Boss RC-30 Service Notes page 16

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Mar. 2011
3. LED & SW Check
1.
Verify that all LEDs and the 7-segment LED display are dark.
2.
Press each button in the sequence shown in the table below, and verify
that the corresponding LED lights up.
Button
1
LOOP FX TYPE
2
LOOP FX ON/OFF
3
TRACK 1 SELECT
4
TRACK 2 SELECT
5
WRITE
6
DELETE
7
RHYTHM TYPE
8
RHYTHM ON/OFF
9
RHYTHM TAP TEMPO
10
11
12
Left pedal
* Pressing LOOP FX TYPE once makes the corresponding LEDs described above
light up in sequence, one at a time.
* Depressing the left pedal once makes the two digits of the 7-segment LED
display light up one segment at a time.
3.
Finally, depress the right pedal to advance to the next test item.
4. VR Test
1.
Verify that 10 is shown on the 7-segment LED display.
2.
Slowly move the TRACK 1 slider from minimum to maximum, and
verify that the reading on the 7-segment LED display changes as shown
below.
10 -> 11 -> 12 -> 13 -> 14 -> 15 -> 16 -> 17 -> 18
* When the slider is at center, 14 is displayed.
When the values from MIN to MAX have been detected correctly,
execution automatically advances to the next VR (potentiometer) test.
3.
Verify that 20 is shown on the 7-segment LED display.
4.
Slowly move the TRACK 2 slider from minimum to maximum, and
verify that the reading on the 7-segment LED display changes as shown
below.
20 -> 21 -> 22 -> 23 -> 24 -> 25 -> 26 -> 27 -> 28
* When the slider is at center, 24 is displayed.
When the values from MIN to MAX have been detected correctly,
execution automatically advances to the next VR (potentiometer) test.
5.
Verify that r0 is shown on the 7-segment LED display.
6.
Slowly turn the RHYTHM OUTPUT LEVEL control from MIN to MAX,
and verify that the reading on the 7-segment LED display changes as
shown below.
r0 -> r1 -> r2 -> r3 -> r4 -> r5 -> r6 -> r7 -> r8
* When the control is at center, r4 is displayed.
When the values from MIN to MAX have been detected correctly,
execution automatically advances to the next test item.
16
Illuminated LED
BEND DOWN
STEP PHASER
SWEEP FILTER
TEMPO DELAY
Lo-Fi
LOOP FX ON/OFF
TRACK 1 SELECT
TRACK 2 SELECT
TRACK 1 STATUS
TRACK 2 STATUS
RHYTHM TYPE
RHYTHM ON/OFF
RHYTHM TAP TEMPO (red)
REC
PLAY
7-segment LED display
5. CTL PEDAL Test
1.
Verify that F1 is shown on the 7-segment LED display.
2.
Depress the FS-5U connected to the FOOT SW jack (tip end).
The reading on the 7-segment LED display changes to F2.
3.
Depress the other FS-5U pedal (ring end).
The reading on the 7-segment LED display changes to FJ.
4.
Detach the plug from the FOOT SW jack.
When correct detection occurs, execution automatically advances to the
next test item.
6. USB Test
1.
Verify that US is shown on the 7-segment LED display.
2.
Disconnect the USB cable.
When correct detection occurs, execution automatically advances to the
next test item.
7. DA Test (A1)
1.
Verify that A1 is shown on the 7-segment LED display.
2.
Make the following settings on the oscilloscope.
Channel 1 (OUTPUT L):
200 mV/DIV, 1.00 ms/DIV
Channel 2 (OUTPUT R): 200 mV/DIV, 1.00 ms/DIV
Coupling:
DC
The mute circuit is repeatedly switched on and off automatically.
3.
Verify the waveforms on channel 1 and channel 2. Also verify that the
peak value is at 700 to 800 mVp-p.
fig.audio-1.eps
fig.audio-2.eps
RC-30

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