●
The State virtual LED next to the sensor number and sensor name (M605x and M606x only)
illuminates green when the sensor is active.
●
The Toggle virtual LED next to the sensor number and sensor name (M605x and M606x only)
illuminates green after the sensor is activated and increments by one each time the sensor is
interrupted (activated or deactivated).
For example, opening Tray 2 increments the SW5 Tray 2 detection switch Toggle item count two
times—once when the tray is opened, and once when the tray is closed.
NOTE: The following table describes the sensor tests available with an optional 1x550-sheet paper feeder
installed.
For trays other than Tray 1 or Tray 2, the tray number associated with a sensor or switch depends on the
number and type of accessories installed.
Table 2-13 Tray/bin manual sensors
Sensor or switch name Replacement part number Descriptions
SR5 Tray 2 paper sensor WC2-5806-000CN (part not available) Switch button assembly
SR8 Tray 1 paper sensor RM2-0015-000CN Right door assembly
SR12 Cassette media out sensor RM2-0017-000CN Paper pickup assembly
SR20 Tray 3-X media out sensor
1
RM2-5154-000CN Paper pickup assembly
NOTE: Also associated with the media
presence sensor.
SW21 Tray 3 cassette sensor
1
WC2-5806-000CN (part not available) Switch button assembly
SR21 Tray 3 feed sensor
1
RM2-5145-000CN Paper feeder assembly
SW20 Right door sensor
1
RM2-5146-000CN Right door assembly
SR10 Output bin media out sensor RM2-0092-000CN (M553n)
RM2-0016-000CN (M552dn, M553dn,
M553x, M577)
Paper delivery assembly
1
Only appears if optional accessories are installed.
Tools for troubleshooting: Print/stop test
Use this diagnostic test to isolate the cause of problems such as image-formation defects and jams within the
engine. During this test, stop the paper anywhere along the printer paper path. The test can be programmed
to stop printing internal pages or an external print job when the paper reaches a certain position. The test can
also be programmed to stop from 0 to 60,000 ms. If the timer is set to a value that is greater than the job-
print time, the printer can recover in one of two ways:
●
After the print job is completed press OK button to return to the Troubleshooting menu before the timer
times out.
●
After the timer times out, touch the Stop button. Activate the door switch to restart the engine and
return it to a normal state.
NOTE: Do not try to perform a print/stop test while the printer is calibrating, because restarting the printer
might be necessary. If a jam message displays on the control panel during testing, activate the door switch.
154 Chapter 2 Solve problems ENWW
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