Boss RE-20 COSM Service Notes page 20

May, 2007
4.
Verify that the waveform shown below is output.
* Position where clipping disappears
fig.check005.eps_48
2 V/DIV, 1 ms/DIV
* When INPUT VOLUME is set at the MIN position
fig.check006.eps_48
2 V/DIV, 1 ms/DIV
20
8. Analog Bypass-path FET Switch Operation
Check
1.
Input the signal to both INPUT A (MONO) and INPUT B.
• INPUT A (MONO): Rectangular wave 200 Hz, 500 mVp-p
• INPUT B: Rectangular wave 200 Hz, 500 mVp-p
2.
Adjust INPUT VOLUME to MAX.
3.
Verify that the waveform shown below is output.
fig.check007.eps_48
500 mV/DIV, 1 ms/DIV
4.
Depressing the right pedal makes the output waveforms from both
OUTPUT A (MONO) and B disappear.
* The rightmost and center Virtual Tape Display LEDs light up.
5.
Verify that the waveform shown below is output.
fig.check008.eps_48
500 mV/DIV,1 ms/DIV
6.
After verification, advance to the next test.
RE-20