3-98 Phaser 6180 Color Laser Printer Service Manual
Error Messages and Codes
Door A Open
The Front Cover is open.
Applicable Chain Link
■ Chain Link 077-300: Door A Open (Front Cover Open)
Initial Actions
■ Cycle printer power.
■ If the problem persists, follow the procedure below.
Troubleshooting Reference Table
Applicable Parts Wiring and Plug/Jack Map References
■ MCU Board, PL9.1.20
■ Front Cover, PL1.2.1
■ Interlock Harness, PL9.1.3
Troubleshooting Procedure Table
Step Actions and Questions Yes No
1 Are there any damages on the Front 
Cover?
Replace the 
Front Cover 
(page 8-14).
Go to step 2.
2 Check the Interlock Switch for 
operation.
Perform the Interlock Switch test 
(page 4-30): Service Mode > Engine 
Diag > Sensor Test > Interlock 
Switch.
Does the Switch operate properly?
Replace the 
MCU Board 
(page 8-87).
Go to step 3.
3 Replace the Interlock Switch Harness 
(page 8-80). Does the error still 
occur?
Replace the 
MCU Board 
(page 8-87).
Complete.