Xerox Phaser 7760 Service Manual page 183

009-410 Yellow Toner Cartridge Near Empty
The Yellow Toner Cartridge is nearly empty/empty. This fault requires service only if the mes-
sage 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 cartridge (Y).
• Check the Yellow ATC Sensor for blockage or contaminants.
• Check the drive system from the Developer Drive Motor to the Developer Housing (Y) 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 Yellow Dispenser Motors test. The Yellow Toner Dispense Motor
gizes.
Y N
Go to Figure 1. There is +24 VDC from J406-3 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 J406-2 to GND.
Y N
Check the wires from J406 to J227 for an open circuit. If the wires are OK, replace
the Yellow Toner Dispense Motor
Perform Service Diagnostics. The voltage from J406-2 to GND drops to less than 1
VDC.
Y N
Replace the MCU PWB (PL 13.1). If the problem continues, replace the I/F PWB
9.1).
Check the wires from J406 to J227 for an open circuit. If the wires are OK, replace the Yel-
low Toner Dispense Motor (PL 6.1).
Run the Developer Motors test. The Developer Motor energizes
Y N
Go to Figure 2. There is +24 VDC from J535-3 to J535-4 on the I/F PWB.
Y N
Go to the +24 VDC Wirenets (Section 7, Wiring Data, +24VDC -
bleshoot the problem.
There is +5 VDC from J535-7 to J535-6 on the I/F PWB.
Y N
Refer to the +5 VDC Wirenets (Section 7, Wiring Data, +5.5 VDC Wirenet -
and troubleshoot the problem.
A B
Revised
Phaser 7760 Color Laser Printer
(PL 6.1) ener-
(PL 6.1).
(PL 1.1).
Figure 1) and trou-
A B
Check the wires between J533 and J535 on the I/F PWB and J232 at the Developer Motor
for open or short circuit failures or loose connections. If the wires are OK, replace the
Developer Motor (PL 1.1). If the problem continues, replace the MCU PWB
Perform TRC Adjustment ADJ
Y N
Go to the 009-380, 009-381, 009-382,
After checking that no failures are detected during normal operation, go to call closeout.
Figure 1 009-410 Toner Dispenser Motor Y
Figure 1)
(PL
Figure 3)
January 2010
2-147
9.3. The Yellow ATC Sensor check is OK.
009-383, ATC Sensor Failure RAP.
Figure 2 009-410 Developer Motor
Status Indicator RAP's
(PL 13.1).
009-410