Xerox Phaser 7760 Service Manual page 186

009-413 Black Toner Cartridge Near Empty
The Black Toner Cartridge is nearly empty. This fault requires service only if the message
appears before the Toner Cartridge is depleted.
NOTE: Continuous running of high density prints can temporarily deplete the toner supply.
Initial Actions
• Ensure that there is toner and the toner is evenly distributed in the Black cartridge.
• Check the Black ATC Sensor for blockage or contaminants.
• Check the drive system from the Main Drive Motor to the Black Developer Housing for
damage.
Procedure
Enter Service Diagnostics Menu: Printer Menu > Troubleshooting > Service Tools > Printer
Status Page > hold the Up and Down buttons simultaneously > Run Service Diagnostics >
OK. Run the Black Dispenser Motors test. The Black Toner Dispense Motor energizes
6.1).
Y N
There is +24 VDC from J406-9 to GND
Y N
Go to the +24 VDC Wirenets (Section 7, Wiring Data, +24 VDC Wirenets -
and troubleshoot the problem.
There is +24 VDC from J406-8 to GND.
Y N
Check the wires from J406 to J230 for an open circuit. If the wires are OK, replace
the Cyan Toner Dispense Motor
The voltage from J406-8 to GND drops to less than 1 VDC.
Y N
Replace the Engine Control Board (MCU PWB)
replace the I/F PWB (PL 9.1).
Check the wires from J406 to J230 for an open circuit. If the wires are OK, replace the
Cyan Toner Dispense Motor (PL 6.1).
Perform the Developer Motors test. The Black Developer Assembly energizes
Y N
Check the mechanical drive to the Clutch, refer to BSD 4.1.
Check the circuit of the Developer Clutch (K)
Check ADJ 9.3. The Black ATC Sensor check is OK.
Y N
Go to RAP 009-380, 009-381, 009-382,
After checking that no failures are detected during normal operation, go to call closeout.
Status Indicator RAP's
009-413
(Figure 1).
(PL 6.1).
(PL 13.1). If the problem continues,
(PL
(Figure 2) (PL 1.2).
009-383, ATC Sensor Failure.
Figure 1 009-413 Toner Dispense Motor K
(PL
Figure 1)
1.1).
January 2010
2-150
Figure 2 009-413 Dev Clutch K
Phaser 7760 Color Laser Printer
Revised