Xerox Phaser 6128MFP - Page 376

5-30 Phaser 6128MFP Service Manual
Print-Quality Troubleshooting
5 1. Disconnect J14 from the Erase
LED Assy.
2. Measure the voltage across P14-
15 <=> ground on the MCU Board.
Does the voltage measure about
+3.3 VDC?
Replace the
Erase LED Assy
(page 8-86).
Replace the
MCU Board
(page 8-57).
6 Check the Imaging Unit high-
voltage connections.
Are the contacts on the Imaging
Unit, and springs damaged or dirty?
Clean and/or
replace the
Imaging Unit
or spring(s),
then go to step
7.
Go to step 8.
7 Reseat the Imaging Unit.
Is the image printed correctly?
Complete Go to step 8.
8 Check the Transfer Belt high-voltage
connections..
Are the contacts on the Transfer Belt
and springs damaged or dirty?
Clean or
replace the
Transfer Belt
contacts or
spring(s).
Go to step 9.
9 Reseat all MCU Board connectors.
Is the image printed correctly?
Complete Go to step 10.
10 Reseat all IP Board connectors.
Is the image printed correctly?
Complete Go to step 11.
11 Open and close the Front Cover to
reseat the Transfer Belt.
Is the image printed correctly?
Complete Go to step 12.
12 Replace the Imaging Unit
(page 8-8).
Is the image printed correctly?
Complete Go to step 13.
13 Replace the Fuser (page 8-11).
Is the image printed correctly?
Complete Go to step 14.
14 Replace the MCU Board (page 8-57).
Is the image printed correctly?
Complete Replace the IP
Board
(page 8-41).
Troubleshooting Procedure Table (continued)
Step Actions and Questions Yes No