Oki ES3640MFP Service & Troubleshooting Manual page 116

Fiery Controller to Engine Board Communication Failure
Error Codes that Apply
072
Initial Troubleshooting Actions to Take
1. Cycle the printer's power.
2. If the problem persists follow the procedure below.
Parts of the Printer that Apply
1. Fiery Control PCB
2. Engine Control Board
Troubleshooting Procedure
Steps
1
2
Reseat the Fiery Control Board to the
3
Action Taken
Cycle power to the printer.
Does the error persist?
Engine Board.
Does the error persist?
Does the error persist?
Yes
Go to Step 2.
Replace the Engine
Control Board
Replace the Fiery
Control Board
No
Complete
Go to Step 3.
Complete