Oki ES3640MFP Service & Troubleshooting Manual page 129

Top Cover Open Error
Error Codes that Apply
310
Initial Troubleshooting Actions to Take
1. Ensure that the Top Cover Latch is free of obstructions and fully closed.
2. Cycle the printer's power.
3. If the problem persists follow the procedure below.
Parts of the Printer that Apply
1. Top Cover Interlock Switch
2. HVPS
3. Engine Control Board
Troubleshooting Procedure
Steps
Check the following for evidence of
1
fault or damage:
Top Cover latch (right side)
Top Cover Interlock Actuator
Is there any damage or
misalignment?
Test the Top Cover Interlock Switch.
2
Run the Scan Switch test
the Switch.
Does the switch function correctly?
Replace the Top Cover Interlock
3
Switch.
Does the error persist?
Check the switch voltage on the
4
HVPS. Is there +5 V across the
connector?
Check all pins on the HVOLT Harness
5
for continuity.
1. Disconnect the ribbon cable.
2. Check continuity of the ribbon
cable.
Action Taken
to test
Yes
Replace any damaged
parts.
Replace the Engine
Control Board
Go to step 4.
Go to Step 5.
Replace the Engine
Control Board
No
Go to Step 2.
Go to Step 3.
Complete
Replace the HVPS
Replace the Ribbon
cable.
Replace the HVPS