Yamaha PSR-420 Owner's Manual - Page 64

Appendix: Troubleshooting Something not working as it should? In many cases what appears to be a malfunction can be traced to a simple error that can be remedied immediately. Before assuming that your PSR-320/420 is faulty, please check the following points. PROBLEM The speakers produce a "pop" sound whenever the power is turned ON or OFF. Reduced volume. Poor sound quality. Improper song playback. "Btry Low" sometimes appears. Display has gone out and the panel setting has been set to default. No sound when the keyboard is played. Not all simultaneously-played notes sound. Auto accompaniment won't function properly. No lower keyboard sound. The selected voice does not sound when the keyboard is played. Rhythm doesn't sound when started. Operation of the sustain pedal is reversed. The desired parameter cannot be edited. Accompaniment does not play properly. The Harmony/Dual Voice/Digital Effect function will not turn on. Cartridge data cannot be selected or cannot be played back correctly. Individual registration or song memory data transmitted via bulk dump from an external sequencer or other device is not received by the PSR-320/420. POSSIBLE CAUSE/SOLUTION This is normal and is no cause for alarm. The batteries probably need to be replaced. Replace all six batteries with new ones of the same type, as described on page 6. The Local Control function could be turned off. Make sure Local Control is turned on (page 59). You are probably exceeding the maximum polyphony of the PSR-320/420. The PSR-320/420 can play up to 28 notes at the same time - including split, dual, autoaccompaniment, song memory, and multi pad notes. Notes exceeding this limit will not sound. Auto accompaniment won't sound right if you're using SINGLE FINGER type fingering when the SINGLE FINGER mode is not selected (page 22). Are you sure you're playing in the Auto-Accompaniment section of the keyboard? Are you playing chords that the PSR-320/420 can recognize (see chord types on page 23)? Make sure that the Keyboard Volume, Split Voice Volume, and/or Dual Voice Volume parameters are set at an appropriate level (pages 53, 16, and 18). Some sections of some styles do not use the accompaniment rhythm track. Sustain pedal operation will be reversed if you turn on the power or plug in the pedal while pressing the pedal. For normal operation turn off the power then turn it back on while the pedal is not pressed. The cursor is not located at the parameter to be edited. Make sure that the cursor is located at the parameter to be edited (the parameter should be flashing). Make sure that the accompaniment tracks you want to hear are not muted (page 29), and that the Accomp Volume parameter is turned up to a reasonable level (page 54). Neither of these functions can be turned ON if a percussion kit voice is selected. Make sure a voice between number 01 and 141 is selected. The Harmony effect cannot be turned ON when the FINGERED FULL mode is in use. Make sure that an appropriate Yamaha Music Cartridge is properly plugged into the cartridge slot (page 44). The electrical contacts on the Music Cartridge are affected with dust. Insert and remove the Music Cartridge several times. This may solve the problem. If the problem still happens, wipe and clear the electrical contacts on the Music Cartridge with a dry soft cloth. Transmit the data with no more than a 2-second break between blocks, or transmit as entirely separate data. 63