Xerox Phaser 6280 Service Manual page 251

Phaser 6280 Color Laser Printer Service Manual
Troubleshooting Procedure Table (continued)
Step Actions and Questions
5 1. Check the wiring harness
connectors P/J428, P/J2720, P/
J272, and P/J27 between the MCU
Board and Duplex Board.
2. Are the connectors securely
connected?
Check the Duplex Unit Harness for
6
continuity.
1. Disconnect P/J428 from the Duplex
Board and P/J2720 Front Cover
Assembly Harness.
2. Check continuity between P/J2720
<=> P/J428.
7 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
8
continuity.
1. Disconnect P/J27 from the MCU
Board and P/J272 from the Front
Cover Harness.
2. Check continuity between P/J27 and
P/J272.
9 Check the Duplex Board signal.
1. Disconnect P/J27 from the MCU
Board.
2. Are there +24 V across ground <=>
J27-17/J27-18 pin when the
Interlock is activated?
1. Check the detailed error code (press
10
the Up and Down buttons
simultaneously).
2. Does code "01" display on the
Control Panel?
11 1. Check wiring harness connectors
between the Main Fan and the LVPS.
2. Is P/J502 securely connected?
Does the error still occur?
12
13 1. Perform the Fan test (page 4-46):
Service Mode
Motor Test > Fan.
2. Does the Fan operate properly?
Yes
Go to step 6.
Go to step 7.
Go to step 8.
Go to step 9.
Replace the
Duplex Unit
(page 8-99).
Go to step 11.
Go to step 12.
Go to step 13.
Replace the
> Engine Diag > MCU Board
(page 8-86).
Error Messages and Codes
No
Reconnect the
connectors.
Replace the
Duplex Unit
(page 8-99).
Replace the
Front Cover
Harness.
Replace the
Right Side
Harness.
Replace the
MCU Board
(page 8-86).
Go to step 1.
Complete.
Complete.
Go to step 14.
3-115