Roland PC-70 - Manual (Page 23)

23
Troubleshooting
Q: The unit cannot be switched on; or it doesn’t work at all.
A: Check if you are using the attached AC adaptor. Use only the attached adaptor—using
any other adaptor may result in damage, malfunction or electric shock.
Q: The sound module does not respond to the movement of the DATA ENTRY slider.
A: Check if the correct function is assigned to the DATA ENTRY slider. Also, note that the
module will sometimes not respond if the slider is moved only slightly. If you are
unsure, pull the slider all the way down first and then set it to the desired position.
Q: The sound you have requested cannot be selected.
A: Some GS modules, such as those in the Sound Canvas series, have a switch which allows
you to turn on or off the reception of Program Change messages and/or Bank Select
messages. Be sure this switch is turned ON.
A: Could the sound module have received a GM System On message (the message that
orders a module to function as a General MIDI sound module) before you sent Bank
Select messages? Since Bank Selects are not recognized in the General MIDI System Level
1 specifications, the module will ignore them if it is currently behaving as a General
MIDI device. To correct this situation, send a GS Reset message (which retrieves the GS
default settings), or simply switch the module off, then on again.
* The PC-70 cannot transmit GS Reset messages.
A: When specifying the change in sound, did you supply the complete set of values (values
for CC 00/CC 32 and Program Number)? When a change in sound is made using the PC-
70, the complete set of three values (value for CC 00 and CC 32, then the Program
number) is transmitted, even if only the Program Number has been specified. Note also
that the values for a sound selection remain stored in memory until the next sound has
been successfully selected. So, if even one out of the complete set of three values is
mistakenly not supplied, part of the previous values could be sent along with the newly
specified ones. As a result, you might not obtain the sound you hoped for.
A: Does your computer music application use Program Numbers 0 to 127 for sound
selection? Since the PC-70 uses numbers 1 to 128, you may need to add one to the
number being selected to obtain the correct sound.
Q: The GS module does not respond to Aftertouch messages.
A: A GS sound module will not respond to Aftertouch messages when it’s in its default
mode. Therefore, you need to set the Aftertouch parameters using Exclusive messages.
(Refer to the MIDI Implementation for the sound module in question.) If using a
computer-based system, you may be able to easily make the required settings using the
software.