Lexmark X95 series, Service Manual

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Diagnostic aids
3-89
7558- xxx
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Finisher
• Sensor (finisher media entrance)
– A photo-reflective sensor detects whether media is fed from the bridge unit assembly to the finisher.
– It turns high (+5 V dc) while media is present within the sensing area.
– When the level turns high due to the first media of the second set during multi-set printing, this sensor
activates the buffer diverter solenoid to switch the buffer diverter gate so that the media goes in the
buffer roll assembly’s circumferential direction.
• Sensor (diverter gate)
– A photo-reflective sensor that detects the leading edge of the media.
– It turns low (0 V) when the front end reaches the sensing area.
• Sensor (lower media exit)
– A photo-interrupter sensor that detects whether media passes through the sensor (lower media exit).
– It turns high (+5 V) (light receiving) when the actuator is driven out of the sensing area by the media.
– When the level turns high, this sensor activates the front tamper motor and the rear tamper motor on the
compiler unit assembly.
–
This sensor is also used to control on/off of the media eject motor assembly.
• Sensor (compiler media present)
–
A photo-interrupter sensor that detects whether media is present or not on the compiler unit assembly.
–
While media is present, the actuator is outside the sensing area, and the sensor turns high (+5 V dc)
(light receiving).
• Sensor (buffer path)
– A photo-interrupter sensor that detects whether media is fed toward the buffer roll assembly.
– While media is present, the actuator is outside the sensing area, and the sensor turns at high (+5 V dc)
(light receiving).
• Sensor (upper media exit)
–
A photo-interrupter sensor that detects whether media is fed to the upper media exit roll assembly top at
the exit side of the upper media bin.
– When the media is fed, the actuator leaves from the sensing area, and the sensor turns high (+5 V dc).
• Sensor (upper media bin full)
A photo-reflective sensor that detects the stack volume of media in the upper media bin.
Sensor (upper media exit)
Sensor (upper media bin full)
Sensor (lower media exit)
Sensor (compiler media in)
Sensor (buffer path)
From bridge unit
Sensor (diverter gate)
Sensor (finisher
media entrance)