Yamaha TF1, Руководство по обслуживанию

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TF5/TF3/TF1
160
C. ST IN
No. Item Condition Input Output Criteria Remarks
1 Gain
Test Command : STIN
ST IN 1 L/R
ST IN 2 L/R
1kHz +10dBV
OMNI OUT 1-4
+24.0 ± 2.0 dBu
2 Frequency Response
ST IN 1 L/R
ST IN 2 L/R
1kHz 0dBV
1kHz : 0dB (reference)
20Hz : -0.5 ± 1.0 dB
20kHz : -0.5 ± 1.0 dB
3 THD + N
ST IN 1 L/R
ST IN 2 L/R
1kHz +10dBV
≦
0.02 % 80kHz LPF
4 Noise Level
Short input with 150 Ω
ST IN 1 L/R
ST IN 2 L/R
≦
-77 dBu 22kHz LPF
D. PHONES OUT
No. Item Condition Input Output Criteria Remarks
1 Gain
Test Command :
DA_MAX
Internal Oscillator
(Automatically set)
PHONES L/R
+9.0 ± 1.0 dBu
2 Frequency Response
Test Command :
DA_AUDIO
INPUT1,2
1kHz +4dBu
1kHz : 0dB (reference)
20Hz : -0.5 ± 1.0 dB
20kHz : -0.5 ± 1.0 dB
3 THD + N
Test Command :
DA_MAX
Internal Oscillator
(Automatically set)
≦
0.05 % 80kHz LPF
4 Noise Level
Test Command :
DA_NOISE
Internal - ∞
(Automatically set)
PHONES LEVEL
Max :
≦
-79 dBu
Min :
≦
-93 dBu
22kHz LPF
E. Measurement of Analog Mute
Item Condition Input Output Criteria Remarks
Analog Mute
Test Command :
DA_AMUTE
Internal Oscillator
(Automatically set)
OMNI OUT 1-16
≦
-23 dBu
PHONES L/R
≦
-23 dBu
F. Phantom Power Supply
This measurement can be represented by following INPUT channel.
TF5 : INPUT 1,9,17,25
TF3 : INPUT 1,9,17
TF1 : INPUT 1,9
Connect load resistance 10k
Ω between pin No.1 and 2. Short pin No.2 and 3 with 0 Ω .
If the case of [HAAD_48V_ON]
Con fi rm that it is within a range of DC 33.6V ~ 36.1V.
If the case of [HAAD_48V_OFF]
After s48V OFF, check discharge starts promptly.
SETTINGS FOR SHIPMENT
● Initialization
Refer
"Initialization"
the (198 page).
●
Knobs Setting
･
PHONES LEVEL : Min. (Full C.C.W. position)
･
FADER : Min. (- ∞ )
･
POWER Switch : OFF