Canon (6981A002AA) for imagerunner 2200, 2800, 3300 Print Server "normal pulse reading" Questions

...pulse signal between J311-A9 (FILM_ROT_D) and J311-A8 (GND); at intervals of 100 msec ON and 440 msec OFF NO: If the fixing film is normal, replace the sensor. 3. Fixing film unit, DC controller PCB ...