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 "IEEE 1284 board" to the controller board, connect the provided conversion connector.
  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.