Yamaha AUDIOGRAM 6 Service Manual page 15

2-6 Gain
Check that the output level of each output terminal is within the range shown in the [Table 2-6.1] and [Table 2-6.2].
* Check that the difference in the level between channels is 2.0 dB or less.
Table 2-6.1 CH INPUT (CH1, CH2) [dBu]
INPUT
q
1
XLR
w
2
q'
1 (L)
PHONE
w'
2 (R)
e
1
PHONE
(UNBAL)
r
2
*1 Set the MONO/STEREO switch to ON (STEREO).
*2 Set the MIC/INST switch to ON (INST).
Table 2-6.2 ST CH INPUT (CH3/4, CH5/6) [dBu]
INPUT
3 L/MONO
t
5 L/MONO
3 L/MONO
y
PHONE
5 L/MONO
u
4 R, 6 R
2-7 Frequency characteristics
In the signal path of q to u in the [Table 2-6.1] and [Table 2-6.2], check that the output level of each output terminal is within the
range of +1.0/-3.0 dB compared with that of 1 kHz when the signal frequency is set to 20 Hz and 20 kHz. (GAIN control: Minimum)
* Check that the frequency characteristics is within the range of +1.0/-4.5 dB when the signal frequency is set to 20 Hz and 20
kHz and the GAIN control is at maximum.
* In the signal path of y, check only the STEREO OUT L, R.
2-8 Crosstalk
Input signal from the CH1 (L) and check that the leakage level to the STEREO OUT R is -56.0 dBu or less when the output level
of the STEREO OUT L is +14.0 dBu.
Input signal from the CH2 (R) and check that the leakage level to the STEREO OUT L is -56.0 dBu or less when the output level
of the STEREO OUT R is +14.0 dBu.
* Set the MONO/STEREO switch to ON (STEREO).
* Set the CH level controls of the channels which are not measured to minimum.
2-9 CHANNEL PEAK indicator
Check that the CHANNEL PEAK LED lights up when a signal within the range shown in the [Table 2-9.1] is fed to the input.
Table 2-9.1 [dBu]
INPUT Input level
1
-43.0 ± 2.0
2
3 L/MONO
-17.0 ± 2.0
5 L/MONO
2-10 MASTER PEAK/SIGNAL indicator
Check that the MASTER PEAK/SIGNAL LED lights up when a signal within the range shown in the [Table 2-10.1] is fed to the
input.
Table 2-10.1 [dBu]
INPUT
PEAK
1 -60.0 ± 2.0
Input GAIN
STEREO OUT L
level control
-82.0 Maximum -2.0 ± 2.0
-38.0 Minimum -2.0 ± 2.0
-2.0 ± 2.0
-82.0 Maximum
-66.0 Maximum -2.0 ± 2.0
-22.0 Minimum -2.0 ± 2.0
Input GAIN
STEREO OUT L
level control
-56.0 Maximum -2.0 ± 2.0
-12.0 Minimum -2.0 ± 2.0
-56.0 Maximum
Input level
SIGNAL
-80.0 ± 2.0
STEREO OUT R
–
-2.0 ± 2.0
*1
–
*1
– -2.0 ± 2.0
*2
–
*2
–
STEREO OUT R
–
-2.0 ± 2.0
– -2.0 ± 2.0
AUDIOGRAM6
PHONES L PHONES R
-14.8 ± 2.0 –
-14.8 ± 2.0 -14.8 ± 2.0
– -14.8 ± 2.0
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