Xerox Phaser 7760 Service Manual page 205

009-925 Waste Toner Cartridge Installation
The Waste Toner Cartridge was not installed correctly.
Initial Actions
Ensure that the Waste Toner Cartridge is installed correctly.
Procedure
There is +5 VDC from J408-5 on the Engine Control Board (MCU PWB) to GND.
Y N
There is +5 VDC from FS135 on the Waste Toner Cartridge Interlock Switch to GND.
Y N
Check the wire from J511B on the +5 VDC LVPS to FS135 on the Waste Toner Car-
tridge Interlock Switch (Figure
There is +5 VDC from FS135 on the Waste Toner Cartridge Interlock Switch to GND.
Y N
Replace the Waste Toner Cartridge Interlock Switch
Check the wire between J511B on the +5 VDC LVPS and FS134 on the Waste Toner Car-
tridge Interlock Switch and the MCU PWB J408-5 for an open circuit or poor contact
ure 1).
Check the connector J408-5 between the MCU PWB and GND. If no problems are found,
replace the Engine Control Board (MCU PWB)
Figure 1 009-925 Waste Toner Cartridge Installation
Revised
Phaser 7760 Color Laser Printer
1).
(PL 4.1).
(PL 13.1).
009-926 Black Imaging Unit End of Life
The Black Imaging Unit must be replaced.
Procedure
Replace the Black Imaging Unit
Y N
Replace the Engine Control Board (MCU PWB)
Return to Service Call Procedures.
(Fig-
January 2010
2-169
(PL 4.1). The problem is corrected.
(PL 13.1).
Status Indicator RAP's
009-925, 009-926