HP 1018 Service Manual - Page 47

Formatter system, Central processing unit, RAM, USB interface, Control panel, Draft mode (EconoMode) - laserjet toner cartridges

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Page 47 highlights

Formatter system The formatter coordinates the major systems. It is responsible for the following tasks: ● Receiving and processing print data from the printer interface (the computer) ● Monitoring the control panel and relaying printer-status information ● Coordinating image formation and timing with the print engine ● Communicating with the host computer through the bidirectional interface The formatter receives print data from the universal serial bus (USB) interface and converts it into a dot image. The ECU synchronizes the image-formation system with the paper-feed system and signals the formatter to send the print-image data to the laser system. The formatter sends the printimage data (dots) in the form of a video signal, and the printing process begins. Central processing unit The formatter uses an embedded Coldfire V4 microprocessor operating at 133 MHz. RAM ● One bank of nonvolatile RAM (NVRAM) stores parameters. ● Dynamic random access memory (DRAM) provides temporary storage of the product program code and print data. ● The HP LaserJet 1018 printer has 2 MB of RAM. USB interface The formatter receives incoming data through the USB interface. This interface provides high-speed, two-way communication between the printer and the host, allowing applications on the host computer to change printer settings and monitor printer status. The USB interface is compatible with the USB 2.0 specification. Control panel The control panel consists of two status lights. Draft mode (EconoMode) Depending on which driver is used, selecting draft or EconoMode from the driver allows the product to use less toner, extending the life of the print cartridge. There is a change in print quality when this setting is used. NOTE HP does not recommend the full-time use of EconoMode. If EconoMode is used fulltime when the average toner coverage is very low, it is possible that the toner supply will outlast the mechanical parts of the print cartridge. HP Memory Enhancement technology (MEt) HP MEt effectively doubles the standard memory through a variety of font- and data-compression methods. ENWW Formatter system 39

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Formatter system
The formatter coordinates the major systems. It is responsible for the following tasks:
●
Receiving and processing print data from the printer interface (the computer)
●
Monitoring the control panel and relaying printer-status information
●
Coordinating image formation and timing with the print engine
●
Communicating with the host computer through the bidirectional interface
The formatter receives print data from the universal serial bus (USB) interface and converts it into a
dot image. The ECU synchronizes the image-formation system with the paper-feed system and
signals the formatter to send the print-image data to the laser system. The formatter sends the print-
image data (dots) in the form of a video signal, and the printing process begins.
Central processing unit
The formatter uses an embedded Coldfire V4 microprocessor operating at 133 MHz.
RAM
●
One bank of nonvolatile RAM (NVRAM) stores parameters.
●
Dynamic random access memory (DRAM) provides temporary storage of the product program
code and print data.
●
The HP LaserJet 1018 printer has 2 MB of RAM.
USB interface
The formatter receives incoming data through the USB interface. This interface provides high-speed,
two-way communication between the printer and the host, allowing applications on the host computer
to change printer settings and monitor printer status. The USB interface is compatible with the USB
2.0 specification.
Control panel
The control panel consists of two status lights.
Draft mode (EconoMode)
Depending on which driver is used, selecting draft or EconoMode from the driver allows the product
to use less toner, extending the life of the print cartridge. There is a change in print quality when this
setting is used.
NOTE
HP does not recommend the full-time use of EconoMode. If EconoMode is used full-
time when the average toner coverage is very low, it is possible that the toner supply will
outlast the mechanical parts of the print cartridge.
HP Memory Enhancement technology (MEt)
HP MEt effectively doubles the standard memory through a variety of font- and data-compression
methods.
ENWW
Formatter system
39