Phaser 6500/WorkCentre 6505 Service Manual Xerox Internal Use Only 3-129
Error Messages and Codes
IOT Duplexer Failure
Applicable Error Code
• 077-215
12 Disconnect J23 from the MCU Board
and measure the voltage across P23-3
<=> ground on the MCU Board.
Is the voltage about +3.3 VDC?
Go to step 13. Replace the
MCU Board.
(SFP,
page 8-138;
MFP,
page 8-160)
13 Check the voltage across P23-5 <=>
ground on the MCU Board.
Remove the Lower Chute Assembly
(page 8-84; PL3.2.27) to check the
operation of the Registration Sensor.
Does the voltage change when you
operate the Registration Input
Actuator?
Replace the
MCU Board.
(SFP,
page 8-138;
MFP,
page 8-160)
Replace the
Registration
Sensor.
14 Check after replacing Duplex Unit.
Replace Duplex Unit. (page 8-162)
Does the error still occur when
printing?
Go to step 15. Complete.
15 Check after replacing Fuser Assy.
Replace Fuser Assy.
Does the error still occur when
printing?
NOTE: After replacement, be sure to
clear life counter value.
Replace the
MCU Board.
(SFP,
page 8-138;
MFP,
page 8-160)
Complete.
Troubleshooting Reference Table
Applicable Parts Wiring and Plug/Jack Map References
■ Option Harness Assy (PL3.1.20)
■ MCU Board (SFP PL8.2.13; MFP
PL8.3.6)
■ Duplex Harness Assy (PL11.1.14)
■ Duplex Unit (PL11.1.1)
■ “Map 1 - SFP Print Engine” on
page 10-6
■ “Map 6 - MFP Print Engine” on
page 10-15
■ “Map 11 - Duplex Unit” on page 10-20
■ “SFP Duplex Unit” on page 10-36
■ “MFP Duplex Unit” on page 10-51
Troubleshooting Procedure (continued)
Step Actions and Questions Yes No
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