Xerox WorkCentre 4150 Service Manual page 71

03-940, 950, 960 Machine to Tray 2, 3 or 4 Communications
Fault RAP
03-940 A main PWB to tray 2 PWB communications error has been detected.
03-950 A main PWB to tray 3 PWB communications error has been detected.
03-960 A main PWB to tray 4 PWB communications error has been detected.
Procedure
WARNING
Switch off the electricity to the machine. Disconnect the power cord from the customer
supply while performing tasks that do not need electricity. Electricity can cause death or
injury. Moving parts can cause injury.
NOTE: The main PWB has 4 test points, GND, +3.3V, +5V and +24V. The location of the test
points is shown on the Main PWB PJ location illustration.
NOTE: Trays 2, 3 and 4 are identical. Check the relevant tray module.
Refer to Wiring Diagram 7 and Wiring Diagram 12. Perform the following:
1. Switch off the machine, then switch on the machine.
2. Check the wiring between CN24 on the Main PWB and the tray PWB, PL 7.20 Item 6.
3. Install new components as necessary:
• Tray connector, PL 7.15 Item 32 or PL 7.20 Item 17.
• Tray PWB, PL 7.20 Item 6.
• Main PWB, PL 1.10 Item 1.
WorkCentre 4150
03-970 MCB Watchdog Detects Software RAP
03-970 The main PWB software has stopped responding.
Procedure
Switch off the electricity to the machine. Disconnect the power cord from the customer
supply while performing tasks that do not need electricity. Electricity can cause death or
injury. Moving parts can cause injury.
Perform the following:
1. Switch off the machine, then switch on the machine.
2. Reload the software, GP 6.
3. If necessary install a new main PWB, PL 1.10 Item 1.
September 2006
2-13
WARNING
Status Indicator RAPs
03-940, 950, 960, 03-970