HP 4300 Service Manual - Page 147
Formatter system, PowerSave, Resolution Enhancement technology - printer driver download
UPC - 808736312264
View all HP 4300 manuals
Add to My Manuals
Save this manual to your list of manuals |
Page 147 highlights
Formatter system Note The formatter is responsible for the following procedures: q Controlling the PowerSave mode q Receiving and processing print data from the various printer I/Os q Monitoring control panel functions and relaying printer status information (through the control panel and the bidirectional I/O) q Developing and coordinating data placement and timing with the DC controller PCA q Storing font information q Communicating with the host computer through the bidirectional interface The formatter receives a print job from the bidirectional interface and separates it into image information and instructions that control the printing process. The DC controller PCA synchronizes the image formation system with the paper input and output systems, and then signals the formatter to send the print image data. The formatter also provides the electrical interface and mounting locations for two EIO cards, additional memory DIMMs, the hard-disk accessory, and the optional HP Fast Infrared Receiver. PowerSave This feature in the configuration menu conserves power after the printer has been idle for an adjustable period of time. When the printer is in PowerSave mode, the control panel backlight is turned off, but the printer retains all printer settings, downloaded fonts, and macros. The default setting is POWERSAVE=ON, with a 30-minute idle time. PowerSave can also be turned OFF from the resets menu on the control panel. The printer exits PowerSave mode and enters the warm-up cycle when any of the following occurs: q A print job, valid data, or a PML or PJL command is received at the parallel port, serial port, FIR port, or EIO card q A control panel key is pressed q The top cover is opened q A paper tray is opened q The engine test button is pressed Printer error messages override the PowerSave message. The printer enters PowerSave mode at the appropriate time, but the error message continues to appear. Note Resolution Enhancement technology The formatter contains circuitry for Resolution Enhancement technology (REt), which modifies the standard video dot data on its way to the DC controller PCA to produce "smoothed" line edges. The REt can be turned on or off from the control panel or from some software applications. The default setting is medium. The REt settings sent from software applications or printer drivers override the control-panel settings. Q2431-90912 Chapter 5 Theory of operation 127