Controller self-diagnosis outline
Controller self-diagnosis includes 3 types, i.e., "ordinary self-diagnosis", "detailed self-diagnosis", and
"SC detection". "Ordinary self-diagnosis" is diagnosis performed for every power ON, and "detailed
self-diagnosis" is diagnosis treated as part of the service tools. "SC detection" detects mechanical faults
when power is switched on or when the machine is operating.
Detailed self-diagnosis – Method
1. After attaching the option "extension 1284 board" to the controller board, connect the
conversion connector provided.
2. Set a loop back connector in the reference Centronics I/F.
3. Press the main power supply switch while simultaneously pressing the "#" and "./* key. The
display changes to the following screen, and self-diagnosis starts.
4. After the end of detailed self-diagnosis, a "Self-diagnosis results report" is automatically
printed.
• If a Centronics loopback connector is not fitted, a Centronics diagnosis error (SC 835) is
generated.
• Loop-back connector: G0219350
Self-Diagnostic Mode
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