Roland Boss ME-50 Service Notes page 16

fig.test-22_50
[Mute On]
fig.test-21_50
• Confirm that the LINE/PHONES waveform changes accordingly, as
shown in the figures below.
• Confirm that the value for the waveform amplitude is between 600 and
850 (mVp-p).
[Mute Off]
fig.test-23_50
[Mute On]
fig.test-24_50
Press the [ ] switch to proceed to the next step.
9. DRAM Check
fig.test-25_70
• Oscilloscope Settings: Ch1: 0.2 V/div; Ch2: 0.2 V/div; TIME: 0.5 ms/div
• Connect the cable only to the OUTPUT L(MONO) jack, then confirm that
the waveform from OUTPUT is smooth, as shown in the figure below.
• Confirm that the value for the waveform amplitude is between 330 and
470 (mVp-p).
fig.test-26_50
• Example of bad waveform: waveform is stepped
ME-50
17