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MU128
9. MIDI 3 B
Use a MIDI cable and connect the
to the MIDI OUT connector. Then perform the test.
Before starting the test, select MIDI under HOST SELECT.
09 MIDI 3 B
The test pattern (AA 50 5F) will be sent from MIDI
OUT and received by MIDI IN B. The result of the test
pattern received will then be judged.
Displaying the test result
OK
09 MIDI 3 B
NG
09 MIDI 3 B
10. MIDI 4
Use two MIDI cables and connect the MIDI IN A (rear)
and MIDI IN B connectors to the MIDI OUT and MIDI
THRU connectors respectively. Then perform the test.
Bef ore s tarti ng th e tes t, s elect MIDI t he H OST
SELECT.
10 MIDI 4
The test pattern (AA 50 5F) will be sent from MIDI
OUT and received by MIDI IN A. The data output from
MIDI THRU will be received by MIDI IN B. The result
of the test pattern and data received will be judged.
Displaying the test result
OK
10 MIDI 4
NG
10 MIDI 4
11. HOST SELECT
11 HOST SELECT
Mac
ZZZ-YYY= XXX
(ZZZ=Lower limit, YYY=Upperlimit, XX= Measured
value)
Change MAC over to PC-1, PC-2, and MIDI in
sequence under HOST SELECT in accordance with
the host name displayed on the LCD and make sure
that the switch is functioning properly.
Displaying the test result
OK
11 HOST SELECT
NG
None
20
MIDI IN B connector
ok
err
ok
err
ok
12. TO HOST TX/RX
12 TO HOST
The test is for factory inspection before shipment.
The test will not be performed here.
Testing without a test-specific jig will result in an error.
To eliminate any error, refer to "B. Starting the tests."
13. WAVE ROM
13 WAVE ROM
Read and verify four WAVE ROM data through SWP30.
Displaying the test result
OK
13 WAVE ROM
NG
13 WAVE ROM
IC xx
(xx : IC number with an error)
14.
1 kHz OUTPUT (L) sound
14 OUTPUT L 1 kHz
Make sure that the proper signals are being output
from OUTPUT (L) and PHONES (L).
Note 4:
Insert the plugs into the OUTPUT (L, R) and PHONES
terminals and measure the frequency, waveform and level of
individual signals output. Before starting the measurement,
make sure that the plug is not inserted into the AD/ INPUT
terminal. Also set the master volume at maximum.
Check items
OUTPUT (L) : 1 kHz +/- 3 Hz, Sine wave,
+3.0 dBm +/- 2 dB (Load: 10 k ohm)
Distortion factor 0.25 % or less
OUTPUT (R) : -80 dBm or less
PHONES (L) : 1 kHz +/- 3 Hz, Sine wave,
-4.0 dBm +/- 2 dB (Load: 33 ohm)
Distortion factor 0.5 % or less
PHONES (R) : -65 dBm or less
Ending the test
Press the [ENTER] button. You will then go to the
next test.
ok
err
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