Yamaha A4000, Руководство по обслуживанию

Страница: 25 / 61

A5000/A4000
25
When inserting in the REC IN-R
STEREO OUT-L: less than -55 dBm
STEREO OUT-R: 1 kHz +/- 1.5 Hz, sine wave, less than 3.0% distortion
-1 +/- 4 dBm (10 k ohm load)
RESULT OF THE TEST
No display
END OF THE TEST
After pushing the [ENC5] STOP, the test will be finished.
16 REC IN (LINE) / SPF
Insert the appropriate phone plugs into the STEREO OUT-L, R
terminals. Check the output wave form and the output level of each
output by using an oscilloscope, an AC voltmeter (with JIS-C filter)
and a distortion factor meter. The REC GAIN and the MASTER
VOLUME control must be set at maximum for these checks.
Input sine wave signal : -17 dBm, 1 kHz +/- 1 Hz, less than 0.005%
distortion
impedance 600 ohm
When inserting in the REC IN-L
STEREO OUT-L: 1 kHz +/- 1.5 Hz, sine wave, less than 2.5% distortion
-1 +/- 4 dBm (10 k ohm load)
STEREO OUT-R: less than -65 dBm
When inserting in the REC IN-R
STEREO OUT-L: less than -65 dBm
STEREO OUT-R: 1 kHz +/- 1.5 Hz, sine wave, less than 2.5% distortion
1 +/- 4 dBm (10 k ohm load)
RESULT OF THE TEST
No display
END OF THE TEST
After pushing the [ENC5] STOP, the test will be finished.
17 MUTE
If the test is executed, a 1 second sound and a 1 second mute are
repeated alternately twice. Check by listening that the output from
the STEREO OUT-R terminal will not sound while muting.
While executing, the LCD will show the following test condition.
While sounding
While muting
RESULT OF THE TEST
OK / NG
END OF THE TEST
After displaying the result, the test will be finished.
18 ASSIGNABLE OUT-1
Insert the appropriate phone plugs into the ASSIGNABLE OUT-1
terminal. Check the output wave form and the output level of each
output by using an oscilloscope, an AC voltmeter (with JIS-C filter)
and a distortion factor meter. Check that the followiing signal is
output.
ASSIGNABLE OUT-1: 1 kHz +/- 1 Hz, sine wave, less than 0.5%
distortion
0 +/- 3 dBm (10 k ohm load)
ASSIGNABLE OUT-2: less than -70 dBm (10 k ohm load)
While sounding, the LCD shows as below.
RESULT OF THE TEST
No display
END OF THE TEST
After pressing the [ENC5] STOP, the test will be finished.
19 ASSIGNABLE OUT-2
Insert the appropriate phone plugs into the ASSIGNABLE OUT-2
terminal. Check the output wave form and the output level of each
output by using an oscilloscope, an AC voltmeter (with JIS-C filter)
and a distortion factor meter. Check that the followiing signal is
output.
ASSIGNABLE OUT-1: less than -70 dBm (10 k ohm load)
ASSIGNABLE OUT-2: 1 kHz +/- 1 Hz, sine wave, less than 0.5%
distortion
0 +/- 3 dBm (10 k ohm load)
While sounding, the LCD shows as below.
RESULT OF THE TEST
No display
END OF THE TEST
After pressing the [ENC5] STOP, the test will be finished.
M u t e O f f
1 6 : R E C I N ( L I N E ) / S P F
AUTO MANUAL
1 7 : M U T E
AUTO MANUAL
M u t i n g
O u t p u t o n
O u t p u t o n
1 8 : A S S I G N A B L E O U T - 1
AUTO MANUAL
1 9 : A S S I G N A B L E O U T - 2
AUTO MANUAL