Xerox Phaser 7760 Service Manual page 83

004-358 Controller Communication Fail
Failure occurred in Printer Communication.
Troubleshooting References
Table 1 References
Applicable Parts Parts List Wiring and Plug/Jack References
Accumulator Belt PL 5.2
I/F PWB PL 9.1
Engine Control Board PL 13.1
(MCU PWB)
Troubleshooting Procedures
Table 2 Procedure
Step Actions and Questions
1 1. Cycle power to the printer to clear the
error.
2. Turn the printer power Off.
3. Remove the Image Processor Board.
4. Inspect the orange ribbon cable
between the Relay Board and Engine
Control Board.
5. Is the connector fully seated and free
from damage?
Revised
Phaser 7760 Color Laser Printer
Section 7, IBT Belt Assembly Plug/Jack Locations -
Figure 11
Section 7, I/F PWB, Main Motor, LVPS T11 Plug/Jack
Locations - Figure 16
Section 7, Engine Control Board (MCU PWB) Plug/
Jack Locations - Figure 15
Yes No
Replace in the following order:
1. Image Processor Board
2. Electrical Chassis Assembly
1.3)
3. Engine Control Board (MCU PWB)
(REP 1.2)
004-361 Imaging Unit Motor Fail
Imaging Unit Motor has failed.
Troubleshooting References
Applicable Parts
Imaging Unit Drive Motor
I/F PWB
Troubleshooting Procedure
Step Actions and Questions
1 1. Enter Service Diagnostics
Printer Menu > Troubleshooting >
(REP 1.12) Service Tools > Printer Status Page
> hold the Up and Down buttons
(REP
simultaneously > Run Service Diag-
nostics > OK. Perform the Imaging
Unit Motor test.
2. Does the Motor operate correctly?
2 Is the voltage at J535-5 +5 VDC?
3 Is the voltage at J535-10 +24 VDC?
4 1. Enter Service Diagnostics
2. While running the Imaging Unit Motor
test, check the voltage at J535-1 and
J535-2.
3. Is the voltage 0 VDC while the test is
running?
5 Is the frequency between J535-4 and
ground between 1 KHz and 1.3 KHz?
6 1. Check for a short to ground at J535-4.
2. Is the wire grounded?
7 1. Enter Service Diagnostics
2. While running the Imaging Unit Motor
test, check the voltage at J535-7.
3. Is the voltage +5 VDC while the test is
running?
January 2010
2-47
Table 1 References
Parts List Wiring and Plug/Jack References
PL 1.1 Section 7, I/F PWB, Main Motor, LVPS T11 Plug/Jack
Locations - Figure 16
PL 9.1 Section 7, I/F PWB, Main Motor, LVPS T11 Plug/Jack
Locations - Figure 16
Table 2 Procedure
Yes
Menu: Go to step 7.
Go to step 3.
Go to step 4.
Menu. Go to step 5.
Replace the Imag-
ing Unit Drive Motor
(REP 4.4).
Repair or replace
the wiring harness.
Menu. Replace the Imag-
ing Unit Drive Motor
(REP 4.4).
004-358, 004-361
No
Go to step 2.
Replace the I/F
PWB (REP 1.8).
Replace the I/F
PWB (REP 1.8).
Replace the I/F
PWB (REP 1.8).
Go to step 6.
Replace the I/F
PWB (REP 1.8).
Replace the I/F
PWB (REP 1.8).
Status Indicator RAP's