Xerox Phaser 7500 Service Manual page 284

Error Messages and Codes
3-146
Troubleshooting Procedure (Continued)
Step Actions and Questions
2 Check the following:
The connection between the
■
Motor Drive PWB J518 and the
LPH Rear PWB (M) J552 for open
circuit, short circuit, and poor
contact.
The connection between the LPH
■
H PWB (M) J564 and the LPH (M)
J572 for open circuit, short circuit,
and poor contact (connection
within the LPH Unit).
The Flat Cable between the MCU
■
PWB J556 and the LPH Rear PWB
(M) J560 for open circuit, short
circuit, and poor contact
(especially for short circuit
between MCU PWB J556 pins-28/
27 and LPH Rear PWB (M) J560
pins-1/2).
The Flat Cable between the LPH H
■
PWB (M) J568 and the LPH (M)
J576 for open circuit, short circuit,
and poor contact (connection
within the LPH Unit).
The connector (P/J580) between
■
the LPH Rear PWB (M) and the
LPH H PWB (M) for damage and
debris.
The LPH Unit (M) for improper
■
installation.
Are they normal, without any short
circuits, poor contacts, and etc.?
3
Check the connection of the Motor
Drive PWB J518 connector.
Is the Motor Drive PWB J518
connector properly connected?
Yes No
Replace the Repair the
following parts sections that
in sequence: have short
circuits and
LPH Unit (M)
■
(REP 2.1, poor contacts.
page 8-18)
LPH Cable
■
Assembly
LPH Rear
■
PWB (REP
2.4,
page 8-22)
Motor Drive
■
PWB (REP
18.13,
page 8-204)
MCU PWB
■
(REP 18.12,
page 8-202)
Replace the
Connect the
following parts Motor Drive
in sequence: PWB J518
connector
Motor Drive
■
PWB (REP properly.
18.13,
page 8-204)
MCU PWB
■
(REP 18.12,
page 8-202)
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