3-176 Phaser 7500 Printer Service Manual
Error Messages and Codes
3 Check the following:
â– The Flat Cable between the MCU
PWB J556 and the LPH Rear PWB
(M) J560 for open circuit, short
circuit, and poor contact.
â– 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).
â– The connector (P/J580) between
the LPH Rear PWB (M) and the
LPH H PWB (M) for damage and
debris.
â– The LPH Unit (M) for improper
installation.
â– The Drum/ Deve Drive Motor (Y,
M, C) for improper installation
(affected by the noises caused by
improper installation).
Are they normal, without any short
circuit, poor contact, and debris?
Replace the
following parts
in sequence:
â– LPH Unit (M)
(REP 2.1,
page 8-18)
â– LPH Cable
Assembly
â– LPH Rear
PWB (REP
2.4,
page 8-22)
â– MCU PWB
(REP 18.12,
page 8-202)
Repair the
sections that
have short
circuits and
poor contacts
or, remove the
debris.
Troubleshooting Procedure (Continued)
Step Actions and Questions Yes No