Roland ME-80, Заметки по обслуживанию

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21
Jan. 2014 ME-80
6.
Verify that
9
is shown on the 7-segment LED display.
fig.test3-34.eps
4. EXP VR Check
The 7-segment LED display shows Pd , then UP appears.
fig.test4-1.eps
1.
Depress the heel side of the expression pedal all the way and press
WRITE .
dn
appears on the 7-segment LED display.
fig.test4-2.eps
2.
Depress the toe side of the expression pedal all the way and press
WRITE
.
5 appears on the 7-segment LED display.
fig.test4-3.eps
3.
Depress the toe side of the expression pedal more forcefully and verify
that the
PEDAL FX LED lights up.
4.
Again depress the toe side of the expression pedal forcefully and verify
that the
PEDAL FX LED goes dark.
5.
Verify that a screen like the one shown below appears on the 7-segment
LED display.
fig,test4-4.eps
6.
Press
WRITE
to advance to the next test item.
5. AUDIO Check
The 1 LED lights up.
Verify that
AU
is shown on the 7-segment LED display.
fig.test5-1.eps
D/A Check
1.
Make the settings shown below on the oscilloscope and connect it to the
Gt. AMP OUTPUT L/MONO
and
R
jacks.
ch1: 2.00 V/div, ch2: 2.00 V/div, TIME: 1.00 ms/div
2.
Depress the pedal 2 .
The
2
LED lights up.
3.
Verify that the output value is between
4.9
and
5.2 Vp-p
.
fig.test5-2.eps
4.
Press
CTL
.
The DELAY LED lights up.
29 30
No. VR knob VR position and reading on the 7-segment LED display
29 OUTPUT LEVEL fig.test3-35-e.eps
30 PEDAL FX TYPE fig.test3-36-e.eps