Xerox PHASER 7500 - Page 347

Phaser 7500 Printer Service Manual 3-209
Error Messages and Codes
4 Check the connection between the
Motor Drive PWB J513 and Tray 1
Feed/ Nudger Motor J269 for open
circuit, short circuit, and poor
contact.
Is it conducting properly?
Replace the
following parts
in sequence:
■ Motor Drive
PWB (REP
18.10,
page 8-197)
■ MCU PWB
(REP 18.12,
page 8-202)
Repair the
sections that
have short
circuits and poor
contacts.
5 Perform the Tray 1 (MPT) Sensors
test in Diagnostics.
Move the Shielding Board to block/
clear the light path to the Tray 1
Nudger Position Sensor.
Does the display of change
between High/ Low?
Go to step 6. Go to “General
Sensor Failure”
on page 3-28 to
check the Tray 1
Nudger Position
Sensor.
6 Check the Tray 1 Nudger Roll Up/
Down mechanism for mechanical
loading, the springs for
deformation or snags.
Are they normal, without loading,
deformation, or snags?
Replace the
following parts
in sequence:
■ Motor Drive
PWB (REP
18.10,
page 8-197)
■ MCU PWB
(REP 18.12,
page 8-202)
Repair the
sections that
have loading,
deformation, or
snags.
Troubleshooting Procedure (Continued)
Step Actions and Questions Yes No