Ricoh SP 8400DN Field Service Manual page 1243

Ricoh a3 size black and white laser printer.

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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

After attaching the option "IEEE 1284 board" to the controller board, connect the provided conversion

Set a loop back connector in the reference centronics I/F.

Press the main power supply switch while simultaneously pressing the "#" and "./* key. The display changes

6.Troubleshooting

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