Yamaha i88x, Руководство по обслуживанию

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i88X
52
[Check Item]
3-1 Confirm that the music data is played back correctly
from the Optical Input Device.
Make sure that the music data is played back
correctly from the OUTPUT 1 and OUTPUT 2 jacks
respectively.
Also, confirm that the LED of MONITOR SELECT
DIGITAL lights at that time.
T04: HiZ Check
[Description]
Apply the HiZ signal to the INPUT 1 jack via a
monoral plug and check that the specified signal is
output correctly.
[Equipment Setting]
Inspection tool: LoopBackOn, FS=96KHz,
Connection Setting(Master=PC)
Main Unit Setting:
PHANTOM SW
OFF
Input 1 HiZ (Gain Volume max)
Input 2 MIC (Gain Volume max)
Inputs 3 - 8 (Gain Volume max)
Monitor Select OFF
Optical Select DIGITAL
Monitor Volume max
Master Volume max
[Procedure]
4-1 Apply an input signal(-60dBu) to the INPUT 1 jack.
[Check Item]
4-1 Make sure that the output signal(-0+/-2dBu, 10K
ohm load) is output from the OUTPUT 1 jack.
T05: MIC Check
[Description]
•
Apply the Mic signal to the INPUT 1 and 2 jacks
and check that the specified signal is output cor-
rectly.
• Check that PHANTOM power functions correctly.
[Equipment Setting]
Inspection tool: LoopBackOn, FS=96KHz,
Connection Setting(Master=PC)
Main Unit Setting:
PHANTOM SW OFF
Input 1
MIC (Gain Volume max)
Input 2 MIC (Gain Volume max)
Inputs 3 - 8 (Gain Volume max)
Monitor Select OFF
Optical Select DIGITAL
Monitor Volume max
Master Volume max
[Procedure]
5-1 Apply an input signal(-60dBu) to the INPUT 1 jack.
5-2 Apply an input signal(-60dBu) to the INPUT 2 jack.
5-3 Set the [PHANTOM] switch to ON.
Set the [PHANTUM] switch to OFF.
[Check Item]
5-1 Make sure that the 4+/-2dBu, 10K ohm
load) is output from the OUTPUT 1 jack correctly.
Also, confirm that the distortion rate is 0.06% or
less at that time.
Make sure that the level of OUTPUT 2 is -58dBu or
less.
Make sure that the signal(-2+/-2dBu, 10K ohm load)
is output from the INSERT OUT1.
Apply the signal(-2dBu) to the INSERT IN1.
Confirm that the 4+/-2dBu, 10K ohm load)
is output from the OUTPUT 1.
5-2 Make sure that the 4+/-2dBu, 10K ohm
load) is output from the OUTPUT 2 jack correctly.
Also, confirm that the distortion rate is 0.06% or
less at that time.
Make sure that the level of OUTPUT 1 is -58dBu or
less.
Make sure that the signal(-2+/-2dBu, 10K ohm load)
is output from the INSERT OUT2.
Apply the signal(-2dBu) to the INSERT IN2.
Confirm that the 4+/-2dBu, 10K ohm load)
is output from the OUTPUT 2.
∗ Please check both TRS terminal and the XLR
terminal.
5-3 Confirm that the PHANTOM LED lights at that
time. Confirm that +48V+/-2V Input 1,2. Make sure
that the voltage is discharged when the PHANTOM
switch is OFF.(Check it for both CH1 and CH2.)
T06: ANALOG IN/OUT,UNLOCK Check
[Description]
Apply a LINE signal to each INPUT jack (1 through
8) and check that the specified signal is output
correctly.
[Equipment Setting]
Inspection tool: LoopBackOn, FS=96KHz,
Connection Setting(Master=PC)
Main Unit Setting:
PHANTOM SW OFF
Input 1
LINE (Gain Volume max)
Input 2 LINE (Gain Volume max)
Inputs 3 - 8 (Gain Volume max)
Monitor Select OFF
Optical Select DIGITAL
Monitor Volume max
Master Volume max
[Procedure]
6-1 Input a 24dBu) to the INPUT 1 jack.
6-2 Input a 24dBu) to the INPUT 2 jack.
6-3 Input a 10dBu) to the INPUT 1 jack.
6-4 Input a 10dBu) to the INPUT 2 jack.
6-5 Input a 10dBu) to the INPUT 3 jack.
6-6 Input a 10dBu) to the INPUT 4 jack.
6-7 Input a 10dBu) to the INPUT 5 jack.
6-8 Input a 10dBu) to the INPUT 6 jack.
6-9 Input a 10dBu) to the INPUT 7 jack.
6-10Input a 10dBu) to the INPUT 8 jack.