Xerox 6250N Service Manual - Page 190

Print Engine Test Print Print-quality and engine logic or hardware problems can be easily isolated to either the Image Processor Board or the Print Engine by running the Print Engine Only Test Print. 1. Turn printer power OFF. 2. Remove the Image Processor Board. 3. Turn printer power ON. 4. Look inside the Image Processor Board cavity, on the rear of the Engine Control Board locate jumper pins 1 and 2 on connector P31. See figure below or "Map 3" on page 10-8 for P31 location. 5. With a long screwdriver, touch the pins to short and start the test process, the pins must remain shorted to execute the test. 6. The printer will begin to print the 600 x 600 engine test print unless an error status from the Engine Control Board is present. Printing will continue until the jumper is removed from pin 1 to 2. The prints that are in process will be completed. Note Power to the front panel is disabled during this test. The front panel graphics and all LED's are off. P 31 Print-Quality Troubleshooting 6250-505 5-9