TEST END
If the test is OK, "OK" will be displayed on the LCD and
the test will be completed and proceed to the next test. If an
error is detected during the test, refer to section B,
"PROCEEDING TROUGH THE TEST".
8.
HOST SELECT TEST
(where
ZZ
: minimum value,
YY
: maximum value,
XX
: current value)
Change the [HOST SELECT] switch from [Mac] to
[MIDI], according to the order indicated on the LCD.
(when requiring to select the [PC2])
If an unexpected code is received, the system will not
proceed to the next step.
Check that "OK" is displayed at each position of the HOST
SELECT switch.
Decision value
MIDI:
0 V – 0.6 V
PC2:
1.25 V – 2.1 V
PC1:
2.8 V – 3.7 V
MAC:
4.7 V – 5 V
DISPLAY OF TEST RESULTS
OK
TEST END
When the HOST SELECT switch is set at [MIDI], if the test
is OK, the test will be completed and proceed to the next test.
During the test, if the [EXIT] button is pressed, the MU100
will wait for the entry of the test number.
If NG is detected during the test, refer to section B,
"PROCEEDING TROUGH THE TEST".
9.
TO HOST TX/RX TEST
This test is utilized by the factory and it is not intended for
field service use.
DISPLAY OF TEST RESULTS
OK
NG
TEST END
When this test is initiated without a jig for checking, an
error will occur. If an error is detected during the test, refer
to section B, "PROCEEDING TROUGH THE TEST".
10. WAVE ROM TEST
The Read/Verify check for the four WAVE ROMs via the
SWP20-LSI will be performed automatically.
DISPLAY OF TEST RESULTS
OK
NG
TEST END
If the test is OK, "OK" will be displayed on the LCD and
the test will be completed and proceed to the next test. If an
error is detected during the test, refer to section B,
"PROCEEDING TROUGH THE TEST".
11. 1 kHz SOUND OUTPUT (L) TEST
Check that the correct signal is output from the OUTPUT
(L) and the PHONES (L) jacks.
Insert the appropriate phone plug into the OUTPUT(L, R),
the PHONES and the INDIV.OUTPUT (1,2) jacks and
check the output. If necessary, verify the frequency, output
waveform, output level, and THD of the OUTPUT (L,R)
and the PHONES output using a frequency counter,
oscilloscope, AC voltmeter(with 12.47 kHz filter) and
distortion meter. If a plug is inserted to the A/D INPUT, it
must be pulled out. The VOLUME control must be set at
maximum for this check.
ITEMS TO BE CHECKED
OUTPUT (L):
1 kHz +/-3 Hz, sin wave, +2.0 dBm +/-2
dB (10 k ohm load), distortion 0.25 % or
less
OUTPUT (R):
less than -80 dBm
PHONES (L):
1 kHz +/-3 Hz sin wave, -4.5 dBm +/-2
dB (33 ohm load), distortion 0.5 % or less
PHONES (R):
less than -65 dBm
INDIV.OUTPUT1: less than -80 dBm
INDIV.OUTPUT2: less than -80 dBm
If the plug connected to the OUTPUT (R) is pulled out:
OUTPUT (L):
-3.0 dBm +/-2 dB
TEST END
Press the [ENTER] button. The MU100 will then
automatically proceed to the next test.
If the [EXIT] button is pressed, the MU100 will wait for
the entry of the test number.
MU100
19
08 HOST SELECT
Mac ZZ--YY=XX
08 HOST SELECT
PC2 ZZ--YY=XX
08 HOST SELECT
ok
09 TO HOST
09 TO HOST
ok
09 TO HOST
err
10 WAVE ROM
ok
10 WAVE ROM
err
10 WAVE ROM
11 OUTPUT L 1 kHz
