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The waveform was measured with a National Digital Storage Oscilloscope VP-5730A. Therefore the waveforms of musical tone signals shown may differ somewhat due to the difference in the timing of triggering.
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Since the 1/10 test probe is used, the indicated voltage value on the bottom part of each waveform illustration is 1/10 of the actual value (e.g. 0.2 V/cm should be 2.0 V/cm).
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To measure the waveforms, first set this unit to the service diagnostic mode (refer to WAVE ROM test). The WAVE ROM output will then be output as a sine wave to facilitate the servicing check.