Yamaha EMX 5000-12, Service Manual

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41
EMX5000-12/20
3 FREQUENCY RESPONSE
• In each state as described in Tables 2-1, 2-2, 2-3 and 2-4, input a signal at the frequency of 20Hz and 20kHz and check that
the output level at each output terminal is within the range of +1/-3dB with 1kHz used as a reference. At 20Hz with the GAIN
control set at the MAX position only, however, check that the output level is within the range of +1dB/-4.5dB. For PHONES,
take measurement at 2TR IN input terminal.
4 EQUALIZER CHARACTERISTICS
• In the state as described in 1, move each EQ control of INPUT and check that the output level of the frequency obtained at ST
OUT falls within the range given in Table 4-1 with the output level obtained at the center click position used as a reference.
If the output level at a specified frequency does not fall within the range given in Table 4-1, vary the frequency and check that
the output level as specified in the table below is obtained. Also, check that the frequency variation at this time is within the
range of specified frequency
±
20%.
*1: Turn on the PFL switch.
[Table 2-4] Input terminal [ST SUB IN (1, 2)] [Unit: dBs]
INPUT INPUT LEVEL ST OUT L ST OUT R AUX 1, 2 SEND PHONES L *1 PHONES R *1
L/MONO -6 +10
±
2 +10
±
2 +13
±
2 -1
±
2 -1
±
2
R -6 – +10
±
2 +7
±
2 – -1
±
2
*1: Turn on the PFL switch.
[Table 2-5] Input terminal [2TR IN] [Unit: dBs]
INPUT INPUT LEVEL ST OUT L ST OUT R PHONES L *1 PHONES R *1
L -17.8 +10
±
2 – -1
±
2 –
R -17.8 – +10
±
2 – -1
±
2
[Table 2-6 ] Input terminal [CH1: INPUT A], Output terminal [PHONES (L, R)] [Unit: dBs]
INPUT LEVEL GAIN ST AFL ON MONO AFL ON AUX 1, 2 AFL ON
-46 MIN. -4
±
2 -1
±
2 -5
±
2
[Table 4-1] (INPUT CH1-8: EMX5000-12 / 1-16: EMX5000-20) [Unit: dBs]
EQ level control f control Input frequency Variation width
LOW
MAX. –
10KHz
+12
±
2
MIN. – -12
±
2
MAX.
MIN. 250KHz
+15
±
2.5
MID
MIN. -15
±
2.5
MAX.
MAX. 5KHz
+15
±
2.5
MIN. -15
±
2.5
HIGH
MAX. –
100Hz
+12
±
2
MIN. – -12
±
2
[Table 4-2] Input terminal [ST INPUT, CH9-12: EMX5000-12 / CH17-20: EMX5000-20] [Unit: dBs]
EQ level control Input frequency Variation width
LOW
MAX.
100Hz
+12
±
2
MIN. -12
±
2
MID
MAX.
2.5KHz
+15
±
2.5
MIN. -15
±
2.5
HIGH
MAX.
10KHz
+12
±
2
MIN. -12
±
2
4a HPF characteristic
• In the state as described in 1, set the input signal level to 80Hz and turn on the HPF switch of CH INPUT 1 and check that the
output level of ST OUT L is within the range of –3
±
2dB with the level at the HPF switch OFF used as a reference.