Xerox PHASER 7500 - ADC Patch Fail (M)

Phaser 7500 Printer Service Manual 3-275
Error Messages and Codes
ADC Patch Fail (M)
The ADC patch of M color is abnormally light.
Applicable Chain-Link Code
• 092-671: ADC Patch Fail [M]
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 (M), PL2.1.2
■ HVPS (1st/2nd/DTS), PL6.2.9
■ Imaging Unit (M), 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 092-313
occurred?
Go to the
appropriate
troubleshooting
procedure.
Go to step 2.
2 Check the following:
■ The Imaging Unit (M) for
contamination
■ The LPH (M) for contamination
■ The 1st BTR (M) for
contamination
■ The IBT Belt for contamination
■ The connection and board
springs between the HVPS
(Deve/BCR) and the Magnet Roll
(M) for open circuit, short circuit,
and poor contact
■ The connection and board
springs between the HVPS (1st/
2nd/DTS) and the 1st BTR (M) for
open circuit, short circuit, and
poor contact
Are they conducting properly?
Replace the
following parts
in sequence:
■ Imaging Unit
(M) (REP 1.2,
page 8-10)
■ LPH Unit (M)
(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.