Ricoh SP 8400DN Field Service Manual page 1300

Ricoh a3 size black and white laser printer.

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6.Troubleshooting

Engine start up error when the machine boots up

Controller start up error

After the machine was powered on, communication between the controller and the operation

panel was not established, or communication with controller was interrupted after a normal

Error Name/Error Condition/Major Cause/Solution

Check the EEPROM.

Replace the EEPROM.

Replace the BCU.

Error Name/Error Condition/Major Cause/Solution

/ENGRDY signal was not asserted when the machine was turned on.

PCI I/F is not linked up when the machine returns from energy saver mode.

/IPURDY signal was not asserted when the machine was turned on or returned from

energy saver mode.

EC/PC/SC response was not received within specified time from power on.

Writing to Rapi driver failed (the other party not found through PCI).

Connection defect between controller board and BCU.

BCU is down / unstable

BCU defective

PSU defective

Controller board defective

When SC670 Is

Error Name/Error Condition/Major Cause/Solution

Engine start up error when the machine is in operation

CPU reset by software

CPU reset by anomaly CPU

CPU reset by hardware defect / noise

Hardware defect

Engine board reset unexpectedly.

When SC670 Is

Error Name/Error Condition/Major Cause/Solution

Controller stalled

Board installed incorrectly

Controller board defective

Operation panel connector loose, broken, or defective

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