Xerox Phaser 7760 Service Manual page 85

004-363 K Imaging Unit Motor Fail
Imaging Unit Motor K failure.
Troubleshooting References
Table 1 References
Applicable Parts Parts List Wiring and Plug/Jack References
Imaging Unit Drive Motor PL 1.1
I/F PWB PL 9.1
Engine Control Board PL 13.1
(MCU PWB)
Troubleshooting Procedure
Table 2 Procedure
Step Actions and Questions
1 1. Enter Service Diagnostics Menu:
Printer Menu > Troubleshooting >
Service Tools > Printer Status Page
> hold the Up and Down buttons
simultaneously > Run Service Diag-
nostics > OK. Run the Black Imag-
ing Motor test.
2. Does the Motor operate correctly?
2 Is the voltage at J535-6 +5 VDC?
3 Is the voltage at J535-10 +24 VDC?
4 Perform the Black Imaging Unit Motor test.
Is the voltage at J535-5 0 VDC with the test
running?
5 Is the frequency between J535-8 and
ground between 1 KHz and 1.3 KHz?
Revised
Phaser 7760 Color Laser Printer
Section 7, I/F PWB, Main Motor, LVPS T11 Plug/Jack
Locations - Figure 16
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
Go to step 7. Go to step 2.
Go to step 3. Refer to Section 7,
BSD 8.2 Paper
Transportation) to
troubleshoot the
missing + 5 VDC -
Figure 2.
Go to step 4. Refer to Section 7,
BSD 8.2 Paper
Transportation) to
troubleshoot the
missing + 5 VDC -
Figure 2.
Go to step 5. Refer to Section 7,
BSD 8.2 Paper
Transportation) to
troubleshoot -
ure 2.
Replace the Black Go to step 6.
Imaging Unit Drive
Motor (REP 4.4).
Step Actions and Questions
6 Is the frequency between J535-2 and
ground between 1KHz and 1.3 KHz?
7 Is +3.3 VDC present at J535-7 with the
Motor test running from Service Diagnos-
tics?
Fig-
Figure 1 004-363 Imaging Unit Motor K
January 2010
2-49
Table 2 Procedure
Yes No
Check for an open Replace in order
circuit between until resolved:
J534A-8 and J535- 1.
8.
2.
Is there is no Refer to Section 7, -
mechanical blind in BSD 8.2 Paper
the Black Imaging Transportation) to
Unit, replace the troubleshoot the
Black Drum Drive missing +3.3 VDC -
Motor (REP 4.4). Figure
Status Indicator RAP's
Engine Inter-
face Board
(REP 1.8)
Engine Con-
trol Board
(MCU PWB)
(REP 1.2)
2.
004-363