Yamaha RS7000 Ver.1.2, Service Manual

Page: 51 / 97

RS7000
51
AIEB2
(option)
AS1: 1 kHz +/-1.5 Hz, sine wave, -6.5 +/-2 dBm
(10 k-ohm load) (less than 0.5% distortion)
AS2: -70 dBm or less (10 k-ohm load)
AS3: 1 kHz +/-1.5 Hz, sine wave, -6.5 +/-2 dBm
(10 k-ohm load) (less than 0.5% distortion)
AS4: -70 dBm or less (10 k-ohm load)
AS5: 1 kHz +/-1.5 Hz, sine wave, -6.5 +/-2 dBm
(10 k-ohm load) (less than 0.5% distortion)
AS6: -70 dBm or less (10 k-ohm load)
When you press the [EXIT] button the test will end, and you will
be able to select another test item.
11. 1 kHz OUTPUT R sound
This checks whether the correct signal is output from the
[OUTPUT R] and [PHONES (R)] jacks and the [AS1]--[AS6]
jacks of the AIEB2 (option).
This also checks whether the effect DRAM operates correctly.
(Test method)
Use a frequency counter, oscilloscope, and level meter (with JIS-
C filter) to measure the frequency, output waveform, and output
level of the signals that are output from the [OUTPUT L], [OUTPUT
R], [PHONES (L)], [PHONES (R)], and [AS1]--[AS6] jacks.
At this time, set the master volume to MAX.
While the sound is being output, the LCD screen will be as
follows.
(Items to check)
OUTPUT L:
-75 dBm or less (10 k-ohm load)
OUTPUT R: 1 kHz +/-1.5 Hz, sine wave, +5.0 +/-2 dBm
(10 k-ohm load) (less than 0.1% distortion)
PHONES (L): -65 dBm or less (33 ohm load)
PHONES (R): 1 kHz +/-1.5 Hz, sine wave, +5.0 +/-2 dBm
(33 ohm load) (less than 0.1% distortion)
//// RS7000 Test Program ////
11:OUTPUT-R :Press [ENTER]
[-1] [+1]
//// RS7000 Test Program ////
11:OUTPUT-R :ON
AIEB2
(option)
AS1: -70 dBm or less (10 k-ohm load)
AS2: 1 kHz +/-1.5 Hz, sine wave, -6.5 +/-2 dBm
(10 k-ohm load) (less than 0.5% distortion)
AS3: -70 dBm or less (10 k-ohm load)
AS4: 1 kHz +/-1.5 Hz, sine wave, -6.5 +/-2 dBm
(10 k-ohm load) (less than 0.5% distortion)
AS5: -70 dBm or less (10 k-ohm load)
AS6: 1 kHz +/-1.5 Hz, sine wave, -6.5 +/-2 dBm
(10 k-ohm load) (less than 0.5% distortion)
When you press the [EXIT] button the test will end, and you will
be able to select another test item.
12. A/D -> D/A (MIC)
This tests the signal route from the A/D input to D/A output. (By
default, the Gain is set to MIC.)
(Test method)
Use the following procedure to input a 1 kHz +/-5 Hz, -50.0 +/-
0.2 dBm sine wave to the [INPUT L] jack, and verify that an
output of the following level is obtained from the [OUTPUT L]
and [OUTPUT R] jacks.
At this time, set the [REC VOLUME] and [MASTER VOLUME]
to Max.
(Items to check)
Move the [REC VOLUME] knob and verify that the volume
changes.
Also verify that the LCD display ON/OFF indication changes as
the jack is plugged in or unplugged.
OUTPUT L: 1 kHz +/-5 Hz, sine wave, +4.0 +/-2 dBm
(10 k-ohm load) (less than 0.1% distortion)
OUTPUT R: -58 dBm or less (10 k-ohm load)
When you press the [EXIT] button the sound will stop, and you
will be able to select another test item.
//// RS7000 Test Program ////
12:AD-DA(MIC) :ON
Lch input :xxx
xxx:ON (when
inserted) or
OFF (when not
inserted)
//// RS7000 Test Program ////
12:AD-DA(MIC) :Press [ENTER]
[-1] [+1]