Boss DD-20(T)超级延时效果器维修手册,本音响维修电路图为电子版，页数：29页------Input a sine wave (200 Hz, 16Vp-p) from the oscillator to INPUT
A(MONO) and B.• Connect the oscilloscope to OUTPUT A(MONO) and B.• Rotate the E.LEVEL volume from the far left (minimum) to far right
(maximum). Confirm that the LCD changes from “O” to “127” and thatthe waveform output from OUTPUT A(MONO) and B changes from
minimum to maximum size.Rotate the F.BACK volume from the far left (minimum) to far right(maximum). Confirm that the LCD changes from “O” to “127” and thatthe waveform output from OUTPUT A(MONO) and B changes fromminimum to maximum size.Rotate the TONE volume from the far left (minimum) to far right(maximum). Confirm that the LCD changes from “O” to “127” and thatthe waveform output from OUTPUT A(MONO)and B changes fromminimum to maximum size.Rotate ENC at least two clicks from the
