PC88 Internal Diagnostics
test will fail. If this test passes, however, even when there is nothing connected to the MIDI In
connector, there is a problem with the unit.
The VGM Port Test requires a VGM option to be installed. If no VGM option is installed, the test
will fail. If, on the other hand, there is a VGM option installed, the PC88 will use it to play Þve
test tones in sequence. You must press a button or keyboard key after each tone sounds in
order to advance to the next. These tones are likely to be very loud and potentially destructive,
so be sure to set the PC88Õs volume slider to its minimum setting before running the diagnostic
tests. You can adjust the volume slider after each tone begins to sound.
The Sound Test produces Þve test tones in sequence. You must press a button or keyboard key
after each one sounds in order to advance to the next. These tones are likely to be very loud, so
be sure to set the PC88Õs volume slider to its minimum setting before running the diagnostic
tests. You can adjust the volume slider after each tone begins to sound.
Exiting Diagnostics
To leave Diagnostics mode, restart the PC88, without holding down any of its keys or buttons.
G-2