EN Chapter 7 Troubleshooting 265
SW101 Door-open detection switch
SW501 Test print switch (engine controller board)
SW600 Tray 2 paper-size switch (paper size detection PCB)
SW601 Tray 2 paper-size switch (paper size detection PCB)
SW602 Tray 2 paper-size switch (paper size detection PCB)
SW1001 Optional 500-sheet paper feeder paper-size switch
SW1002 Optional 500-sheet paper feeder paper-size switch
SW1003 Optional 500-sheet paper feeder paper-size switch
TH1 Fuser heater detection thermistor 1
TH2 Fuser heater detection thermistor 2
TH3 Environment temperature detection thermistor
TH901 Fusing surface-temperature sensor
Table 50. Sensors, switches, and thermistors