Yamaha CP50 Owner's Manual - Page 54

Appendix Troubleshooting The output from the stage piano sounds distorted.  Ensure that the volume is not too high. Check the input levels of any mixer or amplifier connected to your CP5 or CP50. If lowering the input gain or pressing the corresponding pad button does not remove the distortion, try lowering the stage piano's output volume.  Ensure that the Pre-Amplifier blocks, the Modulation Effect blocks, and the Power-Amplifier / Compressor blocks (CP5 only) are set appropriately. Certain combinations of settings can produce distortion. Press and hold (for at least one second) the [PRE-AMP], [MOD-FX], and [PWR-AMP]* buttons. (See the Reference Manual pdf document for more details.) (*: CP5 only) Sound output is intermittent and stuttered.  If the total number of notes being played by all parts is too high, the stage piano's output may become intermittent and stuttered. Unexpected pitches are produced.  Ensure that transpose and tuning parameters are set to 0. Press the [TRANSPOSE] button  Turn Knob 1 to set the Transpose parameter. Press the [UTILITY] button  Jump to Page 1 by pressing the [1] button  Turn Knob 1 to set the MasterTune parameter.  Ensure that note shift and detune parameters for the left and right parts are set to 0. Press and hold (for at least one second) the Part button for each of the left and right parts  Jump to Page 2 by pressing the [2] button  Turn Knobs 1 and 2 to set the NoteSht and Detune parameters. A Pre-Amplifier, Modulation Effect, or Power-Amplifier / Compressor* block or the Reverb block has no effect on the final sound. (*: CP5 only)  Ensure that the [PRE-AMP], [MOD-FX], [PWR-AMP] (CP5 only), and [REVERB] buttons are turned on as required. If a Block button is turned off (i.e., if the lamp to its top-left is not lit), its respective block will also be off and will not affect the sound in any way. To remedy this situation, press the Block button and confirm that its lamp lights up.  In cases where a Pre-Amplifier block seems to be having no effect on the sound, ensure that a voice from the PIANO or E.PIANO category has been assigned to the part in question. Voices from other categories are not affected in any way by this block.  In cases where a Modulation Effect block seems to be having no effect on the sound, ensure that its parameters have been set appropriately. Press and hold the [MOD-FX] button (for at least one second). (See the Reference Manual pdf document for more details.) 54 CP5/CP50 Owner's Manual