Phaser 6180 Color Laser Printer Service Manual 3-11
Error Messages and Codes
5 Perform the Registration Sensor test 
(page 4-29): Service Mode > Engine 
Diag > Sensor Test > Regi Sensor.
Does the number on the Control Panel 
increase by 1 when the Actuator of the 
Registration Sensor is activated?
Go to step 11. Go to step 6.
6 Check the wiring harness connectors 
P/J23, P/J232, and P/J2322 between 
the MCU Board and the Registration 
Sensor. Are the connectors securely 
connected?
Go to step 7. Reconnect the 
connectors.
7 Check the Registration Sensor 
Harness for continuity.
1. Disconnect P/J232 and P/J2322.
2. Check continuity between P/J232 
<=> P/J2322.
Go to step 8. Replace the 
Registration 
Sensor 
Harness.
8 Check the Right Side Harness for 
continuity.
1. Disconnect P/J23 and P/J232.
2. Check continuity between P/J23 <=> 
P/J232.
Go to step 9. Replace the 
Right Side 
Harness.
9 Check the Registration Sensor signal.
1. Disconnect P/J23 on the MCU 
Board.
2. Is there +3.3 V across ground <=> 
J23-8?
Go to step 10. Replace the 
MCU Board 
(page 8-87).
10 Check the Registration Sensor for 
signal.
1. Measure the voltage across ground 
<=> J23-10 on the MCU Board.
2. Does the voltage change when the 
Actuator of the Registration Sensor 
is activated?
Replace the 
MCU Board 
(page 8-87).
Replace the 
Feeder 
(page 8-43).
11 Perform the Tray 2 Motor test 
(page 4-42): Service Mode > Engine 
Diag > Motor Test > Tray 2 Motor.
Does the Motor operate?
Go to step 15. Go to step 12.
12 Check the wiring harness connectors 
P/J25 and P/J251 between the MCU 
Board and the Tray 2 Motor. Are the 
connectors securely connected?
Go to step 13. Connect the 
connectors.
13 Check the Right Side Harness for 
continuity.
1. Disconnect P/J25 and P/J251.
2. Check continuity between P/J25 <=> 
P/J251.
Go to step 14. Replace the 
Right Side 
Harness.
Troubleshooting Procedure Table  (continued)
Step Actions and Questions Yes No