3-82 Phaser 6180 Color Laser Printer Service Manual
Error Messages and Codes
5 Check the wiring harness connectors
P/J428, P/J2720, P/J272, and P/J27
between the MCU Board and Duplex
Board? Are the connectors securely
connected?
Go to step 6. Reconnect the
connectors.
6 Check the Duplex Unit Harness for
continuity.
1. Disconnect P/J428 and P/J2720.
2. Check continuity between P/J2720
<=> P/J428.
Go to step 7. Replace the
Duplex Unit
Harness.
7 Check the Front Cover Harness for
continuity.
1. Disconnect P/J2720 and P/J272.
2. Check continuity between P/J2720
<=> P/J272.
Go to step 8. Replace the
Front Cover
Harness.
8 Check the Right Side Harness for
continuity.
1. Disconnect P/J27 and P/J272.
2. Check continuity between P/J27 and
P/J272.
Go to step 9. Replace the
Right Side
Harness.
9 Check the Duplex Board signal.
1. Disconnect P/J27 from the MCU
Board.
2. Are there +24 V across ground <=>
J27-A17/J27-A18 when the
Interlock is activated?
Replace the
Duplex Unit
(page 8-94).
Replace the
MCU Board
(page 8-87).
10 Check the Top LV Harness for
continuity.
1. Disconnect P/J501 and P/J14.
2. Check continuity between P/J501
<=> P/J14.
Go to step 11. Replace the Top
LV Harness.
11 Check the LVPS signal.
1. Disconnect P/J503 from the LVPS.
2. Is there +24 V across ground <=>
J503-1 when the Interlock Switch is
activated?
Replace the
MCU Board
(page 8-87).
Replace the
LVPS
(page 8-81).
Troubleshooting Procedure Table (continued)
Step Actions and Questions Yes No
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