Technics SX-PR603/M, Service Manual, Page: 19 / 125

- The operation status of each input action part can be confirmed. If
the part is operating properly, “OK” is shown.
- When a keyboard key is pressed, the corresponding pitch and
velocity are displayed (only as long as the key is depressed).
- The respective statuses for other input action parts are displayed.
(Analog parts are shown as numerical values from 0 to 255, and
switches are shown as ON or OFF.)
- If the display fails to change when the part is operated, or if the
change is abnormal, it may indicate a defective part.
8.8. MIDI IN/OUT test
Figure-27
- First, set the COMPUTER terminal switch to MIDI.
- Use a MIDI cable to directly connect the MIDI IN and MIDI OUT
terminals.
- When a keyboard key is pressed, the transmitted and received data
are compared and the MIDI terminal operation is indicated as being
OK or NG.
- If NG is shown, check both the IN and OUT terminals, as well as the
circuit.
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