Xerox Phaser 7760 Service Manual page 184

009-411 Magenta Toner Cartridge Near Empty
The Magenta 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 Magenta cartridge.
• Check the Magenta ATC Sensor for blockage or contaminants.
• Check the drive system from the Developer Drive Motor to the Magenta Developer Hous-
ing 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 Magenta Dispenser Motors test. The Magenta Toner Dispense Motor
energizes.
Y N
Go to Figure 1. There is +24 VDC from J406-5 to GND.
Y N
Go to the +24 VDC Wirenets (Section 7, Wiring Data, +24 VDC -
bleshoot the problem.
There is +24 VDC from J406-4 to GND.
Y N
Check the wires from J406 to J228 for an open circuit. If the wires are OK, replace
the Magenta Toner Dispense Motor
The voltage from J406-4 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 J228 for an open circuit. If the wires are OK, replace the
Magenta Toner Dispense Motor (PL
Perform 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, +24 VDC -
bleshoot the problem.
There is +5 VDC from J535-7 to J535-6 on the I/F PWB.
Y N
Go to the +5 VDC Wirenets (Section 7, Wiring Data, +5.5 VDC Wirenet -
and troubleshoot the problem.
A B
Status Indicator RAP's
009-411
Figure 1) and trou-
(PL 6.1).
(PL 13.1). If the problem continues,
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
Check ADJ 9.3. The Magenta 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.
(PL 6.1)
Figure 1 009-411 Toner Dispense Motor M
Figure 3)
January 2010
2-148
009-383, ATC Sensor Failure RAP.
Figure 2 009-411 Developer Motor
Phaser 7760 Color Laser Printer
(PL 13.1).
Revised