16 Clean both the photoconductor LED and seam sensor using a cotton swab or compressed air.
•Run diagnostic 009.
•Using an oscilloscope connected to TP3-20 on the PCL board, adjust the signal so that it matches figure A by moving the sensor bracket closer or farther from the photoconductor unit. Figure B illustrates a bad signal. Note that 7ms is the recommended minimum length of time the waveform should maintain 0v; you may have to settle for less. The two small signals prior to the 12v signal are from the smaller holes in the photoconductor unit; the larger signal is from the cutout for the PC sensor.
Figure A | | | | | | | Figure B | | |
| | | | | | | |
12V | | | | | | | | | | 12V | | | | | |
| | | | | | | | | | | | | | | |
| | | | | | | | | | | | | | | |
0V | | | | | | | | 0V | | | | | | | | |
| | | | | | | | | | | | | | |
| | | | | | | | | | | | | | | | | | |
7 ms
Is the signal adjusted to match that illustrated in Figure A?
No: Repeat this step until the signal has been adjusted properly.
Yes: Turn to TAG 002: Check & Problem Resolution.
Troubleshooting Analysis Guide (TAGs) | 3-57 |
