Yamaha QY100 Data Filer, Service Manual, Page: 26 / 80

QY100
26
LCD Display
08:HOST SELECT
Select MIDI OK
Nothing appears on the display unit for NG.
Test End
When all the switches are checked, OK will appear on the
display unit and testing will end. For what to be done when
an NG judgment is made during testing, refer to B. HOW
TO PROCEED TESTING.
10. WAVE ROM TEST
Initial Display
LCD Display
QY100 TEST MANUAL
MAIN ROM Ver=#.##
SUB CPU Ver=#.##
10:WAVE ROM
[ENTER]:Test Start
[-1,+1]:INC,DEC
[F4]:Exit
Test Content
This test executes the read test of WAVE ROM
Display of Result
OK
10:WAVE ROM
OK
NG
10:WAVE ROM
NG
The test ends after the test result is displayed.
11. PCM SINE WAVE OUTPUT (L) TEST
Initial Display
QY100 TEST MANUAL
MAIN ROM Ver=#.##
SUB CPU Ver=#.##
11:PCM SIN 880Hz L
[ENTER]:Test Start
[-1,+1]:INC,DEC
[F4]:Exit
Insert the jack into OUTPUT (L, R) and measure the
frequency and level of the signal output from OUTPUT-L
with the frequency counter and level gauge respectively.
While the sound is being output, the following message
appears on LCD.
11:PCM SIN 880Hz L
OK
Check Item
When the volume is at the center (the level where the
waveform does not clip):
Sine wave of 880Hz
±
3Hz (Load 33 ohm)
Distortion of 1.0% or less (Load 33 ohm JIS C filter)
When the volume is at the minimum:
-70dBm or less (Load 33 ohm JIS C filter)
Test end
AUO mode: Pressing the [+1] key will end the sound output
and “12. PCM SINE WAVE OUTPUT (R) “ test will be
executed.
MANUAL mode: Pressing the [F4] key will end the sound
output and the program will be in the test number input wait
state.
12. PCM SINE WAVE OUTPUT (R) TEST
Initial Display
QY100 TEST MANUAL
MAIN ROM Ver=#.##
SUB CPU Ver=#.##
12:PCM SIN 880Hz R
[ENTER]:Test Start
[-1,+1]:INC,DEC
[F4]:Exit
Insert the jack into OUTPUT (L, R) and measure the
frequency and level of the signal output from OUTPUT-R
with the frequency counter and level gauge respectively.
While the sound is being output, the following message
appears on LCD.
12:PCM SIN 880Hz R
OK
Check Item
When the volume is at the center (the level where the
waveform does not clip):
Sine wave of 880Hz
±
3Hz (Load 33 ohm)
Distortion of 1.0% or less (Load 33 ohm JIS C filter)
When the volume is at the minimum:
-70dBm or less (Load 33 ohm JIS C filter)