HP 2500 Service Manual - Page 84
Print cartridge, The carousel motor rotates the E-label reader
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Print cartridge The printer has four print cartridges: yellow, magenta, cyan, and black. Each print cartridge contains a developing cylinder, toner-feed roller, and stirrer. The developer motor rotates these parts, so that each print cartridge can use toner to form a visible image on the drum. The carousel motor rotates the E-label reader, which communicates E-label information to the dc controller. The developing rotary/toner level detection PCB uses an LED (light emitter) and a photodiode (light receiver) to determine the toner level in each print cartridge. Figure 37. Print cartridge 82 Theory of operation C9706-90926
82
Theory of operation
C9706-90926
Print cartridge
The printer has four print cartridges: yellow, magenta, cyan, and black. Each print cartridge
contains a developing cylinder, toner-feed roller, and stirrer. The developer motor rotates these
parts, so that each print cartridge can use toner to form a visible image on the drum.
The carousel motor rotates the E-label reader, which communicates E-label information to the dc
controller.
The developing rotary/toner level detection PCB uses an LED (light emitter) and a photodiode
(light receiver) to determine the toner level in each print cartridge.
Figure 37.
Print cartridge