Lexmark C 950 Service Manual

Diagnostic aids 3-89
  5058-030
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• Front tamper motor
–  A stepping motor that moves the front tamper for tamping.
–  Clockwise rotation of this motor moves the front tamper to the rear side. Counterclockwise rotation of this 
motor moves the tamper to the front side.
• Rear tamper motor
–  A stepping motor that moves the rear tamper for tamping.
–  Clockwise rotation of this motor moves the rear tamper to the front side. Counterclockwise rotation of this 
motor moves the tamper to...

3-90  Service Manual 5058-030  
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• Rear staple (corner) [rear corner]
This type of stapling is applied for media with a width of 216 mm or more.
The stapler moves to the rear corner and staples a set of media obliquely (45 
degrees) after the front tamper aligns the media to the rear side.
• Rear Staple (Straight) [rear straight]
This type of stapling is applied for media with a width of less than 216 mm.
The Stapler staples a set of media in parallel with the media edge after the...

Diagnostic aids 3-91
  5058-030
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Stapling one sheet 
Upon receiving the stapling command from the printer with one sheet remaining on the compiler unit assembly, 
the finisher ejects the media to the stacker media bin without stapling it. 
Stapling multiple size media
When sheets with different sizes and the same width (example: A4L and A3S) are present on the compiler unit 
assembly, all the sheets are stapled and then ejected to the stacker media bin.
When sheets with different...

3-92  Service Manual 5058-030  
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In any mode other than the front staple mode, the stapler moves to the specified position, and then performs 
stapling.
Stapler unit assembly
The stapling operation is executed by closing the stapler unit assembly.
The stapler unit assembly, containing the staple motor, the sensor (staple home), the sensor (self priming), and 
the sensor (low staple), is activated by the staple motor.
Forward (clockwise) rotation of the motor drives the stapler to...

Diagnostic aids 3-93
  5058-030
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Functions of stapler sensors/motors
• Sensor (stapler carriage HP)
–  A photo-interrupter sensor that detects the stapler home position, rear staple (corner) position, and rear 
staple (straight) position.
–  It turns high (+5 V dc) (light blocking) when the stapler comes to the specified position.
• Stapler carriage motor assembly
–  A stepping motor that moves the stapler unit assembly.
–  Clockwise rotation of this motor moves the stapler unit...

3-94  Service Manual 5058-030  
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Documents in the compiler tray are assembled towards the front. For center stapling and folding positions, one 
set of document is assembled and moved to the center. 
The booklet end guide is lifted to where the fold will divide the paper into two equal halves. When the printouts 
are stapled, the booklet end guide will be raised so that the stapled position is at the folding position. The 
stapling position is slightly lower than the folding position...

Diagnostic aids 3-95
  5058-030
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• Booklet knife solenoid
–   This solenoid transfers the booklet folding/exit drive motor assembly to the knife through the gear.
• Sensor (booklet front tamper HP)
–  This photo sensor detects the home position of the booklet front tamper.
• Sensor (booklet rear tamper HP)
–  This photo sensor detects the home position of the booklet Rear tamper.
• Sensor (booklet compile media in)
–  This photo sensor detects paper present in the booklet compiler...

3-96  Service Manual 5058-030  
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• Sensor (booklet drawer interlock)
–  This photo sensor detects when the booklet unit is set.
• Sensor (booklet bin media present)
–  This photo sensor detects paper availability on the booklet media bin. If 15 sets of printouts are detected 
in the booklet media bin, it will be considered as Full Stack.
Booklet media bin 
Operation
The upper media bin contains the sensor (upper media bin full) to detect the media stack volume in the upper 
media...

Diagnostic aids 3-97
  5058-030
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Operation
The stacker media bin moves to an appropriate position according to the volume of media fed from the compiler 
unit assembly. The sensor (stacker bin level 1) and the sensor (stacker bin level 2) detect the height of media in 
the stacker media bin, and the sensor (stacker bin level encoder) determines the volume of media in the tray.
When media or the stacker media bin comes between the light emitter and the photo-receiver of the sensor...

3-98  Service Manual 5058-030  
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The stacker media bin lowers according to the volume of media it contains. If any obstacle under the tray 
hinders the tray from lowering, the stacker lower safety warning is detected, and the stacker media bin is 
stopped. 
Full stack detection
A full stack is detected when media in the stacker media bin becomes full to prevent media jam or falling of 
media to the floor. The stacker media bin can stack up to approximately 3000 sheets.
The media...