Yamaha MW10 Service Manual page 29

3.7 Channel Equalizer Characteristics
In the state checked in 3.1 above, check the output level obtained at ST L OUT in the case of CH INPUT and ST
CH INPUT L and at ST R OUT in the case of ST CH INPUT R when LO, HI and MID of INPUT are moved
respectively.
Its level of each frequency shall be within the range specified in the Table 3.7-1 compared to the output level
obtained when the EQ gain control is center click position.
If it is without the range, search the frequency, within the range of +/-20%, of that the level is within the range of
Table 3.7-1.
Table 3.7-1 [dB]
EQ control EQ GAIN
HI MAX
MIN
MID MAX
MIN
LO MAX
MIN
3.8 Crosstalk
Setting the VR to the nominal position, and turning the PAN control (PAN/BAL or BAL control in the case of ST CH
INPUT) counterclockwise fully, the level of the leakage to ST R OUT shall be -50dBu or less when the output level
of ST L OUT is +20dBu.
Also turning the PAN (PAN/BAL,BAL) control clockwise fully, the level of the leakage to ST L OUT shall be -50dBu
or less when the output level of ST R OUT is +20dBu.
In measuring the CH7 to CH10, the level of the leakage to ST OUT shall be -34dBu or less.
3.9 PEAK LED light-up level
In the state 3.1, each LED shall light-up within the range specified in the table 3.9-1 when a signal is fed to the
MIC input.
Table 3.9-1 [dBu]
INPUT PEAK LED
MIC -43 +/-2
3.10 Meter LED lighting check
PEAK LEDs light up, when ST output level reaches +17.5 +/-2dBu.
"0" LED lights up, when ST output level reaches +4 +/-2dBu.
Operate the MASTER VR and check that LED light up in order from "-20" to "PEAK".
3.11 Distortion Factor
In the signal routes of the Table 3.3-1 to 3.3-6 indicated with q to !2 (except e, r), set the VR of INPUT and
MASTER to the Nominal Position, and set the GAIN to the position specified in the Table (except PHONES).
Then, feeding each 20Hz,1kHz and 20kHz signal, the distortion shall be less than 0.1%, when the output signal
level is +14dBu.
At the C-R OUT (L/ R), setting the Level Control to the 12 o'clock position, feeding each 20Hz,1kHz and 20kHz
signal, the distortion shall be less than 0.2%, when the output signal level is +3dBu.
* In the route q, check every OUT when the signal is fed to CH1, and check only the ST L OUT when the signal is
fed to CH2 and other channels.
* In the route w, turning the PAN/BAL control to L fully, the distortion shall be less than 0.1%, when the ST L OUT
signal level is +4dBu.
Applied frequency Variation width
10kHz +12 +/-2
-12 +/-2
2.5kHz +15 +/-2
-15 +/-2
100Hz +12 +/-2
-12 +/-2
MW10
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