Xerox Phaser 7760 Service Manual page 199

009-684 ADC Shutter Fail
The control logic detected an ADC Shutter operation failure.
Procedure
Enter Service Diagnostics Menu: Printer Menu > Troubleshooting > Service Tools > Printer
Status Page > hold the Up and Down buttons simultaneously > Run Service Diagnostics >
OK. Perform the ADC Solenoid tests. The ADC Shutter Solenoid energized.
Y N
There is +24 VDC from J404B-2 on the MCU PWB to GND.
Y N
Check the wires and connectors
(PL 9.1). If the problem continues, replace the ADC Sensor
There is 0 VDC from J404B-3 on the MCU PWB to GND.
A
Revised
Phaser 7760 Color Laser Printer
(Figure 1). If the check is OK, replace the I/F PWB
(PL 1.3).
Figure 1 009-684 ADC Sensor
A
Y N
Check the wires and connectors. If the check is OK, replace the I/F PWB
the problem continues, replace the MCU PWB
replace the ADC Sensor
The voltage from J404B-1 on the MCU PWB to GND changed to 0VDC momentarily.
Y N
Check the wires and connectors
(PL 9.1). If the problem continues, replace the Engine Control Board (MCU PWB)
(PL 13.1). If the problem continues, replace the ADC Sensor
Check the wires and connectors
(PL 1.3).
After checking that no failures are detected during normal operation, go to call closeout.
January 2010
2-163
(PL 13.1). If the problem continues,
(PL 1.3).
(Figure 1). If the check is OK, replace the I/F PWB
(PL 1.3).
(Figure 1). If the check is OK, replace the ADC Sensor
Status Indicator RAP's
(PL 9.1). If
009-684