Xerox Phaser 6280 Service Manual page 173

Phaser 6280 Color Laser Printer Service Manual
Troubleshooting Procedure Table (continued)
Step Actions and Questions
11 Check the Duplex Unit Harness for
continuity.
1. Disconnect P/J428 from the Duplex
Board and P/J2720 from the Front
Cover Harness.
2. Check continuity between P/J428
<=> P/J2720.
12 Check the Front Cover Harness for
continuity.
1. Disconnect P/J2720 from the Front
Cover Harness and P/J272 from the
Right Side Harness.
2. Check continuity between P/J2720
<=> P/J272.
Check the Right Side Harness for
13
continuity.
1. Disconnect P/J272 from the Front
Cover Harness and P/J27 from the
MCU Board.
2. Check continuity between P/J27 <=>
P/J272.
14 Check the Duplex Board signal.
1. Disconnect P/J27 from the MCU
Board.
2. Is there +3.3 V across ground <=>
J27-15 pin on the MCU Board?
Check the Duplex Jam Sensor signal.
15
1. Disconnect P/J430 from the Duplex
Unit Board.
2. Does the voltage change when the
actuator of the Duplex Jam Sensor
is activated?
1. Check the wiring harness connector
16
P/J 431 between the Duplex Unit
Board and the Duplex Clutch.
2. Is P/J431 connector securely
connected?
Check the Duplex Clutch for continuity.
17
1. Disconnect P/J431 from the Duplex
Clutch.
2. Is there +24 V across ground <=>
J431-1 pin on the Duplex Board?
1. Check the wiring harness connector
18
P/J 429 between the Duplex Unit
Board and the Duplex Motor.
2. Is P/J429 connector securely
connected?
Error Messages and Codes
Yes No
Go to step 12. Replace the
Duplex Unit
(page 8-99).
Go to step 13. Replace the
Front Cover
Harness.
Go to step 14. Replace the
Right Side
Harness.
Replace the Replace the
Duplex Unit MCU Board
(page 8-99). (page 8-86).
Perform steps Replace the
10 through 14. Duplex Unit
(page 8-99).
Go to step 18. Reconnect P/
J431 connector.
Replace the Perform steps
Duplex Unit 10 through 14.
(page 8-99).
Go to step 20. Reconnect P/
J429 connector.
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