Roland DDR-30 - TROUBLESHOOTING AND SPECIFICATIONS; Error Message Explanations

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This is seen if you press the Cartridge Button @
without the Memory Cartridge connected, or if
the Memory Cartridge is disconnected while in
use.
This is seen if you try to rewrite the memory on
the Cartridge with the Protect Switch on the
Memory Cartridge set to ON.
* Securely connect the Memory Cartridge, then
repeat the procedure.
cedure,
* Set the Protect Switch on the Memory Car-
tridge to the OFF position, and repeat the pro-
* MIDI
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This is seen if there is some error during MIDI
messages' communication.
* Press any of the button on the front panel to
leave the error, then carefully repeat the proce-
dure. (Refer to "MID! Implimentaiton Chart".)
This is seen if the buffer memory for transmis-
sion is overflowed.
+ Press the MID! Button Ф to leave the error,
then carefully repeat the procedure.
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