Yamaha EMX3000 Service Manual page 28

EMX3000
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1-7 POWER AMP
POWER AMP switch
POWER AMP (L/BRIDGE, R) level control
1-8 PHANTOM
PHANTOM switch
1-9 Measuring equipment
• The oscillator connected to the balanced type input terminal should be balanced output type with 150 ohm output impedance.
• The input impedance of the oscilloscope, level meter, etc. should be 100k ohms or more.
• The DIN audio filer should be used to measure the noise level.
2. GAIN
In the state as described in 1 above, check that the output level within the range specified in Tables 2-1 to 2-7 can be
obtained at each output terminal.
[Table 2-1] Input terminal CH1 to CH8
Input Input GAIN
level Trim
-60 MAX
MIC
-16 MIN
-34 MAX
LINE
+10 MIN
INSERT *2 0 —
TE
L 13942296513
*1: Measure the display output only.
*2: Measure CH1 to CH4 only.
*3: Turn on the PFL switch of the channel to which the signal was input.
[Table 2-2] Input terminal CH9/10, 11/12
Input Input A/B
level Switch
A-L/MONO
-34
A-R
A
A-L/MONO
+10
A-R
B-L -34
B
B-R +10
*1: Measure the display output only.
*2: Turn on the PFL switch of the channel to which the signal was input.
[Table 2-3] Input terminal ST SUB IN
Input Input level ST1 OUT ( L )
L/MONO
+4
R
*1: Turn on the PFL switch of the SUB IN to which the signal is input.
*2: The input level should be -6dBs.
[Table 2-4] Input terminal TAPE IN
www
Input Input level ST1 OUT ( L )
L
-7.8
R
.
*1: Turn on the PFL switch.
*2: The input level should be -17.8dBs.
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INSERT ST1,2
OUT *2 OUT(L,R)
0 +/- 2 +1 +/- 2
— +1 +/- 2 ST1(L) *1
— +1 +/- 2 ST1(L) *1
— +1 +/- 2 ST1(L) *1
— +1 +/- 2 ST1(L) *1
GAIN ST1
Trim OUT ( L,R )
+1 +/- 2
MAX
+1 +/- 2 ST1( R ) *1 +1 +/- 2 MONI 1 *1
+1 +/- 2 ST1( L ) *1
MIN
+1 +/- 2 ST1( R ) *1
MAX +1 +/- 2 ST1( L ) *1
MIN +1 +/- 2 ST1( R ) *1
ST1 OUT ( R ) MONI 1,2 OUT C-R/PHONES OUT *1
+4 +/- 2 +4 +/- 2
— +4 +/- 2
ST1 OUT ( R ) C-R/PHONES OUT *1
x ao
y
+4 +/- 2 —
— +4 +/- 2
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ST1L-ST1R
Minimum
OFF
MONO MONI 1,2 EFFECT
OUT OUT OUT
+4 +/- 2 +4 +/- 2 +10 +/- 2 -10.8 +/- 2
— — —
— — —
— — —
Q Q
— — —
3 6 7 1 3
MONI 1,2 EFFECT
OUT OUT
+7 +/- 2 +13 +/- 2
+7 +/- 2
— —
— —
— —
— —
[Unit: dBs]
+7 +/- 2 +3.5 +/- 2 *2
+1 +/- 2 +3.5 +/- 2 *2
[Unit: dBs]
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+3.5 +/- 2 *2
+3.5 +/- 2 *2
.
2 9 9 4 2 8
[Unit: dBs]
REC C-R/PHONES
OUT (L,R) OUT *3
+8.5 +/- 2
— —
— —
— —
— —
1 5 0 5 8 2 9 9 4
[Unit: dBs]
C-R/PHONES
OUT *2
+8.5 +/- 2
+8.5 +/- 2
—
—
—
—
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9 9
2 8 9 9