Xerox Phaser 7760 Service Manual page 65

004-322 Main Motor Fail
Main Motor failure.
Troubleshooting References
Table 1 References
Applicable Parts Parts List Wiring and Plug/Jack References
Main Drive Motor Assem- PL 1.2
bly
I/F PWB PL 9.1
Troubleshooting Procedure
Table 2 Procedure
Step Actions and Questions
1 Enter Service Diagnostics Menu
Control Panel Diagnostics).
Does the Main Motor run in diagnostics?
2 Does the voltage at P/J 203-8 change from
+3.3 VDC to 0 VDC when the motor is
turned on and off in Service Diagnostics?
3 Check P/J 203-1 and P/J 203-2 for +24
VDC.
Do both pins have +24 VDC?
4 Turn off the printer and check the wiring
between J203 and J 536 for an open condi-
tion or short to ground.
Is the wiring OK?
Revised
Phaser 7760 Color Laser Printer
Section 7, I/F PWB, Main Motor, LVPS T11 Plug/Jack
Locations - Figure 16
Yes No
(refer to Go to step 2. Go to step 3.
Check the wiring Replace the Main
from J 203-8 to Drive Motor Assem-
J536-3 for open or bly (REP
shorted to ground.
If the wiring is OK,
replace the Inter-
face Board (REP
1.8).
Go to step 4. Replace the Inter-
face PWB
1.8).
Replace the Inter- Repair the wiring
face PWB (REP harness.
1.8).
004-323 Black Imaging Unit Motor Fail
Black Imaging Unit Motor has failed.
Troubleshooting References
Applicable Parts
Imaging Unit Drive Motor
I/F PWB
Engine Control Board
(MCU PWB)
Troubleshooting Procedure
Step Actions and Questions
1 1. Enter Service Diagnostics
Printer Menu > Troubleshooting >
Service Tools > Printer Status Page
4.1). > hold the Up and Down buttons
simultaneously > Run Service Diag-
nostics > OK.
2. Select Motors/Fan Tests > OK.
Select Imaging Unit Motors > OK.
2 Is the voltage at J235-4 +5 VDC?
(REP
3 Is the voltage at J235-1 +5 VDC?
4 1. Run the Imaging Unit Motors test
from Service Diagnostics.
2. Is the voltage at J235-5 0 VDC with
the test running?
5 Is the frequency between J235-7 between
1KHz and 1.3 KHz?
January 2010
2-29
Table 1 References
Parts List Wiring and Plug/Jack Map 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
PL 13.1 Section 7, Engine Control Board (MCU PWB) Plug/
Jack Locations - Figure 15
Table 2 Procedure
Yes
Menu: Go to step 7.
Go to step 3.
Go to step 4.
Go to step 5.
Replace the Black
Imaging Unit Motor
(REP 4.4).
004-322, 004-323
No
Go to step 2.
Refer to Section 7,
Xerographics - Fig-
ure 2 to trouble-
shoot the missing
+5 VDC.
Refer to Section 7,
Xerographics - Fig-
ure 2 to trouble-
shoot the missing
+24 VDC.
Refer to Section 7,
Xerographics - Fig-
ure 2 to trouble-
shoot.
Go to step 6.
Status Indicator RAP's