Yamaha Tyros4, Руководство по обслуживанию

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Tyros4
74
Test 13
Function: Output Level L check
Description:
Connect a level meter (JIS-C curve) to each jack. ([PHONES]
L, R, [LINE OUT MAIN] L/L+R, R, [AUX OUT/LOOP
SEND] L/L+R, R, [TO SUB WOOFER R] L, R)
Set the [MASTER VOLUME] to the maximum level and
check the output level of the L channel.
[PHONES] L, R
(33
Ω load (30 Ω is acceptable as well: -0.6 dB))
• PHONES L: -1.5±2 dBu
• PHONES R: -45.0 dBu or less
[LINE OUT MAIN] L/L+R, R
(10 k
Ω load (2 monaural jacks used simultaneously))
• LINE OUT MAIN L/L+R: +9.5±2 dBu
• LINE OUT MAIN R:
-65.0 dBu or less
[AUX OUT/LOOP SEND] L/L+R, R
(10 k
Ω load (2 monaural jacks used simultaneously))
• AUX OUT/LOOP SEND L/L+R: +5.0±2 dBu
• AUX OUT/LOOP SEND R:
-75.0 dBu or less
[TO SUB WOOFER R] L, R
(470
Ω load (L side: between 6P–3P, R side: between
5P–3P, GND: 3P))
• TO SUB WOOFER R L: +6.0±2 dBu
• TO SUB WOOFER R R: -55.0 dBu or less
Disconnect the headphone and connect the optional speakers
to the left and right speaker terminals.
Con
fi rm that the sound comes out only left speaker.
Displayed Message:
０１３：Ｏｕｔｐｕｔ Ｌ Ｃｈｅｃｋ
Selected screen
０１３：Ｏｕｔｐｕｔ Ｌ Ｃｈｅｃｋ
−−
When a sound is being produced.
Supplement:
Sound is stopped when the test item is quit.
Test 14
Function: Output Level Sub-1 check
Description:
Set the [MASTER VOLUME] to the maximum level.
Connect a level meter (JIS-C curve) to the SUB1/
SUB2 of [LINE OUT] terminal. (Load should be 10 k
Ω )
• LINE OUT SUB1: +3.0±2 dBu
• LINE OUT SUB2: -75.0 dBu or less
Displayed Message:
０１４：Ｏｕｔｐｕｔ Ｓｕｂ−１ Ｃｈｅｃｋ
Selected screen
０１４：Ｏｕｔｐｕｔ Ｓｕｂ−１ Ｃｈｅｃｋ
−−
When a sound is being produced.
Supplement:
Sound is stopped when the test item is quit.
Test 15
Function: Output Level Sub-2 check
Description:
Set the [MASTER VOLUME] to the maximum level.
Connect a level meter (JIS-C curve) to the SUB1/
SUB2 of [LINE OUT] terminal. (Load should be 10 k
Ω .)
• LINE OUT SUB1: -75.0 dBu or less
• LINE OUT SUB2: +3.0±2 dBu
Displayed Message:
０１５：Ｏｕｔｐｕｔ Ｓｕｂ−２ Ｃｈｅｃｋ
Selected screen