Xerox Phaser 7500 Service Manual page 254

Error Messages and Codes
3-116
Troubleshooting Procedure (Continued)
Step Actions and Questions
4 Check the connections between
the Motor Drive PWB J505 and the
Main Drive Motor J244, as well as
between the Motor Drive PWB
J504 and the Main Drive Motor
J245 for open circuits, short
circuits, and poor contacts.
5 Remove the cheat.
Install the IBT Unit and close the
Left Hand Cover.
Perform the Main Motor test in
Diagnostics.
Does the Main Drive Motor rotate?
6 Perform the Main Motor test in
Diagnostics.
Perform the Takeaway Clutch test
in Diagnostics.
Does the Main Drive Motor rotate?
7 Perform the Main Motor test in
Diagnostics.
Perform the Registration Clutch
test in Diagnostics.
Does the Main Drive Motor rotate?
8 Check the connection between the
Main Drive Motor J245-8 and the
Motor Drive PWB J504-9 for open
circuit, short circuit, and poor
contact.
Yes No
Replace the Repair the
following parts sections that
in sequence: have short
circuits and
Main Drive
■
Motor poor contacts.
Assembly
(REP 3.5,
page 8-30)
Motor Drive
■
PWB (REP
18.13,
page 8-204)
MCU PWB
■
(REP 18.12,
page 8-202)
Go to step 6. Check the 2nd
BTR for loading
and the Drive
Gear for rotation
failure and
damage.
Go to step 7. Check the Tray 1
Takeaway Roll
for loading and
the Drive Gear
for rotation
failure and
damage.
Go to step 8. Check the Regi
Roll for loading
and the Drive
Gear for rotation
failure and
damage.
Replace the Repair the
following parts sections that
in sequence: have short
circuits and poor
Motor Drive
■
PWB (REP contacts.
18.13,
page 8-204)
MCU PWB
■
(REP 18.12,
page 8-202)
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