Xerox Phaser 6280 Service Manual page 276

Error Messages and Codes
3-140
Troubleshooting Procedure Table (continued)
Step Actions and Questions
6 1. Check the toner density. Perform
Gradation Test Print (page 5-13):
Service Mode >
Gradation ESS.
2. Compare the density of four colors
toner. Is there dark color on the
print?
7 Check the Solenoid in the Transfer Unit
for operation.
1. Perform the ADC Sensor Solenoid
test (page 4-58):
Engine Diag > Motor Test
(CTD) Sensor Solenoid.
2. Perform the ADC Sensor LED test
(page 4-59): Service Mode
Engine Diag > Motor Test
(CTD) Sensor LED.
3. Does the ADC Sensor operate
properly?
1. Check the wiring harness
8
connectors P/J27, P/J272, and P/
J2721 between the MCU Board and
the Transfer Unit.
2. Are the connectors securely
connected?
Check the Front Cover Harness for
9
continuity.
1. Disconnect P/J2721 from the
Transfer Unit and P/J272 from the
Right Side Harness.
2. Check continuity between P/J2721
<=> P/J272.
Check the Right Side Harness for
10
continuity.
1. Disconnect P/J27 from the MCU
Board and P/J272 from the Front
Cover Harness.
2. Check continuity between P/J27 <=>
P/J272.
11 Check the ADC Sensor signal.
1. Disconnect P/J27 from the MCU
Board.
2. Is there +5 V across ground <=>
J27-7 pin?
1. Replace the corresponding Print
12
Cartridge (page 8-10).
2. Does the error still occur?
Yes
Go to step 7.
Test Print >
Go to step 12.
Service Mode >
> ADC
>
> ADC
Go to step 9.
Go to step 10.
Go to step 11.
Replace the
Transfer Unit
(page 8-8).
Replace the
Laser Unit
(page 8-50).
Phaser 6280 Color Laser Printer Service Manual
No
Replace the
MCU Board
(page 8-86).
Go to step 8.
Reconnect the
connectors.
Go to step 9.
Replace the
Front Cover
Harness.
Replace the
Right Side
Harness.
Replace the
MCU Board
(page 8-86).
Complete.