Service manual

Epson AcuLaser CX-11N/AcuLaser CX-11NF Field Repair Guide 9/9/05
Printer Component, Software Item, LCD Display, Printer Button Page 31.
ADF Switches
Document Width Sensors (Switches) (PPL Ref # 13-03-08 (Ltr) & 13-03-09(B5))
Detects the positions of the side edge guides on the document tray. The two Document Width Sensors detect doc-
ument size (width) by combination action as follows.
If one of these switches is defective, replace the entire ADF Assembly (PPL Ref # 13-01-23)
Sensors
Printer Sensors
1. Test switches with AC Power ON. Set your multimeter to read DC volts. The sensor should toggle between high/
low or low/high when activated/deactivated. Either type of reading is acceptable.
2. Most sensors listed below can malfunction due to an accumulation of toner and/or paper particles. Before
replacing a sensor listed below, clean the sensor with a soft cloth.
3. Sensor locations within the printer are depicted in drawings at the end of this section.
2nd BTR Retract Sensor (PPL Ref # 06-01-22)
Detects the position of the BTR. When the BTR is in the Home Position, the actuator blocks the sensor. When the
BTR is Out of Home Position, the actuator is out of the sensor.
ADC Sensor (PPL Ref # 06-01-20)
Reads the toner patch densities on the Belt immediately before secondary transfer and converts the read densities to
voltage values. These voltage values are used for controlling toner density.
Edge Guide
Position
B5 Sensor LT Sensor
Letter size
OFF ON
A4 size
OFF OFF
B5 size
ON OFF