4.14 Phase
In the state 4.1, the phase of the input signal and the output signal shall be the same.
4.15 PHANTOM
Connect a 10k ohms load resistance between the pin 1 and 2 of the INPUT A and short-circuit between the pin 2 and 3.
Turn on the PHANTOM switch (LED shall light) and the voltage between pin 1 and 2 shall be 35 +/-3V.
4.16 LAMP
Connect a 30ohms load resistance between the pin 2 and 3 of the LAMP(12V) connector. The voltage between pin 2 and
3 shall be within 11.3 +/-1VAC.
4.17 DIGITAL EFFECT
Set the CH1 & MASTER as follows and feed -46dBu signal to CH1 MIC.
* CH1 GAIN VR: MIN, PAD: OFF, Fader, EFF1-2: MAX
* MASTER SEND EFF1-2: MAX
The output levels shall be within the range specified in the Table 4.17-1~3.
In the state that showed in Table 4.17-1, TAP LED shall flash on and off.
Tap the TAP switch several times and check the interval that TAP LED blinks changes.
Connect a foot switch equivalent to FC5 or it to FOOT SWITCH input jack on rear panel. Tap the foot switch several times
and check the interval that TAP LED blinks changes.
4.18 Stability
Shunt the output terminal with the capacitance of 10pF-0.1microF respectively. Then, the unit shall not oscillate.
Shunt the all input terminals with 150 ohms, and set the all VR and EQ Control to MAX. Then, the unit shall not oscillate.
4.19 Primary Voltage Tolerance
The unit shall work normally with the primary voltage of +/-10%.
EFF RTN1, 2
PARAMETER
EFF RTN1
PROGRAM
AUX1-4 OUT
+5.0
±
3
+5.0
±
3
8
–
MIN
EFF RTN1, 2
AUX1-4
MAN
EFF RTN2
PROGRAM
–
16
EFF RTN1
ON SW
ON
OFF
EFF RTN2
ON SW
OFF
ON
Table 4.17-1
Table 4.17-2
Table 4.17-3
EFF RTN1, 2
1-2, 3-4 ST
EFF RTN1, 2
fader
GROUP
1-4 OUT
+10.5
±
3
+10.5
±
3
MAN ON
EFF RTN1, 2
PARAMETER
MIN
EFF RTN2
PROGRAM
–
16
EFF RTN1
ON SW
ON
OFF
EFF RTN2
ON SW
OFF
ON
GROUP, ST
fader
MAN
EFF RTN1
PROGRAM
8
–
ST
+10.5
±
3
+10.5
±
3
EFF RTN1, 2
PFL
EFF RTN1
PROGRAM
PHONES OUT
-4.5
±
3
-4.5
±
3
8
–
ON
EFF RTN1, 2
PARAMETER
MIN
EFF RTN2
PROGRAM
–
16
EFF RTN1
ON SW
ON
OFF
EFF RTN2
ON SW
OFF
ON
Fader/VR ST L/R OUT MONO OUT GROUP1-4 OUT AUX1-6 OUT EFFECT1-2 OUT PHONES OUT ST SUB OUT
MAX -74 -73 -77 -72 -76 -80 -78
MIN -99 -99 -100 -100 -100 -100 -100
Table 4.13-1 [dBu]