Xerox Phaser 7760 Service Manual page 41

001-300 Left Cover (Door A) Open
Left Cover (Door A) is open.
Procedure
Enter Service Diagnostics Menu: Printer Menu > Troubleshooting > Service Tools > Printer
Status Page > hold the Up and Down buttons simultaneously > Run Service Diagnostics >
OK.. Open and close Left Cover (PL 2.7). The display changes.
Y N
Measure the voltage between +24 LVPS J172B
sured.
Y N
Check for +5 VDC between the gray and violet wires at P511 on the printer +5 VDC
LVPS (PL 9.1). +5 VDC is measured.
Y N
Go to Section 6, +5 VDC Low-Voltage Power Supplies
Replace the LVPS (PL 9.1).
Remove the Rear Cover (REP 14.2). Disconnect J172B
lock Switch (PL 2.10)). Check resistance between A1 and B1 when switch is actuated.
Resistance is less than 3 ohms.
Y N
Replace the Left Cover Interlock Switch
Reinstall the Switch. Close the Left Cover
1) on the I/F PWB. +24 VDC measured.
Y N
Repair the open circuit between the +24 VDC LVPS and the I/F PWB.
Replace the Interface PWB (PL 9.1).
If the problem continues, replace the Engine Control Board (MCU PWB)
Check installation of the Cover/Actuator.
Figure 1 001-300 Left Cover Interlock Switch
Revised
Phaser 7760 Color Laser Printer
(Figure 1) and GND(-). +24 VDC mea-
RAP.
(Figure 1) (from Left Cover Inter-
(PL 2.10).
(PL 2.7). Measure the voltage at J531-5
(PL 13.1).
(Figure
Figure 2 001-300 Left Cover Interlock Actuator
Figure 3 001-300 Left Cover Interlock Switch Location
January 2010
2-5
Status Indicator RAP's
001-300 Left Cover (Door A) Open