Yamaha EMX66M Service Manual page 34

EMX66M
2.2 Gain Check
On condition of 2.1, confirm that the output level of each terminal meets the table 2.2-1.
Table 2.2-1
INPUT INPUT LEVEL
Low-Z
MIC -32 (PAD ON)
Hi-Z
LINE
Super Hi-Z
AUX
2TR
2.3 Frequency Characteristic Check
At each terminal of the Table 2.2-1, confirm that the output level for 20Hz, 20kHz signal are within +1, -3dB from the level for
1kHz signal.
2.4 EQ Response Characteristic Check
On condition of 2.1, set the LOW, MID, HIGH controls according to the table 2.4-1, and mesure the output level of MAIN OUT
and MONITOR OUT.
Then confirm that output level variations from center click position meet the table 2.4-1.
When output level does not meet the table, change the input frequency until the output level meets the table.
If the frequency variation is within ±20% of the rated value, the rusult can be regarded as OK.
Table 2.4-1
EQ
HIGH
MID
LOW
2.5 GEQ Response Characteristic Check
On condition of 2.1, set the GEQ faders to MIN or MAX, and mesure the output levels of MAIN OUT and MONITOR OUT.
Then confirm that output level variations from center click position meet the table 2.5-1.
When the output level does not meet the table, change the input frequency until the output level meets the table.
If the frequency variation is within ±20% from the rated value, the result can be regarded as OK.
Table 2.5-1
INPUT FREQUENCY
Variations
34
MAIN OUT(L,R)
-62
+4±2
-52 +4±2
-22 +4±2
-42 +4±2
-22 +4±2
-22 +4±2
VR Setting INPUT FREQUENCY
MAX
10kHz
MIN
MAX
2.5kHz
MIN
MAX
100Hz
MIN
125
125Hz
(for fader MAX)
(for fader MIN)
MONITOR OUT EFFECT OUT
+4±2
-
-
-
-
-
[unit: dB]
RANGE OF VARIATION
+12±2
-12±2
+14±2
-14±2
+12±2
-12±2
250 500 1k
250Hz 500Hz 1kHz
+12±2
-12±2
[unit: dBs]
REC OUT
+4±2 -13.8±2
- -
- -
- -
- -
- -
[unit: dB]
2k 4k
2kHz 4kHz 8kHz
8k