Xerox Phaser 6280, Service Manual, Page: 221 / 672

Phaser 6280 Color Laser Printer Service Manual 3-85
Error Messages and Codes
4 1. Check the Tray 1 (MPT) Actuator.
2. Does the Actuator operate
smoothly?
Go to step 5. Replace the
Tray 1 (MPT)
No Paper
Actuator
(page 8-28).
5 1. Perform the Tray 1 (MPT) No Paper
test (page 4-37): Service Mode >
Engine Diag > Sensor Test > MPT
No Paper .
2. Does the number on the Control
Panel increase by 1 when the
Actuator is activated?
Replace the
MCU Board
(page 8-86). Go to step 6.
6 1. Check the wiring harness
connectors P/J28, P/J282, and P/
J2821 between the Tray 1 No Paper
Sensor and the MCU Board.
Go to step 7. Reconnect the
connectors.
Go to step 7.
7 Check the Right Side Harness for
continuity.
1. Disconnect P/J28 from the MCU
Board and P/J282 from the MPT
NPP Harness.
2. Check continuity between P/J28 <=>
P/J282.
Go to step 8. Replace the
Right Side
Harness.
8 Check the Tray 1 (MPT) NPP Harness
for continuity.
1. Disconnect P/J282 from the Right
Side Harness and P/J2821 from the
No Paper Sensor.
2. Check continuity between P/J282
<=> P/J2821.
Go to step 9. Replace the
MPT NPP
Harness.
9 Check the Tray 1 No Paper signal.
1. Disconnect P/J28 from the MCU
Board.
2. Is there +3.3 V across ground <=>
J28-B11 pin?
Go to step 10. Replace the
MCU Board
(page 8-86).
10 Check the Tray 1 No Paper Sensor for
operation.
1. Measure the voltage across ground
<=> J28-B13 pin.
2. Does the voltage change when the
Tray 1 No Paper Sensor of the Tray 1
No Paper Sensor is activated?
Replace the
MCU Board
(page 8-86). Replace the
Tray 1 No Paper
Sensor
(page 8-35).
Troubleshooting Procedure Table (continued)
Step Actions and Questions Yes No