Xerox Phaser 7500 Service Manual page 294

Error Messages and Codes
3-156
Troubleshooting Procedure (Continued)
Step Actions and Questions
2 Check the following:
The Flat Cable between the MCU
■
PWB J555 and the LPH Rear PWB
(C) J559 for open circuit, short
circuit, and poor contact.
The Flat Cable between the LPH H
■
PWB (C) J567 and the LPH (C)
J575 for open circuit, short circuit,
and poor contact (connection
within the LPH Unit).
The connector (P/J579) between
■
the LPH Rear PWB (C) and the LPH
H PWB (C) for damage and debris.
The LPH Unit (C) for improper
■
installation.
Perform the LED EEPROM test in
■
Diagnostics.
Are they normal, without any short
circuits, poor contacts, and etc.?
Yes No
Replace the Repair the
following parts sections that
in sequence: have short
circuits and
LPH Unit (C)
■
(REP 2.1, poor contacts.
page 8-18)
LPH Cable
■
Assembly
LPH Rear
■
PWB (REP
2.4,
page 8-22)
MCU PWB
■
(REP 18.12,
page 8-202)
Phaser 7500 Printer Service Manual