Yamaha Tyros4, Service Manual

Page: 75 / 173

75
Tyros4
０１５：Ｏｕｔｐｕｔ Ｓｕｂ−２ Ｃｈｅｃｋ
−−
When a sound is being produced.
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).
Displayed Message:
０１６：ＥＱ Ｌｏｗ Ｃｈｅｃｋ
Selected screen
０１６：ＥＱ Ｌｏｗ Ｃｈｅｃｋ
−−
When a sound is being produced.
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
Selected screen
０１７：ＥＱ Ｍｉｄ Ｃｈｅｃｋ
−−
When a sound is being produced.