Lexmark T650 Series Service Manual

Diagnostic aids 3-83
4062-XXX
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Auto density sensing
The image density sensor assembly uses a reflection type sensor that detects a pre-placed toner patch and
image on the photoconductor (drum) and outputs pulses when the central line of the patch image aligns with
the central line of the detector. The sensor outputs pulses at the timing the patch image passes the sensor.
Therefore, observing changes of intervals at which pulses are output leads to toner density detection.
Sensor shield assembly
Sensor (toner density)

Lexmark T650 Series Specifications

General

Print Technology	Monochrome Laser
Print Speed	Up to 45 ppm
Print Resolution	1200 x 1200 dpi
Monthly Duty Cycle	Up to 200, 000 pages
Standard Output Capacity	250 sheets
Processor Speed	500 MHz
Connectivity	USB, Ethernet
Maximum Paper Size	8.5 x 14 inches
Operating System Compatibility	Windows, Mac OS, Linux
Memory	128 MB, expandable to 640 MB
Standard Input Capacity	650 sheets