Test 16 - Function: Eq (Low) Frequency Check; Test 17 - Function: Eq (Mid) Frequency Check - Yamaha TYROS4 Service Manual

０１５：Ｏｕｔｐｕｔ Ｓｕｂ−２ Ｃｈｅｃｋ
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Supplement:
Sound is stopped when the test item is quit.
Noise Level:
Set the [MASTER VOLUME] to the maximum level.
Connect a level meter to the L/R of [PHONES] terminal.
Load should be 33 Ω. (30 Ω is acceptable as well: -0.6 dB)
L side: -80.0 dBu or less
R side: -80.0 dBu or less
Set the [MASTER VOLUME] to the maximum level.
Connect a level meter to the MAIN L/L+R, R of [LINE OUT]
terminal.
(Use two monaural jacks simultaneously)
Load should be 10 k Ω.
L side: -75.0 dBu or less
R side: -75.0 dBu or less
Set the [MASTER VOLUME] to the maximum level.
Connect a level meter to the [WOOFER R] terminal.
(L side: between 6P-3P, R side: between 5P-3P, GND: 3P)
Load should be 470 Ω.
L side: -80.0 dBu or less
R side: -80.0 dBu or less
Set the [MASTER VOLUME] to the maximum level.
Connect a level meter to the [LINE OUT SUB1] terminal.
Load should be 10 k Ω.
SUB1 side: -80.0 dBu or less
Set the [MASTER VOLUME] to the maximum level.
Connect a level meter to the [LINE OUT SUB2] terminal.
Load should be 10 k Ω.
SUB2 side: -80.0 dBu or less
Test 16
Function: EQ (Low) frequency check
Description:
The sine wave of about 65.5 Hz (C1) is output from the [LINE
OUT] jacks (MAIN L/L+R, MAIN R, SUB1, SUB2).
When a sound is being produced.
Displayed Message:
０１６：ＥＱ Ｌｏｗ Ｃｈｅｃｋ
０１６：ＥＱ Ｌｏｗ Ｃｈｅｃｋ
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Supplement:
Sound is stopped when the test item is quit.
Test 17
Function: EQ (Mid) frequency check
Description:
The sine wave of about 524 Hz (C4) is output from the [LINE
OUT] jacks (MAIN L/L+R, MAIN R, SUB1, SUB2).
Displayed Message:
０１７：ＥＱ Ｍｉｄ Ｃｈｅｃｋ
０１７：ＥＱ Ｍｉｄ Ｃｈｅｃｋ
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Tyros4
Selected screen
When a sound is being produced.
Selected screen
When a sound is being produced.
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