Yamaha Tyros4, Руководство по обслуживанию

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Tyros4
88
０３７：ＭＩＤＩ Ｃｈｅｃｋ
ＭＩＤＩ−Ａ Ｃｈｅｃｋ ＮＧ
ＭＩＤＩ−Ｂ Ｃｈｅｃｋ ＯＫ
When the MIDI-A is NG and MIDI-B is OK.
０３７：ＭＩＤＩ Ｃｈｅｃｋ
ＯＫ
When both the MIDI-A and B are OK.
０３７：ＭＩＤＩ Ｃｈｅｃｋ
ＭＩＤＩ−Ａ Ｃｈｅｃｋ ＮＧ
ＭＩＤＩ−Ｂ Ｃｈｅｃｋ ＮＧ
When both the MIDI-A and B are NG.
Supplement:
In case of no input one second after the output, the result is
judged as NG.
Test 38
Function: Loop Send/Return check
Description:
Loop Send/Return function check using an audio cable.
The sine wave A3 note signal will be outputted from [LINE
OUT (MAIN)] when test is started.
The sound output will switched from [LINE OUT (MAIN)]
to [AUX OUT/LOOP SEND] terminals when an audio cable
is inserted to [AUX OUT/LOOP SEND L/L+R] terminal.
If connect [AUX OUT/LOOP SEND] to [AUX IN/LOOP
RETURN] terminals in above setting, A3 note signal will
output from [LINE OUT (MAIN)].
Level check:
Set the [MASTER VOLUME] to the maximum level.
Connect a level meter (JIS-C curve) to [LINE OUT MAIN
L/L+R] terminal.
Load should be 10 k
Ω .
q
When the test is started.
LINE OUT MAIN L/L+R: +9.5±2 dBu
w
When an audio cable is inserted to [AUX OUT/LOOP
SEND L/L+R] terminal.
LINE OUT MAIN L/L+R: -75.0 dBu or less
Displayed Message:
０３８：Ｌｏｏｐ Ｓｅｎｄ／Ｒｅｔｕｒｎ Ｃｈｅｃｋ
Selected screen
０３８：Ｌｏｏｐ Ｓｅｎｄ／Ｒｅｔｕｒｎ Ｃｈｅｃｋ
ＬＯＯＰ ＳＥＮＤ ＮＯＴ Ｉｎｓｅｒｔｅｄ．
When the LOOP SEND jack is not connected.
０３８：ＬｏｏｐＳｅｎｄ／ＲｅｔｕｒｎＣｈｅｃｋ
ＬＯＯＰ ＳＥＮＤ Ｉｎｓｅｒｔｅｄ．
When connection to the LOOP SEND jack is detected.
Supplement:
No detection of connection is conducted at the [AUX OUT/
LOOP SEND(R)] terminal.