Phaser 6180MFP Multifunction Printer Service Manual 3-155
Error Messages and Codes
MACPHY Internal Loop Test Error
MACPHY Internal Loop Test error has occurred. The following troubleshooting 
procedure applies to this error.
Applicable Chain Link
■ Chain Link 116-393: MACPHY Int Loop Test Error (Diag Mode)
Initial Actions
■ Cycle printer power.
■ If the problem persists, follow the procedure below.
Troubleshooting Reference Table
Applicable Parts Wiring and Plug/Jack Map References
■ Image Processor Board, PL9.1.27
Troubleshooting Procedure Table
Step Actions and Questions Yes No
1 1.Reboot the printer.
2.Does the error still occur?
Go to step 2. Complete.
2 1.Reseat the Image Processor Board.
2.Does the error still occur?
Replace the 
Image 
Processor Board 
(page 8-90).
Complete.