Hewlett-Packard Color LaserJet 1500 Service Manual
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Brand: HP
Category: All in One Printer , PDA , Printer
Type: Service manual for HP 1500
Pages: 312 (14.61 Mb)
ENWW 4 Theory of operation 91
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 41. Print cartridge