Yamaha AW 1600, Руководство по обслуживанию

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AW1600
49
4-2 Updating procedures
For details on the procedure, see “UPDATING THE
OPERATING SYSTEM” on page 46.
5. Inspection under the diagnostics mode
Perform under the “General Inspection” mode. (Do not
select the inspection items.)
While holding down the [UTILITY] and [TRACK 1] keys
simultaneously, turn on the power.
5-1 PHANTOM DC
(1) Short-circuit pin 2 and pin 3 of the XLR connector of
INPUT 1 and connect a 10 k
Ω
load resistance between
pin 1 and pin 2.
(2) Check the voltage at both ends of the 10 k
Ω
load
resistance is in the range of DC 33.1 V to DC 37.6 V
when turning on the PHANTOM CH 1-4 switch.
(3) Check INPUT 2, 3 and 4 in the same way.
(4) After checking INPUT 4, check the discharge begins
immediately when turning off the PHANTOM CH 1-4
SW.
(5) Check INPUT 5, 6, 7 and 8 in the same way as INPUT 1,
2, 3 and 4. Use the PHANTOM CH 5-8 SW for
checking.
5-2 AD/DA
(1) Use the 20-kHz LPF when measuring the distortion.
(2) Use the IHF-A FILTER when measuring the noise level,
and measure the level as average.
Short-circuit pin 2 and pin 3 of the XLR connector of
INPUT 1-8 with the 150
Ω
load resistance and input no
signal to the INPUT 8 (Hi-Z) terminal.
5-2-1 INPUT 1 (BAL XLR)
(1) Measure at INPUT 1 –> STEREO/AUX OUT L.
(2) Measured items
1
LINE gain
2
LINE maximum output
3
LINE distortion
4
LINE frequency response
5
LINE noise level
6
MIC gain
Set the INPUT GAIN VR to MAX [MIC].
7
MIC distortion
Set the INPUT GAIN VR to MAX [MIC].
8
MIC noise level
Set the INPUT GAIN VR to MAX [MIC].
5-2-2 INPUT 2 (BAL XLR)
(1) Measure at INPUT 2 –> STEREO/AUX OUT R.
(2) The measured item and the value are same as specified
for INPUT 1.
5-2-3 INPUT 3 (BAL XLR)
(1) Measure at INPUT 3 –> STEREO/AUX OUT L.
(2) The measured item and the value are same as specified
for INPUT 1.
5-2-4 INPUT 4 (BAL XLR)
(1) Measure at INPUT 4 –> STEREO/AUX OUT R.
(2) The measured item and the value are same as specified
for INPUT 1.
5-2-5 INPUT 5 (BAL XLR)
(1) Measure at INPUT 5 –> MONITOR OUT L.
(2) Set the MONITOR/PHONES VR to MAX.
(3) The measured item and the value are same as specified
for INPUT 1.
5-2-6 INPUT 6 (BAL XLR)
(1) Measure at INPUT 6 –> MONITOR OUT R.
(2) Set the MONITOR/PHONES VR to MAX.
(3) The measured item and the value are same as specified
for INPUT 1.
5-2-7 INPUT 7 (BAL XLR)
(1) Measure at INPUT 7 –> MONITOR OUT L.
(2) Set the MONITOR/PHONES VR to MAX.
(3) The measured item and the value are same as specified
for INPUT 1.
Input frequency Input level Standard output level Permissible range
1 kHz +4 dBu –10 dBV
–10
±
3 dBV
TRACK
1
UTILITY
AW1600
Copyright(c) 2005 YAMAHA
BOOT OS: V*.**
BUILD DATE 2005/**/** **:**:**
Input frequency Input level Permissible range (distortion)
1 kHz +4 dBV 1 % or less
Input frequency Input level Permissible range (distortion)
1 kHz +4 dBV 0.03 % or less
Input frequency Input level Permissible range (1 kHz reference)
20 Hz +4 dBu –3 to +1 dB
20 kHz +4 dBu –3 to +1 dB
Permissible range
–93 dBV or less
Input frequency Input level Standard output level Permissible range
1 kHz –46 dBu –10 dBV
–10
±
2 dBV
Input frequency Input level Permissible range (distortion)
1 kHz –46 dBu 0.2% or less
Permissible range
–65 dBV or less