Instructions For Factory Reset; Test Mode - Roland Boss RC-20XL Service Notes

Sep.2004

INSTRUCTIONS FOR FACTORY RESET

The RC-20XL can be restored to its original factory settings with the following
procedure.
Restoring the factory settings with this procedure requires another RC-20XL
currently programmed with the factory settings.
Procedure
1.
Turn on the power to the RC-20XL that is to have the factory settings
restored.
2.
Turn the PHRASE SELECT knob to "1."
3.
Hold down SHIFT(EXIT) and press the DELETE(WRITE) button, causing
the two indicators to flash.
The RC-20XL is put in delete standby.
4.
Press the DELETE(WRITE) button.
The indicator lights while the delete is in progress; when the delete is finished,
the indicator light goes off.
Do not turn off the power to the unit while the WRITE indicator or EXIT
indicator is lit.
All data saved to the Phrase tracks is completely deleted.
5.
Repeat Steps 2-4 above for the PHRASE SELECT knob settings "2" to "4."
6.
Turn off the power to the unit.
7.
As per the instructions for "Serial Dump" above, set the RC-20XL to
which the factory settings are being loaded as the receiving device and
the RC-20XL already containing the factory settings as the transmitting
device.
1) When the settings are transmitted, the [TAP TEMPO] indicator in Step 4 of
"Serial Dump" is green.
2) Set PHRASE SELECT VOLUME to "5" to execute transmission/reception of
the data.
8.
Set PHRASE SELECT VOLUME to "6" and repeat the procedure for 6 to
11.
9.
Turn off the power to the unit.
10. Confirm that the phrases with the factory settings are saved to PHRASE
SELECT VOLUME 5-11.

TEST MODE

Test items
1.
FLASH ROM check
2.
Version number check
3.
Switch and LED check
4.
LEVEL volume check
5.
GUIDE volume check
6.
DA check
7.
Output check
8.
INST volume check
9.
MIC volume check
10. MUTE check
11. AUX IN (NORMAL) check
12. AUX IN (FLAT AMP SIMULATE) check
13. AUX IN (CENTER CANCEL) check
14. AUX IN (L ch) check
15. solder spot check
14
16. PHRASE SELECT volume check
17. Noise check
18. Battery operation check
Items required for tests
• Oscillators x 2
• Oscilloscope
• Noise meter
• Monitor amp
• FS-5U x 2
• 1k ohm stereo mini short plug:(#17041376)
• 150 ohm short plug:(#17041511)
• 47k ohm short plug:(#17041375)
• Parallel box(BOSS J-5 etc.)
• +9V DC PLUG(AC ADAPTOR BOSS PSA-series)
• Stereo phone <-> monaural phone conversion cable(PCS-31 ect.)
• Stereo mini <-> monaural phone conversion cable
Entering test mode
• Refer to the following figure and connect the diagnostic equipment.
fig.setuzokuzu-e
Monitor Amp
Noise Meter OSCILLOSCOPE
or or
CH1 CH2
(0.5V/DIV,1mS/DIV)
9V PLAG
PSA ADPTOR
GND
R
L
• Set all volumes to minimum.
• While hoding the left pedal and right pedal, connecte the adaptor to the
AC ADAPTOR JACK to trun on the power.
When only the POWER LED is lit, within two seconds press the left pedal and
then the right pedal.
• You will enter Test mode, and all LEDs other than "PEAK" will either
light or blink.
A FLASH ROM check is automatically performed when you enter Test mode.
The state of the LEDs when you enter
Test mode will depend on the result of this test. For details refer to the
following item "1. FLASH check."
For details on how to skip directly to a desired test item, refer to "Skipping
directly to the desired test," following the explanations of each test item.
150K
47K
FS-5U x 3
Parallel BOX
R side L side
GND GND
J-5
AUX :
MIC :
INST :
Ocillator
200mVp-p
Ocillator
-37dBm