Xerox PHASER 7500, Service Manual

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3-276 Phaser 7500 Printer Service Manual
Error Messages and Codes
ADC Patch Fail (C)
The ADC patch of C color is abnormally light.
Applicable Chain-Link Code
• 092-672 : ADC Patch Fail [C]
Initial Actions
• Power cycle the printer.
• If the problem persists, follow the procedure below.
Troubleshooting Reference
Applicable Parts Wiring and Plug/Jack Map References
■
LPH Unit (C), PL2.1.2
■
HVPS (1st/2nd/DTS), PL6.2.9
■
Imaging Unit (C), PL8.1.4
■
HVPS (Deve/BCR), PL18.1.7
■
MCU PWB, PL18.3.6
Troubleshooting Procedure
Step Actions and Questions Yes No
1 Check the Fault History.
Perform the
ATC Sensor test in
Diagnostics.
Has error 092-651 or 092-314
occurred?
Go to the
appropriate
troubleshooting
procedure. Go to step 2.
2 Check the following:
■
The Imaging Unit (C) for
contamination
■
The LPH (C) for contamination
■
The 1st BTR (C) for
contamination
■
The IBT Belt for contamination
■
The connection and board
springs between the HVPS
(Deve/BCR) and the Magnet Roll
(C) for open circuit, short circuit,
and poor contact
■
The connection and board
springs between the HVPS (1st/
2nd/DTS) and the 1st BTR (C) for
open circuit, short circuit, and
poor contact
Are they conducting properly?
Replace the
following parts
in sequence:
■
Imaging Unit
(C) (REP 1.2,
page 8-10 )
■
LPH Unit (C)
(REP 2.1,
page 8-18 )
■
HVPS (Deve/
BCR) (REP
18.4,
page 8-191 )
■
HVPS (1st/
2nd/DTS) (REP
6.4,
page 8-65 )
■
MCU PWB
(REP 18.12,
page 8-202
).
Repair the
sections that
have short
circuits and
poor contacts.