Yamaha RS7000 Ver.1.2, Service Manual

Page: 50 / 97

RS7000
50
10. 1 kHz OUTPUT L sound
This checks whether the correct signal is output from the
[OUTPUT L] and [PHONES (L)] 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:
1 kHz +/-1.5 Hz, sine wave, +5.0 +/-2 dBm
(10 k-ohm load) (less than 0.1% distortion)
OUTPUT R: -75 dBm or less (10 k-ohm load)
PHONES (L): 1 kHz +/-1.5 Hz, sine wave, +5.0 +/-2 dBm
(33 ohm load) (less than 0.1% distortion)
PHONES (R): -65 dBm or less (33 ohm load)
9. MIDI IN/OUT B
This checks the operation of MIDI IN/OUT B by using a test
pattern (AA EF 00 55).
(Test method)
Before executing this test, use a MIDI cable to connect [MIDI
IN] and [MIDI OUT B].
The result of the test will be displayed in the LCD screen. The
test will end, and you will be able to select a different test item.
//// RS7000 Test Program ////
09:MIDI B :Press [ENTER]
[-1] [+1]
//// RS7000 Test Program ////
10:OUTPUT-L :Press [ENTER]
[-1] [+1]
//// RS7000 Test Program ////
10:OUTPUT-L :ON
[-1] [+1]
(Test result display)
OK
//// RS7000 Test Program ////
08:MIDI A :OK
[-1] [+1]
NG
//// RS7000 Test Program ////
08:MIDI A :NG
[-1] [+1]
//// RS7000 Test Program ////
08:MIDI A :NG TIME OUT
[-1] [+1]
If the expected data was not received If reception was not completed within
a specific time
(Test result display)
OK
//// RS7000 Test Program ////
09:MIDI B :OK
[-1] [+1]
NG
//// RS7000 Test Program ////
09:MIDI B :NG
[-1] [+1]
//// RS7000 Test Program ////
09:MIDI B :NG TIME OUT
[-1] [+1]
If the expected data was not received If reception was not completed within
a specific time